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What is the best way to align (or check the alignment) of a FC390 or FC357 ?

I have heard a few different ways.... service manual says to hook it up to a known good radio and just adjust it to read correctly...

I have thought of maybe playing a tone (or even music) through one radio and tuning it in on a radio you trust... but again that would not be a perfect alignment... basically ear tune it

any better ideas?

[QUOTE="mr_fx, post: 362209, member: 22137"] What is the best way to align (or check the alignment) of a FC390 or FC357 ? I have heard a few different ways.... service manual says to hook it up to a known good radio and just adjust it to read correctly... I have thought of maybe playing a tone (or even music) through one radio and tuning it in on a radio you trust... but again that would not be a perfect alignment... basically ear tune it any better ideas? [/QUOTE]

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