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Old 9th Jul 2018, 8:54 am   #30
tamemin
Triode
 
Join Date: Jul 2018
Location: Oxfordshire, UK.
Posts: 34
Default Re: Mystery 1930s 3 valve battery radio chassis

** Some Success**

Well, I tried to rule out possible noise from my LT power supply last night, and replaced it with 2 D cells and a power diode (or two), which gave me about 1.8v under load.

Anyway, the radio seems to pick up quite a few channels on MW (five live is quite clear) Which is great. The regen and tuning seem to work quite well, although there does seem to be a constant 12-16 khz on the audio out on some channels, I guess maybe that's the nature of the beast?

So I guess, the challenge now, is to make a nice clean 2V supply, and 90v supply. I've ordered some dc-dc buck converter modules from ebay, but I suspect these are going to be really noisy and cause the same problem as before. I'm hoping to power the whole thing from a single 12v plugin power supply.

Tam.
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