Got a return Cobra 148 GTL that I previously installed an RFX95HD on up on the desk today.
Issue:
Owner got long winded on it the first night he had it, and the amp got so hot that it wouldn't key up anymore. The power started fading from 110w down to nothing.
Evaluation:
Although it ran scorching hot, the amp still works perfect, it just needed to cool down.
After running it a bit, I decided to flip the amp off and run barefoot. Well, we have no output whatsoever barefoot, sidebands or AM, nothing. All I did to disengage the amp was removed the 8v transmit only wire and ran to a spst switch. I have the fan on another spst switch. When I flip the amp switch to ON position, the output is around a 15w key and swings up to 110w PEP (45w average). When I flip the amp switch to OFF position to run barefoot, I have no output whatsoever on any mode. But, if I take the output wire off the so239 center pin and run a jumper from the so239 center pin to the spot on the board where the so239 center pin suppose to go and flip the amp switch to OFF position, then the radio will transmit barefoot.
I'm thinking he got it so hot that it damaged one of the relays in the amp or something else in the amp is shot.
Any ideas guys/gals?
He said he's fine with it always on.
Issue:
Owner got long winded on it the first night he had it, and the amp got so hot that it wouldn't key up anymore. The power started fading from 110w down to nothing.
Evaluation:
Although it ran scorching hot, the amp still works perfect, it just needed to cool down.
After running it a bit, I decided to flip the amp off and run barefoot. Well, we have no output whatsoever barefoot, sidebands or AM, nothing. All I did to disengage the amp was removed the 8v transmit only wire and ran to a spst switch. I have the fan on another spst switch. When I flip the amp switch to ON position, the output is around a 15w key and swings up to 110w PEP (45w average). When I flip the amp switch to OFF position to run barefoot, I have no output whatsoever on any mode. But, if I take the output wire off the so239 center pin and run a jumper from the so239 center pin to the spot on the board where the so239 center pin suppose to go and flip the amp switch to OFF position, then the radio will transmit barefoot.
I'm thinking he got it so hot that it damaged one of the relays in the amp or something else in the amp is shot.
Any ideas guys/gals?
He said he's fine with it always on.