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There are two methods to improve the AMC, you can change R130 (a 1.5KOhm for a 500 Ohm, it may be in a diode location close to TR26)
Or you can add a 1K resistor in series on the the middle leg of TR24, to do this just cut the track for the leg and put the resistor across the cut.
2. Change R126 (10k) to a 4.7K
3. Change R124 (10k) to a 4.7K
4. Re-tune L37 and L38 for maximum AM forward power.
I know of a few different ways to get more audio, other than those listed for search on the web. 148s can be audio monsters, but you won't see much in the wattage department. Nevertheless, you want to stay away from any mod that wants you to clip a limiter in this chassis radio.
Hello gentlemen and Ladies. I have the dreaded RCI-2990 receive issue where my radio gets distorted when people get close to my location. I found the C90 Capacitor, but I can not for the life of me find the C89 capacitor. Can or does anyone have a picture of the exact location of C89 ? Thank you in advance, Wes
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