UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post - FM to AM converter

paulsherwin · 27th Sep 2018, 11:59 am

I have one of the FM/MP3 modules, and I seem to remember it pulls about 20mA, so a PP3 isn't practical for long term use. It's fine with a spare wall wart of any reasonable voltage, as it has a regulator to provide 5V. I bought it to play MP3s on the hifi system, but it's redundant for that now, so I may try adding the MW oscillator if I can find the right inductors in the junk box. Presumably the 150uH inductor is basically a MW aerial coil. I can measure a few coils using my Chinese component analyser.

27th Sep 2018, 11:59 am	#7
paulsherwin Moderator Join Date: Jun 2003 Location: Oxford, UK Posts: 27,970	Re: FM to AM converter - variation on a theme! I have one of the FM/MP3 modules, and I seem to remember it pulls about 20mA, so a PP3 isn't practical for long term use. It's fine with a spare wall wart of any reasonable voltage, as it has a regulator to provide 5V. I bought it to play MP3s on the hifi system, but it's redundant for that now, so I may try adding the MW oscillator if I can find the right inductors in the junk box. Presumably the 150uH inductor is basically a MW aerial coil. I can measure a few coils using my Chinese component analyser.