https://n2htt.radio/introduction-to-3d-printing-resource-page/https://n2htt.radio/wp-content/uploads/2023/01/intro3d-printing_revised.pngIntro3D-Printing_Revised2023-02-02T00:39:12+00:00weekly0.6https://n2htt.radio/icom-ic-705-protective-frame-kit-assembly-and-installation/2021-01-18T02:47:40+00:00weekly0.6https://n2htt.radio/my_qrp_rigs_kx1/2020-10-09T01:00:00+00:00weekly0.6https://n2htt.radio/3d-printed-cootie-key-v2-0/2019-10-12T00:43:50+00:00weekly0.6https://n2htt.radio/2019/07/21/digital-on-board/https://n2htt.radio/wp-content/uploads/2019/07/ft817.jpgFT-817 listening to FT8 on 40mFT-817 listening to FT8 on 40mhttps://n2htt.radio/wp-content/uploads/2019/07/battery.jpgBioenno 4.5 AH LiFePo BatteryBioenno 4.5 AH LiFePo Batteryhttps://n2htt.radio/wp-content/uploads/2019/07/cute_keyboard.jpgCute Bluetooth keyboardCute Bluetooth keyboardhttps://n2htt.radio/wp-content/uploads/2019/07/tablet.jpgRasberry Pi desktop running WSJTX on an Android tablet via VNCRasberry Pi desktop running WSJTX on an Android tablet via VNChttps://n2htt.radio/wp-content/uploads/2019/07/extremelystrong.jpgextremelystrongScotch "Extermely Stong" fastenerhttps://n2htt.radio/wp-content/uploads/2019/07/pi.jpgRaspberry Pi 3B+ in classy caseRaspberry Pi 3B+ in classy casehttps://n2htt.radio/wp-content/uploads/2019/07/usbcable.jpgHomebrew micro USB cable and right angle adapterHomebrew micro USB cable and right angle adapterhttps://n2htt.radio/wp-content/uploads/2019/07/dcdcconverter.jpgDC-DC converterDC-DC converterhttps://n2htt.radio/wp-content/uploads/2019/07/k9jeb.jpgK9JEB power distribution blockK9JEB power distribution blockhttps://n2htt.radio/wp-content/uploads/2019/07/gps.jpgGPS and rig control donglesGPS and rig control dongles2019-07-22T12:28:50+00:00monthlyhttps://n2htt.radio/2019/07/07/oscope-fun/https://n2htt.radio/wp-content/uploads/2019/07/2019-05-08-20.46.56.jpgReplacement back for the DSO 150 scope with L-ion battery, charge controller and buck converterReplacement back for the DSO 150 scope with L-ion battery, charge controller and buck converterhttps://n2htt.radio/wp-content/uploads/2019/07/2019-05-05-14.33.25.jpgO'scope Fun Board implementation of CW practice oscillatorO'scope Fun Board implementation of CW practice oscillatorhttps://n2htt.radio/wp-content/uploads/2019/07/2019-05-11-12.50.32.jpgQRPMe O'sope Fun Board with DSO 150 scopeQRPMe O'sope Fun Board with DSO 150 scope2019-07-07T20:43:11+00:00monthlyhttps://n2htt.radio/dso-150-cheat-sheet/2019-07-07T20:09:51+00:00weekly0.6https://n2htt.radio/2019/05/26/hello-antuino/https://n2htt.radio/wp-content/uploads/2019/05/home_pwr_14100_mhz.jpgHome screen setup for power scan at 7050 kHzHome screen setup for power scan at 7050 kHzhttps://n2htt.radio/wp-content/uploads/2019/05/graph_pwr_14100mhz.jpggraph_pwr_14100mhzhttps://n2htt.radio/wp-content/uploads/2019/05/graph_pwr_7050mhz.jpggraph_pwr_7050mhzhttps://n2htt.radio/wp-content/uploads/2019/05/home_pwr_7050.jpgHome screen setup for power scan at 7050 kHzHome screen setup for power scan at 7050 kHzhttps://n2htt.radio/wp-content/uploads/2019/05/voltage_divider_sniffer.jpgDummy load sniffer with wire pickupDummy load sniffer with wire pickuphttps://n2htt.radio/wp-content/uploads/2019/05/graph_sna_low_pass_filt.jpgLow pass filter plotLow pass filter plothttps://n2htt.radio/wp-content/uploads/2019/05/home_sna_low_pass_filt.jpgHome screen setup to plot filter responseHome screen setup to plot filter responsehttps://n2htt.radio/wp-content/uploads/2019/05/graph_swr_80_meters.jpg80 meter SWR plot80 meter SWR plothttps://n2htt.radio/wp-content/uploads/2019/05/home_swr_80_mtr.jpgHome screen setup for sweeping 80 meter SWRHome screen setup for sweeping 80 meter SWRhttps://n2htt.radio/wp-content/uploads/2019/05/graph_pwr_fm_band.jpgFM Broadcast BandFM Broadcast Band2020-03-26T13:57:39+00:00monthlyhttps://n2htt.radio/2014/12/07/the-michigan-mighty-mite-grows-a-user-interface-and-steps-out/https://n2htt.radio/wp-content/uploads/2014/12/n2htt_rbn_mmm.pngn2htt_rbn_mmmScreen shot of RBN website showing the CQs from the MMMhttps://n2htt.radio/wp-content/uploads/2014/12/2014-12-07-10-54-08.jpg2014-12-07 10.54.08Side panel on the MMMhttps://n2htt.radio/wp-content/uploads/2014/12/2014-12-07-10-54-19.jpg2014-12-07 10.54.19Michigan Mighty Mite, now with user interface2017-11-04T15:44:46+00:00monthlyhttps://n2htt.radio/2017/11/04/goodbye-old-paint/https://n2htt.radio/wp-content/uploads/2017/11/2017-10-25-20-54-11.jpgSignal cleaned up, and measured with cursor featureSignal cleaned up, and measured with cursor featurehttps://n2htt.radio/wp-content/uploads/2017/11/2017-10-25-20-51-34.jpgThe dirty secrets of the unfiltered signal revealedThe dirty secrets of the unfiltered signal revealedhttps://n2htt.radio/wp-content/uploads/2017/11/2017-10-25-20-41-54.jpgPristine signal, post low pass filterPristine signal, post low pass filterhttps://n2htt.radio/wp-content/uploads/2017/11/2017-10-25-20-43-12.jpgVery not good looking transmitter output, before filterVery not good looking transmitter output, before filterhttps://n2htt.radio/wp-content/uploads/2017/11/rigolds1054z.jpgRigol DS1054ZRigol DS1054Zhttps://n2htt.radio/wp-content/uploads/2017/11/035input.jpgBK Precision 20MHz dual channel oscilloscope, doing its thingBK Precision 20MHz dual channel oscilloscope, doing its thing2017-11-04T15:39:03+00:00monthlyhttps://n2htt.radio/2017/08/20/automating-the-eclipse/https://n2htt.radio/wp-content/uploads/2017/08/n1mm-kx3.pngN1MM logger hooked up to the KX3N1MM logger hooked up to the KX32017-08-20T14:43:24+00:00monthlyhttps://n2htt.radio/2017/07/20/roll-your-own/https://n2htt.radio/wp-content/uploads/2017/07/testing_unun_with_paper_resistor.jpgTesting the 1:60 unun with a paper resistor!Testing the 1:60 unun with a paper resistor!https://n2htt.radio/wp-content/uploads/2017/07/3000_ohms_dialed_in.jpg3k on the button!3k on the button!https://n2htt.radio/wp-content/uploads/2017/07/ready_for_parallel_hookup.jpgGraphite covered index card pieces, ready for parallel hookupGraphite covered index card pieces, ready for parallel hookup2017-07-20T22:58:04+00:00monthlyhttps://n2htt.radio/2017/04/09/nice-guys/https://n2htt.radio/wp-content/uploads/2017/04/jobfinishedmastup.jpgBeautifuly guyed mast, which we needed for some reason...Beautifuly guyed mast, which we needed for some reason..https://n2htt.radio/wp-content/uploads/2017/04/securedbytruckershitch.jpgGuy line tensioned and secured with trucker's hitchGuy line tensioned and secured with trucker's hitchhttps://n2htt.radio/wp-content/uploads/2017/04/leaningbutselfstanding.jpgSelf-standing, but leaning overSelf-standing, but leaning overhttps://n2htt.radio/wp-content/uploads/2017/04/startingthemastup.jpgcStarting the mast uphttps://n2htt.radio/wp-content/uploads/2017/04/nearnotthroughthefirstloop.jpgUse the first loop to position the stake.Use the first loop to position the stake.https://n2htt.radio/wp-content/uploads/2017/04/the-stakeout.jpgThe StakeoutThe Stakeouthttps://n2htt.radio/wp-content/uploads/2017/04/twoloopsinguyline.jpgGuy line with two permanent loops tied inGuy line with two permanent loops tied inhttps://n2htt.radio/wp-content/uploads/2017/04/diagram2.jpgDetail drawing explaining trigonometryDetail drawing explaining trigonometryhttps://n2htt.radio/wp-content/uploads/2017/04/permanentloop.jpgA Permanent Loop (bight tied in an overhand knot)A Permanent Loop (bight tied in an overhand knot)2017-07-04T19:16:48+00:00monthlyhttps://n2htt.radio/2017/01/22/a-cootie/https://n2htt.radio/wp-content/uploads/2017/01/non_slip.jpgNon-slip rug backingNon-slip rug backinghttps://n2htt.radio/wp-content/uploads/2017/01/strain_relief.jpgStrain reliefStrain reliefhttps://n2htt.radio/wp-content/uploads/2017/01/buton_fingerpieces.jpgCoat button finger piecesCoat button finger pieceshttps://n2htt.radio/wp-content/uploads/2017/01/lta_cootie.jpgLTA cootie, on a nice chunk of granit countertopLTA cootie, on a nice chunk of granit countertophttps://n2htt.radio/wp-content/uploads/2017/01/depot_cootie.jpgThe "Depot" cootie keyThe "Depot" cootie key2017-02-06T02:07:12+00:00monthlyhttps://n2htt.radio/2017/01/09/another-radio-another-vxo/https://n2htt.radio/wp-content/uploads/2017/01/2017-01-01-14-05-13.jpgOn the air for SKN!On the air for SKN!https://n2htt.radio/wp-content/uploads/2017/01/7055ish.jpg7055ish pluggable VXO7055ish pluggable VXOhttps://n2htt.radio/wp-content/uploads/2017/01/toroid_after.jpgToroid after squeezingToroid after squeezinghttps://n2htt.radio/wp-content/uploads/2017/01/toroid_before.jpgToroid before squeezingToroid before squeezinghttps://n2htt.radio/wp-content/uploads/2017/01/xtal_front_back.jpgBoth sides of HC49 to FT-243 crystal adapter board.Both sides of HC49 to FT-243 crystal adapter board.https://n2htt.radio/wp-content/uploads/2017/01/2016-12-25-22-50-40.jpgDecorated box (romance side.)Decorated box (romance side.)https://n2htt.radio/wp-content/uploads/2017/01/2016-12-25-22-49-07.jpgWooden box with travel decalsWooden box with travel decalshttps://n2htt.radio/wp-content/uploads/2017/01/2016-12-29-11-31-43.jpgBayou Jumper board, spiral coils visible upper right.Bayou Jumper board, spiral coils visible upper right.https://n2htt.radio/wp-content/uploads/2017/01/2017-01-07-21-34-49.jpgThe Bayou Jumper, a Paraset replica in a wooden box.The Bayou Jumper, a Paraset replica in a wooden box.2019-10-29T13:32:45+00:00monthlyhttps://n2htt.radio/2016/11/26/wiggle-room/https://n2htt.radio/wp-content/uploads/2016/11/2016-11-26-12-36-23.jpg300 ohm twin-lead terminated with weird plastic plug300 ohm twin-lead terminated with weird plastic plughttps://n2htt.radio/wp-content/uploads/2016/11/2016-11-26-11-56-30.jpgCoax terminated with plug made from an FT-241 crystal holderCoax terminated with plug made from an FT-241 crystal holderhttps://n2htt.radio/wp-content/uploads/2016/11/2016-11-26-12-28-24.jpgHC/6. FT-243, and FT-241 crystals all share same pinoutHC/6. FT-243, and FT-241 crystals all share same pinouthttps://n2htt.radio/wp-content/uploads/2016/11/2016-11-25-18-29-46.jpgVXO connected to the Knight T-60 TransmitterVXO connected to the Knight T-60 Transmitterhttps://n2htt.radio/wp-content/uploads/2016/11/2016-11-26-11-36-38.jpgExternal VXO with HC/6 crystal onboardExternal VXO with HC/6 crystal onboard2021-11-04T20:22:02+00:00monthlyhttps://n2htt.radio/2016/10/09/novices/https://n2htt.radio/wp-content/uploads/2016/10/2016-10-08-21-18-43.jpgSpooky, but cuteSpooky, but cutehttps://n2htt.radio/wp-content/uploads/2016/10/2016-10-08-20-57-40.jpgCubic Communications ST-3B tunerCubic Communications ST-3B tunerhttps://n2htt.radio/wp-content/uploads/2016/10/2016-10-08-20-57-08.jpgHM-2140 Watt MeterHM-2140 Watt Meterhttps://n2htt.radio/wp-content/uploads/2016/10/2016-10-08-21-03-15.jpgHS-1661 SpeakerHS-1661 Speakerhttps://n2htt.radio/wp-content/uploads/2016/10/2016-10-08-21-01-12.jpgComplete Heathkit Novice StationComplete Heathkit Novice Station2016-10-09T18:56:17+00:00monthlyhttps://n2htt.radio/2016/09/11/together-again-for-the-first-time/https://n2htt.radio/wp-content/uploads/2016/09/2016-09-03-12_22_15-settings.pngRBN can hear me!RBN can hear me!https://n2htt.radio/wp-content/uploads/2016/09/2016-08-27-11-52-53.jpgIt's alive!It's alive!https://n2htt.radio/wp-content/uploads/2016/09/s-l1600-15.jpgNew cable and plugsNew cable and plugshttps://n2htt.radio/wp-content/uploads/2016/09/s-l1600-13.jpgLucky manual findLucky manual findhttps://n2htt.radio/wp-content/uploads/2016/09/s-l1600-12.jpgDodgy home-made cableDodgy home-made cablehttps://n2htt.radio/wp-content/uploads/2016/09/s-l1600-9.jpgThe wiring looked goodThe wiring looked goodhttps://n2htt.radio/wp-content/uploads/2016/09/2016-09-03-18-24-30.jpgNew arrival in the shackNew arrival in the shack2016-09-11T20:05:39+00:00monthlyhttps://n2htt.radio/2016/06/24/t-r-time-machine/https://n2htt.radio/wp-content/uploads/2016/06/trtm_front_view.jpgT-R Time Machine with working LED indicatorsT-R Time Machine with working LED indicatorshttps://n2htt.radio/wp-content/uploads/2016/06/trtm_back.jpgT-R Time Machine back panelT-R Time Machine back panelhttps://n2htt.radio/wp-content/uploads/2016/06/trtm_top_interior_view.pngT-R Time Machine, interior viewT-R Time Machine, interior viewhttps://n2htt.radio/wp-content/uploads/2016/06/trtm_front.jpgtrtm_frontT-R Time Machine, front panel2016-07-01T11:16:24+00:00monthlyhttps://n2htt.radio/2016/05/31/in-the-loop/https://n2htt.radio/wp-content/uploads/2016/05/north-american-porcupine.jpgNorth American PorcupineNorth American Porcupinehttps://n2htt.radio/wp-content/uploads/2016/05/1200px-taxidea_taxus_point_reyes_2007.jpg1200px-Taxidea_taxus_(Point_Reyes,_2007)Badger, By Yathin S Krishnappa - Own work, CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=24504952https://n2htt.radio/wp-content/uploads/2016/05/methodoftwocardboardbobbins.jpgMethodOfTwoCardboardBobbinsA large quantity of cheap twisted-pair, and the Method of Two Cardboard Bobbinshttps://n2htt.radio/wp-content/uploads/2016/05/pillbottlebalun.jpgpillBottleBalunPill bottle 4:1 balun, wrapped in attractive violet electrical tapehttps://n2htt.radio/wp-content/uploads/2016/05/topcornerconnection.jpgtopCornerConnectionTop corner of the loop showing ring terminal crimped in place.https://n2htt.radio/wp-content/uploads/2016/05/hardtosee30meterloop.jpghardToSee30MeterLoopHard to see 30 meter loophttps://n2htt.radio/wp-content/uploads/2016/05/kx1onclipboard.jpgKX1OnClipboardKX1 portable operating station, on homebrewed custom clipboard2016-05-31T06:07:52+00:00monthlyhttps://n2htt.radio/2016/04/16/a-tale-of-two-vfos/https://n2htt.radio/wp-content/uploads/2016/04/hg-10innovicestation.pngTHe HG-10 takes its place in the Novice StationTHe HG-10 takes its place in the Novice Stationhttps://n2htt.radio/wp-content/uploads/2016/04/theold2diodetrick.pngThe old 2-diode trick for simultaneous keying of the VFO and transmitterThe old 2-diode trick for simultaneous keying of the VFO and transmitterhttps://n2htt.radio/wp-content/uploads/2016/04/v-44instation.pngV-44 in Novice StationV-44 in Novice Stationhttps://n2htt.radio/wp-content/uploads/2016/04/newcoil.pngRebuilt main tuning coilRebuilt main tuning coilhttps://n2htt.radio/wp-content/uploads/2016/04/artisanalcoildope.pngArtisanal Coil DopeArtisanal Coil Dopehttps://n2htt.radio/wp-content/uploads/2016/04/pennyandquartertechnique.pngpenny and quarter technique, afer turn 23penny and quarter technique, afer turn 23https://n2htt.radio/wp-content/uploads/2016/04/bustedcoil.pngCarefully modified main tank coilCarefully modified main tank coilhttps://n2htt.radio/wp-content/uploads/2016/04/knightv44.pngKnight V-44 VFOKnight V-44 VFO2016-04-17T00:51:42+00:00monthlyhttps://n2htt.radio/2014/12/03/the-dfr-just-briefly/https://n2htt.radio/wp-content/uploads/2014/12/dfr-n2htt-photo-b-interior.jpgDFR-N2HTT-Photo-B-interior2016-04-09T02:48:05+00:00monthlyhttps://n2htt.radio/2016/03/24/rockbound-no-more-almost/https://n2htt.radio/wp-content/uploads/2016/03/duplex_key.jpgTandem keying interfaceTandem keying interfacehttps://n2htt.radio/wp-content/uploads/2016/03/fixed_waveform.jpgOutput waveform on 80M after modOutput waveform on 80M after modhttps://n2htt.radio/wp-content/uploads/2016/03/chokes_interchanged.jpgRF Chokes, interchangedRF Chokes, interchangedhttps://n2htt.radio/wp-content/uploads/2016/03/chokes_original.jpgRF Chokes before the modRF Chokes before the modhttps://n2htt.radio/wp-content/uploads/2016/03/distorted_waveform.jpgClipped waveform on 80MClipped waveform on 80Mhttps://n2htt.radio/wp-content/uploads/2016/03/under_chassis_wiring.jpgPSU under chassis wiringPSU under chassis wiringhttps://n2htt.radio/wp-content/uploads/2016/03/hg-10_under_chassis.jpghg-10_under_chassishg-10_under_chassishttps://n2htt.radio/wp-content/uploads/2016/03/finished_psu.jpgFinished HV PSUFinished HV PSUhttps://n2htt.radio/wp-content/uploads/2016/03/modified_psu.pngHG-10 Modified PSUHG-10 PSU, modified for back to back filament transformershttps://n2htt.radio/wp-content/uploads/2016/03/psu.pngHG-10 PSUHG-10 PSU as described in the manual2016-03-24T20:51:31+00:00monthlyhttps://n2htt.radio/2016/01/24/snowy-day-new-glue/https://n2htt.radio/wp-content/uploads/2016/01/2016-01-24-13-38-58.jpgCrystal set, decorated.Crystal set, decorated.https://n2htt.radio/wp-content/uploads/2016/01/2016-01-24-13-42-32.jpgFrozen charlotte, guarding the entrance to the coil.Frozen charlotte, guarding the entrance to the coil.https://n2htt.radio/wp-content/uploads/2016/01/2016-01-24-12-50-32.jpgNo more alligator clips. (Well, only one.)No more alligator clips. (Well, only one.)https://n2htt.radio/wp-content/uploads/2016/01/2016-01-24-12-33-38.jpgFront panel attched with UV glue (Fluorescing)Front panel attched with UV glue (Fluorescing)https://n2htt.radio/wp-content/uploads/2016/01/2016-01-24-11-29-41.jpgSO-239 attached with UV glue. (Glue is fluorescing)SO-239 attached with UV glue. (Glue is fluorescing)https://n2htt.radio/wp-content/uploads/2016/01/2016-01-24-14-10-32.jpgMast still up after JonasMast still up after Jonas2016-01-24T23:07:39+00:00monthlyhttps://n2htt.radio/2016/01/17/a-complete-digression/https://n2htt.radio/wp-content/uploads/2016/01/schematic.pngschematicSchematic for my version.https://n2htt.radio/wp-content/uploads/2016/01/on_the_aerial.jpgon_the_aerialAttached to the antenna (new diode)https://n2htt.radio/wp-content/uploads/2016/01/high_impedance_headphones.pnghigh_impedance_headphonesHigh Impedance Headphoneshttps://n2htt.radio/wp-content/uploads/2016/01/philmore_detector.pngphilmore_detectorThe mysterious Philmore Fixed Crystal DETECTOR2016-01-19T03:53:39+00:00monthlyhttps://n2htt.radio/2015/11/28/a-key-repair/https://n2htt.radio/wp-content/uploads/2015/11/2015-11-08-13-17-33.jpgGlue job at 23 hours 59 minutes... wait for it..Glue job at 23 hours 59 minutes... wait for it..https://n2htt.radio/wp-content/uploads/2015/11/2015-11-08-13-18-03.jpgThe epoxy user's friendThe epoxy user's friendhttps://n2htt.radio/wp-content/uploads/2015/11/2015-11-08-13-10-16.jpgPreparing to clamp glue jobPreparing to clamp glue jobhttps://n2htt.radio/wp-content/uploads/2015/11/2015-11-08-13-05-34.jpgBroken bakelite pedestalBroken bakelite pedestalhttps://n2htt.radio/wp-content/uploads/2015/11/2015-11-23-19-40-09.jpgThe K4 key, after repairThe K4 key, after repairhttps://n2htt.radio/wp-content/uploads/2015/11/2015-11-27-17-27-54.jpgChinese K-5 keyChinese K-5 keyhttps://n2htt.radio/wp-content/uploads/2015/11/maker3-7072-2.jpgCW Demonstration, B&N Maker Faire (photo by M. Pritchard, NM9J)CW Demonstration, B&N Maker Faire (photo by M. Pritchard, NM9J)https://n2htt.radio/wp-content/uploads/2015/11/dfr-n2htt-photo-b-interior.jpgDFR under the hood (arduino stack on left, keying circuit on right)DFR under the hood (arduino stack on left, keying circuit on right)https://n2htt.radio/wp-content/uploads/2015/11/dfr-n2htt-photo-a-front-panel.jpgDFR front panelDFR front panel2022-01-23T23:10:27+00:00monthlyhttps://n2htt.radio/2015/11/01/new-wire/https://n2htt.radio/wp-content/uploads/2015/11/new_mast.jpgThe new mastThe new masthttps://n2htt.radio/wp-content/uploads/2015/11/wire_staked_out.jpgHard to see wire staked out for measurementHard to see wire staked out for measurementhttps://n2htt.radio/wp-content/uploads/2015/11/carefully_organized_tools_and_supplies.jpgCarfully organized tools and materialsCarfully organized tools and materialshttps://n2htt.radio/wp-content/uploads/2015/11/installation_crew.jpgInstallation crew hard at workInstallation crew hard at workhttps://n2htt.radio/wp-content/uploads/2015/10/remains_of_old_mast.jpgSad remains of old mastSad remains of old masthttps://n2htt.radio/wp-content/uploads/2015/10/154978495-crop_-article568-large.jpgSandy 10/29/2012Sandy 10/29/20122015-11-14T17:19:44+00:00monthlyhttps://n2htt.radio/2015/10/24/j-38-madness/https://n2htt.radio/wp-content/uploads/2015/10/final_product.jpgLionel J-38 - final productLionel J-38 - final producthttps://n2htt.radio/wp-content/uploads/2015/10/key_no_base.jpgLionel J-38 reassembled, no baseLionel J-38 reassembled, no basehttps://n2htt.radio/wp-content/uploads/2015/10/tiny_weird_bits.jpgTiny weird bitsTiny weird bitshttps://n2htt.radio/wp-content/uploads/2015/10/white_metal_bits.jpgThe white metal bitsThe white metal bitshttps://n2htt.radio/wp-content/uploads/2015/10/right_side_bits.jpgThe right side bitsThe right side bitshttps://n2htt.radio/wp-content/uploads/2015/10/center_bits.jpgThe center bitsThe center bitshttps://n2htt.radio/wp-content/uploads/2015/10/left_side_bits.jpgLeft side bitsLeft side bitshttps://n2htt.radio/wp-content/uploads/2015/10/gritty_closeup.jpgGritty close-upGritty close-uphttps://n2htt.radio/wp-content/uploads/2015/10/2015-10-21-22-27-17.jpgLionel J-38 as receivedLionel J-38 as receivedhttps://n2htt.radio/wp-content/uploads/2015/10/white_metal_key.jpgThe white metal J-38 keyThe white metal J-38 key2019-11-11T14:51:26+00:00monthlyhttps://n2htt.radio/2015/10/11/if-it-aint-fixed-dont-break-it/https://n2htt.radio/wp-content/uploads/2015/10/contactdetails.pngSMK contact detailsSMK contact detailshttps://n2htt.radio/wp-content/uploads/2015/10/2015-10-11-18-05-41.jpgThe whole 30 watt enchiladaThe whole 30 watt enchiladahttps://n2htt.radio/wp-content/uploads/2015/10/rewiredwithoutfilters.pngFilter board removed, contacts wired directly to terminals.Filter board removed, contacts wired directly to terminals.https://n2htt.radio/wp-content/uploads/2015/10/sovietkeyopened-filterboard.pngSMK filter circuit boardSMK filter circuit boardhttps://n2htt.radio/wp-content/uploads/2015/10/2015-10-11-18-15-31.jpgSoviet Military Key with the hood openSoviet Military Key with the hood openhttps://n2htt.radio/wp-content/uploads/2015/10/2015-10-11-18-15-57.jpgSoviet Military KeySoviet Military Keyhttps://n2htt.radio/wp-content/uploads/2015/10/ontheshelf.pngOnTheShelfOn the shelf, ready...https://n2htt.radio/wp-content/uploads/2015/10/knight_t-60_transmitter.pngKnight T-60 TransmitterKnight T-60 Transmitter2015-10-12T01:20:26+00:00monthlyhttps://n2htt.radio/2015/10/03/2b-redux/https://n2htt.radio/wp-content/uploads/2015/10/workingwithaudio.pngPhoto of beautiful CW audio coming out of the refurbished 2B.Photo of beautiful CW audio coming out of the refurbished 2B.https://n2htt.radio/wp-content/uploads/2015/10/roguesgallery.pngThe rogues gallery.The rogues gallery.https://n2htt.radio/wp-content/uploads/2015/10/theotherelectorlytic.pngThe other electrolytic to be replaced.The other electrolytic to be replaced.https://n2htt.radio/wp-content/uploads/2015/10/capcan.pngBase of the can caps, before replacement.Base of the can caps, before replacementhttps://n2htt.radio/wp-content/uploads/2015/10/othermods.pngTwo other 25 uF caps at points between detectors and audio stage.Two other 25 uF caps at points between detectors and audio stage.https://n2htt.radio/wp-content/uploads/2015/10/can-cap-mod.pngExtra 150uF cap attached to can.Extra 150uF cap attached to can.https://n2htt.radio/wp-content/uploads/2015/10/drake_2b_mod_detail.pngAlien invasion!Alien invasion!https://n2htt.radio/wp-content/uploads/2015/10/resistance_chart_fixed.png2B resistance checks.2B resistance checks.https://n2htt.radio/wp-content/uploads/2015/10/spare_tubes.pngSomewhat obsesssive quantity of spare tubes.Somewhat obsesssive quantity of spare tubes.https://n2htt.radio/wp-content/uploads/2015/10/working.pngDrake 2B, working.Drake 2B, working.2015-10-03T13:09:50+00:00monthlyhttps://n2htt.radio/2015/08/04/the-qrp-blowtorch-rides-again/https://n2htt.radio/wp-content/uploads/2015/08/warm_glow.pngThe glow.The glow.https://n2htt.radio/wp-content/uploads/2015/08/qrpbt_station_upstate.pngThe QRP Blowtorch in its new homeThe QRP Blowtorch in its new homehttps://n2htt.radio/wp-content/uploads/2015/08/drake_2b_in_qrp_stack.pngDrake 2B in the QRP stackDrake 2B in the QRP stackhttps://n2htt.radio/wp-content/uploads/2015/08/mfj_1708_t_r_switch.pngMFJ-1708 T-R SwitchMFJ-1708 T-R Switchhttps://n2htt.radio/wp-content/uploads/2015/08/upstate_qth_flamingo_garden.pngUpstate QTH - Flamingo gardenUpstate QTH - Flamingo gardenhttps://n2htt.radio/wp-content/uploads/2015/08/adding_more_caps.pngAdditional filter caps strapped onAdditional filter caps strapped onhttps://n2htt.radio/wp-content/uploads/2015/08/qrpbt.pngThe QRP BlowtorchThe QRP Blowtorchhttps://n2htt.radio/wp-content/uploads/2015/08/hr-1660_in_qrp_stack.pngHR-1680 in the QRP stackHR-1680 in the QRP stackhttps://n2htt.radio/wp-content/uploads/2015/08/pcara_table_2014_ocarc_hamfest.pngPCARA Table at 2014 OCARC HamfestThe photo that started it all (by Malcolm Pritchard, courtesy of PCARA Update)https://n2htt.radio/wp-content/uploads/2015/08/qrp_on_the_beach.pngqrp_on_the_beach2015-08-17T22:26:11+00:00monthlyhttps://n2htt.radio/2015/05/09/the-other-display/https://n2htt.radio/wp-content/uploads/2015/05/3bvfo_lcd.png3bvfo_lcd3BVFO on 20x4 LCD Displayhttps://n2htt.radio/wp-content/uploads/2015/05/lcd_display.pnglcd_display#defines set up to compile LCD displayhttps://n2htt.radio/wp-content/uploads/2015/05/ssd1306_display.pngssd1306_display#defines set to compile OLED display codehttps://n2htt.radio/wp-content/uploads/2015/05/vfodisplay_uml.pngvfodisplay_umlVFODisplay class hierarchyhttps://n2htt.radio/wp-content/uploads/2015/05/backpack_installed.jpgbackpack_installed"Backpack" I2C adapter board installed on my 20x4 LCD displayhttps://n2htt.radio/wp-content/uploads/2015/05/oled.pngoled128x64 OLED display https://n2htt.radio/wp-content/uploads/2015/05/lcd.pnglcd20x4 LCD display as they are found in nature2015-06-23T20:55:20+00:00monthlyhttps://n2htt.radio/2015/05/02/more-software-less-radio/https://n2htt.radio/wp-content/uploads/2015/05/uncommentdefine.pngUncomment define to use smaller display bufferUncomment define to use smaller display bufferhttps://n2htt.radio/wp-content/uploads/2015/05/sampledisplayfunction.pngsampleDisplayFunctionExample of display function used with U8glibhttps://n2htt.radio/wp-content/uploads/2015/05/ssd1306.png0.96" OLED display, not showing problem0.96" OLED display, not showing problem2015-05-03T04:03:32+00:00monthlyhttps://n2htt.radio/2015/04/25/not-a-tube-project-version-1-1/https://n2htt.radio/wp-content/uploads/2015/04/3bandvfonowwithunosupport.pngNow with Uno R3 support!Now with Uno R3 support!2015-04-25T20:59:12+00:00monthlyhttps://n2htt.radio/2015/04/19/definitely-not-a-tube-project/https://n2htt.radio/wp-content/uploads/2015/04/adafruit_include_error.pngAdafruit_include_errorError when Adafruit ssd1306 includes appear more than once in a sketchhttps://n2htt.radio/wp-content/uploads/2015/04/arduino-proto-board-3-band-vfo.jpgarduino-proto-board-3-band-vfoArduino prototyping board in action.2017-07-05T23:36:17+00:00monthlyhttps://n2htt.radio/2015/04/03/is-there-a-pentode-in-the-house/https://n2htt.radio/wp-content/uploads/2015/04/010compare.jpg12EZ6 input/output at 1.0 MHz12EZ6 input/output at 1.0 MHzhttps://n2htt.radio/wp-content/uploads/2015/04/035compare.jpg12EZ6 input/output at 3.5 MHz12EZ6 input/output at 3.5 MHzhttps://n2htt.radio/wp-content/uploads/2015/04/070compare.jpg12EZ6 input/output at 7.0 MHz12EZ6 input/output at 7.0 MHzhttps://n2htt.radio/wp-content/uploads/2015/04/140compare.jpg12EZ6 input/output at 14.0 MHz12EZ6 input/output at 14.0 MHzhttps://n2htt.radio/wp-content/uploads/2015/04/005compare.jpg005compare12EZ6 input/output at 0.5 MHzhttps://n2htt.radio/wp-content/uploads/2015/04/7pin-breakout.png12EZ6 on the 7-pin breakout board12EZ6 on the 7-pin breakout boardhttps://n2htt.radio/wp-content/uploads/2015/04/schematic_pg20.pngCommon cathode RF amp with 12EZ6Common cathode RF amp with 12EZ6https://n2htt.radio/wp-content/uploads/2015/04/12ez6.png12ez6 data sheet12ez6 data sheet2015-04-04T03:13:26+00:00monthlyhttps://n2htt.radio/2015/03/16/mysteries-of-the-triode-revealed/https://n2htt.radio/wp-content/uploads/2015/03/out-7mhz.jpgout-7mhzOutput from grounded grid amp at 7 MHz, 12 volts on the plate.https://n2htt.radio/wp-content/uploads/2015/03/in-7mhz.jpgin-7mhzInput to the grounded grid amp at 7 MHzhttps://n2htt.radio/wp-content/uploads/2015/03/out-85khz.jpgout-85khzOutput from grounded grid amp at 85 kHz, with 12 volts on the plate.https://n2htt.radio/wp-content/uploads/2015/03/in-85khz.jpgin-85khzInput from signal generator at about 85kHzhttps://n2htt.radio/wp-content/uploads/2015/03/siggen.jpgsiggenVintage RCA signal generator.https://n2htt.radio/wp-content/uploads/2015/03/testbed.jpgtestbedOctal tube base test bed.https://n2htt.radio/wp-content/uploads/2015/03/21sn7platecurves-detail.jpg21sn7platecurves-detailDetail of plate curves, showing my design in the weeds.https://n2htt.radio/wp-content/uploads/2015/03/21sn7platecurves.jpgEPSON MFP imagePlate characteristics of the 12SN7. Notice my design lurking in the lower right corner.https://n2htt.radio/wp-content/uploads/2015/03/gg-schematic.jpggg-schematicMy schematic for the triode grounded grid amplifier.https://n2htt.radio/wp-content/uploads/2015/03/ti-3.jpgti-3TI-83+ Solver function, working on T= RC (time constant calculation)2015-03-22T15:58:37+00:00monthlyhttps://n2htt.radio/2015/03/08/something-completely-different/https://n2htt.radio/wp-content/uploads/2015/03/custom_heatsink_keying_transistor.pngcustom_heatsink_keying_transistorHeat sink on keying transistor, made from a small section of aluminum bar stock.https://n2htt.radio/wp-content/uploads/2015/03/custom_heatsink_final.pngcustom_heatsink_finalHeatsink on final transistor, made from a section of computer CPU heat sink.https://n2htt.radio/wp-content/uploads/2015/03/shunt_assembly.pngshunt_assemblyShunt constructed to adjust full scale meter reading of 1 amp.https://n2htt.radio/wp-content/uploads/2015/03/meter.pngmeterMeter in the Cubic Incher, reading 1 amp full scale.https://n2htt.radio/wp-content/uploads/2015/03/overview.jpgoverviewhttps://n2htt.radio/wp-content/uploads/2015/03/qst_articles.pngQST_articles2015-03-08T20:29:38+00:00monthlyhttps://n2htt.radio/2015/02/26/rosetta-stone/https://n2htt.radio/wp-content/uploads/2015/02/regen_block_diagram.pngregen_block_diagramFunctional blocks in my tube regen design.https://n2htt.radio/wp-content/uploads/2015/02/interstagecoupling.gifinterstagecouplingInterstage coupling methods, from "Building Notes for Tube Type Regenerative Radios", by Dave Schmarder, N2DS. Used with permission.2015-02-27T02:34:13+00:00monthlyhttps://n2htt.radio/regenerative-receiver-links/2015-04-26T13:18:53+00:00weekly0.6https://n2htt.radio/2015/02/08/bet-you-cant-build-just-one/https://n2htt.radio/wp-content/uploads/2015/02/40m_model.png40m_modelSpreadsheet showing solution for 40m and lower fixed capacitancehttps://n2htt.radio/wp-content/uploads/2015/02/80m_model.png80m_modelSpreadsheet showing solution for 80m and lower fixed capacitancehttps://n2htt.radio/wp-content/uploads/2015/02/80m-wbr-front-panel.jpg80m-wbr-front-panel80m WBR front panel with perforated steel plate over speaker.https://n2htt.radio/wp-content/uploads/2015/02/speaker_mount_with_screen.pngspeaker_mount_with_screenSpeaker mounted on PCB under window screen.https://n2htt.radio/wp-content/uploads/2015/02/empirical_toroid_formula.pngempirical_toroid_formulaEmpirical formula for T68-2 toroid inductancehttps://n2htt.radio/wp-content/uploads/2015/02/lc-resonance.pngLC resonanceResonance of an LC circuit2015-02-19T03:18:28+00:00monthlyhttps://n2htt.radio/about/https://n2htt.radio/wp-content/uploads/2013/11/recentavatar1-e1385007316989.jpgRecentAvatar12023-05-07T23:34:44+00:00weekly0.6https://n2htt.radio/2015/01/28/can-i-hear-you-now/https://n2htt.radio/wp-content/uploads/2015/01/inputtankrfstagev1.jpgInput Tank from RF Stage V1The balanced bridge input tank with center-tapped toroidhttps://n2htt.radio/wp-content/uploads/2015/01/precision_metal_shear.jpgprecision metal shearPrecision sheet metal shear, for delicate work.https://n2htt.radio/wp-content/uploads/2015/01/40m_wbr_installed.jpg40m WBR installedThe 40m WBR installed in its case, on the operating desk.https://n2htt.radio/wp-content/uploads/2015/01/40m_wbr_interior.jpg40M WBR interior40M WBR interiorhttps://n2htt.radio/wp-content/uploads/2015/01/2n3904.png2N39042N3904 NPN Transistor. Note base lead in the middle.https://n2htt.radio/wp-content/uploads/2015/01/mpf102.pngMPF102https://n2htt.radio/wp-content/uploads/2015/01/board2board3.jpgBoard #2 and Board #3Every alligator clip lead I could find.https://n2htt.radio/wp-content/uploads/2015/01/afstagev2andrfstagev1.pngAF Stage V2 and RF Stage V1First try. https://n2htt.radio/wp-content/uploads/2015/01/afstagev2.jpgAFStageV2AF Stage V2https://n2htt.radio/wp-content/uploads/2015/01/lm386_dead.pngLM386_deadIt's dead, Jim2016-02-07T20:13:08+00:00monthlyhttps://n2htt.radio/2015/01/14/but-wait-theres-more/2015-01-27T19:12:19+00:00monthlyhttps://n2htt.radio/2014/12/04/the-michigan-mighty-mite-oscillating-not-liberated/2014-12-04T05:16:13+00:00monthlyhttps://n2htt.radio/2014/09/06/chasing-a-bug/https://n2htt.radio/wp-content/uploads/2014/09/ad_photo.jpgad photoOriginal ad photo of my Vibroplex bughttps://n2htt.radio/wp-content/uploads/2014/09/homebrewbugweightcloseup.pngHomebrew Bug Weight CloseupCloseup of homebrew weighthttps://n2htt.radio/wp-content/uploads/2014/09/vibroplexchampionbugwithhomebrewweight.pngVibroplex Champion Bug With Homebrew WeightMy "new" bug, hobbled and ready to use.2014-09-07T02:23:29+00:00monthlyhttps://n2htt.radio/2013/11/21/getting-started/2014-08-31T15:53:39+00:00monthlyhttps://n2htt.radio/2013/11/22/you-probably-already-know-this/2014-08-31T15:52:42+00:00monthlyhttps://n2htt.radio/2013/11/24/there-are-lobsters-in-the-woods/https://n2htt.radio/wp-content/uploads/2013/11/tt2_n2htt.jpgtt2_n2httThe Original TT2 being held gingerly by N2HTThttps://n2htt.radio/wp-content/uploads/2013/11/tt2_w1fb.jpgQST May 1976The Original May 1976 QST Coverhttps://n2htt.radio/wp-content/uploads/2013/11/door_number_2.jpgN2HTT CampusDeluxe sleeping and ham radio operating accommodations.2014-08-31T15:52:03+00:00monthlyhttps://n2htt.radio/2013/12/09/a-fist-full-of-distros/2014-08-31T15:51:30+00:00monthlyhttps://n2htt.radio/2013/12/13/the-serial-ports-dark-secret-and-why-you-should-always-have-a-plan-b/https://n2htt.radio/wp-content/uploads/2013/12/20131213_180923.jpg20131213_180923https://n2htt.radio/wp-content/uploads/2013/12/my_groups_only_dialout_annotated.pngmy_groups_only_dialout_annotatedhttps://n2htt.radio/wp-content/uploads/2013/12/explain_sudoers_anotated.pngexplain_sudoers_anotatedhttps://n2htt.radio/wp-content/uploads/2013/12/ttyusb0_annotated.pngttyUSB0_annotatedhttps://n2htt.radio/wp-content/uploads/2013/12/ttyusb0.pngttyUSB02014-08-31T15:50:58+00:00monthlyhttps://n2htt.radio/2013/12/21/whats-in-your-shoe-box/https://n2htt.radio/wp-content/uploads/2013/12/running__tqsl_ss.pngrunning__tqsl_sshttps://n2htt.radio/wp-content/uploads/2013/12/just_menu.pngjust_menuhttps://n2htt.radio/wp-content/uploads/2013/12/a_setting_icon_ss.pnga_setting_icon_sshttps://n2htt.radio/wp-content/uploads/2013/12/creating_launcher_ss.pngcreating_launcher_sshttps://n2htt.radio/wp-content/uploads/2013/12/a_which_tqsl_annotated.pnga_which_tqsl_annotatedhttps://n2htt.radio/wp-content/uploads/2013/12/crotontopoqsl_eqsl1.jpgCrotonTopoQSL_eqslhttps://n2htt.radio/wp-content/uploads/2013/12/build_script_ss_annotated.pngbuild_script_ss_annotatedhttps://n2htt.radio/wp-content/uploads/2013/12/libdbd_ss.pnglibdbd_sshttps://n2htt.radio/wp-content/uploads/2013/12/cmake_ss_annotated.pngcmake_ss_annotated2014-08-31T15:50:22+00:00monthlyhttps://n2htt.radio/2014/01/26/above-all-else-do-no-harm/https://n2htt.radio/wp-content/uploads/2014/01/socket-mount-with-insulation.pngsocket-mount-with-insulationDetails of socket mounted in ventilation slot.https://n2htt.radio/wp-content/uploads/2014/01/socket.jpgFT-243 socketFT-243 sockethttps://n2htt.radio/wp-content/uploads/2014/01/ft-243.jpgFT-243 CrystalFT-243 Crystalhttps://n2htt.radio/wp-content/uploads/2014/01/coax-in-crystal-socket-3.pngcoax-in-crystal-socket-3Detail of coax to board socket attachment.https://n2htt.radio/wp-content/uploads/2014/01/ac-1-jr-sporting-new-ft-243-crystal-socket.pngAC-1 Jr sporting new FT-243 crystal socketQRV with FT-243 on 7.0532014-08-31T15:49:12+00:00monthlyhttps://n2htt.radio/2014/02/13/conky-pi/https://n2htt.radio/wp-content/uploads/2014/02/tzdata.pngReconfigure Time ZoneReconfigure Time Zonehttps://n2htt.radio/wp-content/uploads/2014/02/mint_sys_settings.pngMint System Settings - AutostartMint System Settings - Autostarthttps://n2htt.radio/wp-content/uploads/2014/02/mint_startup.pngMint Startup DialogMint Startup Dialoghttps://n2htt.radio/wp-content/uploads/2014/02/mint_conky.pngmint_conkyhttps://n2htt.radio/wp-content/uploads/2014/02/full_screen.pngfull_screenhttps://n2htt.radio/wp-content/uploads/2014/02/crunchbang.pngCrunchbang ConkyCrunchbang Conkyhttps://n2htt.radio/wp-content/uploads/2014/02/conky_auto_dlg.pngConky Auto Start ConfigConky Auto Start Confighttps://n2htt.radio/wp-content/uploads/2014/02/close-up.pngclose-up2014-08-31T15:48:07+00:00monthlyhttps://n2htt.radio/2014/02/24/not-exactly-a-post/2014-08-31T15:47:20+00:00monthlyhttps://n2htt.radio/2014/03/15/holes/https://n2htt.radio/wp-content/uploads/2014/03/parts-layout.jpgparts layoutParts layout sketchhttps://n2htt.radio/wp-content/uploads/2014/03/xmtr_cover_page.pngxmtr_cover_pagehttps://n2htt.radio/wp-content/uploads/2014/03/step_drill.jpgstep_drillKlein step drillhttps://n2htt.radio/wp-content/uploads/2014/03/osc_scope.pngosc_scopehttps://n2htt.radio/wp-content/uploads/2014/03/hardware-mounted.jpghardware mountedHardware mounted on chassis.https://n2htt.radio/wp-content/uploads/2014/03/crystal-checker-manhattan-style.jpgcrystal checker manhattan styleA crystal checker, built Manattan stylehttps://n2htt.radio/wp-content/uploads/2014/03/bare-chassis-front.jpgbare chassis frontHoles, from the fronthttps://n2htt.radio/wp-content/uploads/2014/03/bare-chassis-back.jpgbare chassis backHoles, from the back2016-09-24T19:44:07+00:00monthlyhttps://n2htt.radio/2014/04/06/you-cant-get-there-from-here/https://n2htt.radio/wp-content/uploads/2014/04/behemoth.jpgThe BehemothThe Behemothhttps://n2htt.radio/wp-content/uploads/2014/04/wiring_layout_sketch.jpgWiring SketchOne of many wiring sketches.2014-08-31T15:45:31+00:00monthlyhttps://n2htt.radio/2014/04/15/tanked/https://n2htt.radio/wp-content/uploads/2014/04/my-w1ts-transmitter.jpgMy W1TS Transmitterhttps://n2htt.radio/wp-content/uploads/2014/04/hc49_crystal.pngHC49 Crystalhc49_crystal2014-08-31T15:44:58+00:00monthlyhttps://n2htt.radio/2014/07/20/kx1-to-the-field/https://n2htt.radio/wp-content/uploads/2014/07/home-brew-deck-edited.pngHome Brewed KX1 Operating BoardHome Brewed KX1 Operating Boardhttps://n2htt.radio/wp-content/uploads/2014/07/dummy-cells-in-holder.jpgDummy cells in AA holderDummy cells in AA holderhttps://n2htt.radio/wp-content/uploads/2014/07/dummy-aa-cell.jpgDummy AA CellDummy AA Cell2014-08-31T15:44:20+00:00monthlyhttps://n2htt.radio/2014/08/31/aerial-ballet-with-spongebob/https://n2htt.radio/wp-content/uploads/2014/08/kx1_lithium_batteries.pngKX1 sporting new Lithium ion internal batteries.https://n2htt.radio/wp-content/uploads/2014/08/spongebob_in_tree.pngRare image of SpongeBob deployed in treehttps://n2htt.radio/wp-content/uploads/2014/08/rbn_40m.pngReverse beacon network posts on 40 metershttps://n2htt.radio/wp-content/uploads/2014/08/operating_position_set_up.pngOperating position, all set uphttps://n2htt.radio/wp-content/uploads/2014/08/spongebob_on_end_of_antenna.pngspongebob_on_end_of_antennahttps://n2htt.radio/wp-content/uploads/2014/08/pole_guyed_out.pngMast guyed out.https://n2htt.radio/wp-content/uploads/2014/08/guy_ring_closeup.pngClose-up of guy ring on masthttps://n2htt.radio/wp-content/uploads/2014/08/guy_ring_components.pngguy_ring_componentsGuy ring components.https://n2htt.radio/wp-content/uploads/2014/08/guy_kit_packed_up.pngGuy kit all packed uphttps://n2htt.radio/wp-content/uploads/2014/08/antenna_wire_passed_thru_swivel.pngAntenna wire running through swivel on mast2017-05-26T12:00:14+00:00monthlyhttps://n2htt.radiodaily1.02023-05-07T23:34:44+00:00