Thread: FRG7 Mod
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Old 15th Jan 2022, 7:03 pm   #9
Wendymott
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Join Date: Jun 2013
Location: Huddersfield, West Yorkshire, UK.
Posts: 1,548
Default Re: FRG7 Mod

Hi Peter. I originally used a Toko 421 coil that had been used for a 455Khz I.f No additional cap. It refused point blank to operate, after lots of winds and rewinds, I used some fixed RF chokes... finishing up at 150uH... and a 470pf.. Incidentally I had removed the input filter and fed the chip from my Anritsu generator. So thats where it finished up....I had the TBA120U in stock, plus the MC3357, which is a dual conversion IC. But I decided the MC3357 was overkill, I already use the MC in my new 2 M multimode radio project. OK about the article..... I already have that and I based my version on that data sheet, but thanks
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Regards
Wendy G8BZY

Last edited by Wendymott; 15th Jan 2022 at 7:04 pm. Reason: Additional text
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