Instructables

Glowbugs - Homebrew Tube Amateur Radio Transmitters and Receivers

Picture of Glowbugs - Homebrew Tube Amateur Radio Transmitters and Receivers
4064339322_cd95107b33.jpg
4063581341_34a06c6ca0.jpg
4134743470_f9c346e071.jpg
4133975115_e785d00e74.jpg
4134745386_489b337d0b.jpg
4133987793_77c7373dca.jpg
4134009271_4f8dfee728.jpg
4208399672_62ef86f78a.jpg
4134759770_225c69d685.jpg
3t_tube_transceiver.jpg
Glowbugs - homebrew (DIY) tube gadgets, receivers and transmitters, dedicated to the Golden Era of Amateur Radio. Generally, any small, home-built tube-type transmitter or receiver may be referred to as a glowbug. The majority of glowbug transmitters are designed to be used in the CW radiotelegraphy mode. www.squidoo.com/glowbugs
wd4nka1 year ago
Andy, your stuff is always so awesome. One day, I need to print up some vintage Letterpress QSL cards for you, to go with your vintage station. Hey! I just came across the carcass of an old Grundig Majestic. Perhaps I can salvage the transformer and filter choke, toss a few filter caps, a 5U4, and rig up a 6AG7 / 6L6 MOPA to couple with my HRO-5 that I hope to re-cap.
Johenix1 year ago
Andy, UU1CC, I assume that is your call sign?
I have a small interest in Glowbugs.
I found an old "QST" article about a home brew, two band Reciever (80 & 40 M) from April 1941. Principle seems sound even though it uses a "C Battery" for bias- 6V AC for filaments.
I would like to rebuild it or something similar using a 1U5 and a 1R5 so I could be completely battery powered. I probably would use a "B Battery" of AA pen light cells.
Worst kit I have found from the 1950's was a ONE TUBE ham station offered (for about $15) by a one man company in Kearney, Nebraska. It was 1/2 triode oscilator transmitter, 1/2 triode Regenerative reciever. You were lucky to be heard across town. A PI network to match it to the antenna might have helped it to get out better.
I was thinking of using a tube like that double triode as a push/pull crystal oscilator transmitter.
I also have plans for an early 1950's camper's 2 tube superhet reciever ( 1U5, 1R5) from "Popular Mechanics" magazine.

Oh, yes, my call is KC0KBG.
M0HIZ2 years ago
Very nice - there should be more ham radio stuff on Instructables.
RangerJ M0HIZ2 years ago
Amen. It seems like a perfect place for ham projects.
welder guy2 years ago
I like it! This is the true spirit of HAM radio! I have to make one of these soon!

-KC2VDM
can any body tell me how to make a fm radio????????
The biggest issue for a FM receiver is the detector stage, and a limiter. The limiter stage is simply an amplifier that is followed by a diode clipper stage. Insertion of these 2 stages into an AM radio will net you a FM receiver. Schematics for FM detectors, and limiters abound on the Internet, so a google search should net you what you need. If you can follow a schematic, then you should do quite well with this project.
IC versions of these radios are also very common, and readily available.
thanks for the reply
robot7973 years ago
I LOVE TUBES
electricfan4 years ago
what tubes do you use? I'm preaty sure there is a 6l6 there
Andy UU1CC (author)  electricfan4 years ago
You're right - it is early Russian 6L6-GB's clone - 6P3 http://timelesson.blogspot.com/2010/02/6p3-beam-power-tetrode.html
6P3-6P3S-Beam-Power-Tube.jpg
me4 years ago
nice, it has a steampunk look to it, I like it, you should really post a how to...
Andy UU1CC (author)  me4 years ago
Thank you, but I'm so unfamiliar with all these "howtos" - I'm Instructable newbie, just second day here. Take a look at timelesson.blogspot.com/2009/01/straight-key-night-mopa_01.html and timelesson.blogspot.com/2009/12/evergreen-exciter-for-special-night.html
Phil B4 years ago
Did you use published circuits, or design your own?
Andy UU1CC (author)  Phil B4 years ago
Hi there. Using my own - it is The Main Rule :-)