Two Tube Superheterodyne Receiver
This was my first Superhet project. I used this in the 2008 winter 1AD Contest held annually by the Birmingham Alabama Crystal Radio Group: More info...
One Tube Direct Conversion Receiver
This project makes interesting use of the unique characteristics of a 6JH8 beam deflection tube. I used this in the Summer 2008 Homebrew DX contest: More info...
One Tube Reflexed Superheterodyne Receiver
Based on a 6ME8. Not a multi-section tube, but just a single active device that can drive a speaker on
DX
More info...
Vintage Style 3-Tube Superheterodyne Receiver
Uses 1930’s era battery tubes
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One Tube AM Broadcast Transmitter
Screen modulation with carrier control Uses a 6M11 Compactron 3-section tube
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Improved One Tube AM Broadcast Transmitter
Screen modulation with carrier control Uses a 6CQ8 2-section tube
More info...
3 - Tube AM-Stereo Broadcast Transmitter
Yes, it really is possible!
No IC's; no transistors; just three tubes.
Uses two 6CQ8's and one 6HA5.
More info...
Low Parts Count Nixie Display Driver
Two chips and a few passive components:
More info...
There’s now an Arduino version:
More info...
FM Crystal Radio
A true frequency discriminator circuit
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Mystery Crystal Set
An ever popular design
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Tube Audio Amplifier
A low power amplifier to drive desktop speakers
More info...
General Purpose Controller For AD9850/51 DDS
Direct Digital Synthesis Frequency Generator. Direct frequency entry to 1 Hz resolution, and a sweep function: More info...
Other Projects:
- A very simple DDS controller
- Construction of a tuned loop antenna for the MW band
- Matching a short antenna to a low power transmitter
- 455 kHz IF alignment signal generator
- Switch-Mode B+ Power Supply
- Battery Current Sensor for the above B+ Supply
- Add a filament winding to a transformer
- Magic Eye Tube Solid State Replacement
- Low Budget Surface Mount Parts Installation