The Defpom Forum, for RadioMods, S&M Software and Music by The Defpom

I forgot, I get strong microphony.. Edit: I was looking the radio now, and have some more info. Without mic, I have the feed back, putting smeter up. Even with zero mic gain, it´s very low, but it´s present. With mic, If I put mic gain to zero, it stops the feedback, but I have a strong hum (like if...

Radio Make and Model: Cobra 148GTL SN: 13011503 PCB Number: PC412 PLL Number: MB8719 Test gear available: RF Gen. Fluke 20MHz Dig Scope, 4 1/4 + 3 3/4 True RMS digimeter, RF probe, Freq Meter, Tektronics 10MH analog Scope, etc.. Symptoms: Strong RX feedback when SSB selected (upper and Lower), S Met...