This new kit from Hollow-State Designs is a complete “homebrew” thermatron VFO that covers the 40 meter amateur band from 7.00 to 7.20+ (the CW portion and much of the SSB/AM portion). In the spirit of our Thermatron Michigan Mighty Mite (MMM), this is a simple to build project with everything provided including all hardware, parts, even the superglue.
This VFO/LO is the first of our 3 kit DCR (direct conversion receiver), providing the receiver band tuning. The kit can also be used to supply a 4 Vp-p stable signal to a homebrew transmitter or as a LO in your next receiver project. It uses a common 6U8A pentode/triode. The pentode is the Hartley oscillator with a triode cathode follower. Like our TMMM, this kit was created to familiarize new and existing hams with simple thermatron (vacuum-tube) homebrew construction techniques.
This new kit from Hollow-State Designs is a complete “homebrew” thermatron VFO that covers the 40 meter amateur band from 7.00 to 7.20+ (the CW portion and much of the SSB/AM portion). In the spirit of our Thermatron Michigan Mighty Mite (MMM), this is a simple to build project with everything provided including all hardware, parts, even the superglue.
This VFO/LO is the first of our 3 kit DCR (direct conversion receiver), providing the receiver band tuning. The kit can also be used to supply a 4 Vp-p stable signal to a homebrew transmitter or as a LO in your next receiver project. It uses a common 6U8A pentode/triode. The pentode is the Hartley oscillator with a triode cathode follower. Like our TMMM, this kit was created to familiarize new and existing hams with simple thermatron (vacuum-tube) homebrew construction techniques.
