All this talk about TRF's and regens has really motivated me to try and build one. After all, theyre supposed to be simple. So, earlier today i went to Wilcos and bought a baking tray (hhhm i mean shassis
) ).
Normally when i do thigns like that i do abit and then get bored and go do something else. But for some reason i was motivated today, so i managed to nearly build one. All thats left is the wiring round the pentode regen detector thing.
Hers a couple of pics.
(BTW you may notice that thers a 6SN7 there...but thers supposed to be a 6SJ7. Thats only there because i wanted to make sure the valve plugged in ok, and thats the only octal i had handy).
The bad quality pic has the tuning coil (vanish still abit wet!) on it. I wount it on the inside tube of a toilet roll (classic!) and used very thi wire scavanged from a transformer.
Anyway, i hope to finish the wiring tomorrow and maybe fire it up.
The brass stud sticking out of the shassis is the tuning cap. Its the only place i could put it. Abit un-othodox maybe, but i dont mind. I dont think i'll bother with any kind of scale or anythign, just a knob.
There will also be a volume, reaction and possible tone pot sticking out the front.
i'm pretty impressed. Normally it takes me longer to do stuff like this.