At Finger I rescued this modified Kosmos XN baseplate. Interesting idea to modify them into something more useful. They sure do make for a nice test fixture. Been wondering what the circuit is.
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9 pin noval with pin 9 not connected. 12V heater voltage, so if it's a 6.3V tube, it must have two heaters that can be connected in series. That and the pinout already suggest a double triode like the ECC81, 82 or 83. The varicap and ten turn pot must be part of some form of tuned RF circuit. So maybe an oscillator or filter. The screw terminals look like they would house a big air wound coil with tap. The transformer lives at the anode side of the second triode, if it's a double triode tube. It's too clunky to pass through any RF, so that rules out it being an oscillator+buffer. Instead the second triode looks like an audio stage. That made me think audion style receiver.
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And indeed. Someone was making and selling these in the 2000s. Clone of the Kosmos Radiomann electronics kit that saw a re-release around that time.
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Bun's Lab
Let's celebrate my one year mark of HRT with a nice box of Proggers lmao
Wew, that week was tough. That stuff makes me sleepy af. I'm pulling through though, trying out different things
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Summerboat party at Eurofurence 29