Categories
-
Recent Posts
Search posts
- Follow 73, de N2HTT on WordPress.com
Category Archives: Ham Radio
J-38 Madness
As I mentioned last post, the SKCC Weekend Sprintathon for October was all about keys. I heard all kinds of keys on the air during that contest, and many of them were J-38 keys. The J-38 is the quintessential, all … Continue reading
Posted in Ham Radio
Tagged Amateur radio, CW, ham radio, J-38, Lionel, Morse code, SKCC, Straight Key Century Club, Weekend Sprintathon, WES
8 Comments
2B Redux
My infatuation with boat anchors has begun to reassert itself this summer, with the sudden acquisition of a Drake-2B receiver. I like working with separates: a tube transmitter like the W1TS Simple Transmitter or the QRP Blowtorch, and a vintage receiver … Continue reading
Posted in Ham Radio
Tagged Amateur radio, boat anchor, building, CW, Drake 2B, eBay, Hakko 808, ham radio, Hayseed Hamfest, Hickok 6000a, PCARA, Radio, receiver, tube checker, tube tester, tubes, vintage radio
2 Comments
The QRP Blowtorch Rides Again
Summer in the Northeast is the perfect embodiment of the 80 / 20 rule: we get 80 percent of our outdoor activities in during the 20 percent of the year when the weather is nice. We really are having a … Continue reading
Posted in Ham Radio
Tagged Amateur radio, building, ham radio, Homebrew, low power, MOPA, PCARA, QRP, QRP Blowtorch, QRP operation, Radio, transmitter
6 Comments
The other display.
Back in March, around the time I had received my SI5351 breakout board kit from EtherKit, I ordered a new Arduino board to use with it. I knew I would need some kind of display, but to date had not … Continue reading
Posted in Arduino, Ham Radio
Tagged 3 band vfo, Amateur radio, Arduino, ham radio, I2C, LCD, LiquidCrystal_I2C, si5351, ssd1306, U8glib, VFO
3 Comments
More software, less radio.
My recent foray into the world of software defined radio, the SI5351 based 3 Band VFO (3BVFO), has been a fun project so far, but I have to observe that since it is mostly software, it is mostly acting like … Continue reading
Posted in Arduino, Ham Radio
Tagged Amateur radio, Arduino, ham radio, si5351, ssd1306, U8glib, VFO
Leave a comment
Not a tube project, version 1.1
This is just a brief update to last week’s post about the 3 band VFO sketch for the Si5351 breakout board and Arduino. Software never stands still…. Working with Joel Caulkins, KB6QVI, who generously expressed an interest in the sketch … Continue reading
Definitely not a tube project.
Lately I have been having lots of fun working on a variety of different bench projects, all involving very different technologies, switching between them as parts arrive and time allows. I have been experimenting with space charge tubes, with the … Continue reading
Posted in Arduino, Ham Radio
Tagged Amateur radio, Arduino, breadboard, building, construction technique, CW, etherkit.com, ham radio, Homebrew, Mega 2560, OLED, QRP, Radio, si5351, ssd1306, transmitter, VFO
12 Comments
Is there a pentode in the house?
I’ve had a little ham radio down time, as this relentless winter rewarded me with a late winter virus that laid me low for a few days. But, back on my feet and at the bench again, with some new … Continue reading
Posted in Ham Radio
Tagged 12EZ6, Amateur radio, building, common cathode, ham radio, Hickok 6000a, Homebrew, pentode, Radio, receiver, regenerative receiver, RF amplifier, tube tester
Leave a comment
Mysteries of the Triode Revealed.
Update: My understanding of inter-electrode capacitances was incorrect as described originally in this post, and I wanted to set the matter straight before I confuse someone else: The small inter-electrode capacitances in the tube present less and less reactance as … Continue reading
Posted in Ham Radio
Tagged 12SN7, Amateur radio, building, calcualtor, construction technique, ham radio, Homebrew, programmable caculator, receiver, regen, regenerative receiver, TI 83+, tube
Leave a comment
73, de N2HTT 