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https://cbworldinformer.org/rci_2950dx_image_rejection_md.htm RCi always had crap receiver circuit.

Like this

I had plenty of radios older thatn 40 years, and never had to replace all capacitors. Sometimes a few faulty ones, but after diagnosis, not a coin toss. Anyway... @OP check AGC. Mike

What is next step if after recap is no difference? Isn't it better to diagnose before blindly replace radio components? Mike

You can't polish a turd. Leave it as it is. Mike

Yes, 1n4148

That's interesting... Bitching about direct sampling in 7300, but no one cares, that most of the 2/70 radios nowadays are even worst SDR's. Mike

Sorry guys, but external monitors without touch are useless. Mike

No longer manufactured. And they started with 7851 before SDR era. Mike

Frankly speaking (IC-7610) only OVF issues I had sporadically with OTH radar transmitting on nearby frequency, or while listening BC band with huge, over +40dB signals. In that case 6dB att does the trick. But first: https://www.qsl.net/ab4oj/icom/ic7610/gainmgmt.html I run high gain, narrow...

Only if you do not know how to use direct sampling SDR :) Mike

I usually replace dynamic with electret. Resistor/cap inside radio and problem solved. Mike

Maybe someone live nearby? https://www.qrz.com/db/KI5AYC

Aliexpress. Amazon, ebay too expensive for the same gear. Mike

I would check +5V leg 6 and 33 of IC502

All elements equally faded?

How you gonna control CC/CV stages? Better get proper charger. Mike

It is a tuned coil. You have to open it, count turns, then rewind with the same wire size.

From another radio. I would try to rewind it if not massacred too much. Mike

Congratulations. Always a thrill when working new one. Mike