GM300 Audio Problem

[Max]

Hi
I have 2 GM300 UHF radios.When I rx on both radios,and turn the volume up I get what sounds like feedback.
I have tried changing freq and added tones etc....just to see if anything would make a difference.
Has anyone heard of this problem with the GM300 radios before ?
Any help is greatly appreciated.

Max

[jackhackett]

Sounds like the feedthru connector (the pins that connect the RF and logic boards) is bad.

see here:
http://batboard.batlabs.com/viewtopic.p ... ru#p392502

[Max]

I took both radios apart and most of the screws where loose on both boards,I tightened them down and seems to have cleared up the problem.
Thanks for the help.

Max

[jackhackett]

Just bear in mind that if they are the old style connectors you're going to keep having problems until they're replaced.

[Will]

You may have a microphonic receiver VCO, a known problem in some GM300.

Try the receiving test with an external speaker.

[Max]

Tried with both internal and external speakers, with just tightening the screws on both boards it seems to have fix the problem.

Max