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President Grant DX is staying in transmit mode even with microphone and cord unhooked from radio. It has the 999 board. When turning radio from off to on, it takes about a second then goes into transmit mode, also I can heard what sounds like a roger beep tone, which stays on continuously...

I've a Sear Roadtalker 40 SSB base model 934.38310700 that has an issue with AM receive only, SSB LSB and USB receive works great. When the switch is turned to AM, the volume drops down to next to nothing. It's like to volume slide switch isn't working. The receive voices are barely heard...

1994 Malaysia made 148 GLT was working fine, but switched from AM to LSB, and the channel light dimmed, then completely went out over about 4 seconds. Now no sound or channel light on LSB, no tx on my meter, the meter is still lit however. AM and USB work fine, good sound, good tx, channel...

Demon Cobra 25 WX ST It will turn on BY ITSELF and squeal like a stuck pig, with the on/off switch off. The on/off volume control has no bearing on it, one can switch it on or off, and the radio stays on and squeals. It does stop of course if I unplug the power cord, and then will act...

Thanks in advance for reading, and hopefully making some suggestions. I believe the radio is a 1995 year or close to it, with a EPT014810Z board. On side band, (both usb and lsb) it does not swing the meter needle on the radio, nor does it produce any needle swing on the swr/power meter (Radio...