I have a Texas Star DX500 (non variable) amp that I have been running for about 6 years now, trouble free. Recently, the amplfier would throw the SWR's off the scale when turned on. I have checked all grounds, changed coax jumpers and coax to antenna, checked the antenna mount, etc, and found no issues. I also bought a new meter, and it reads high as well. Took the amp to a local tech, and he saw the same thing on his bench.
He does not have a spectrum analyzer, but said it looked to be throwing harmonics out and this was causing the high SWR's. He could not find any caps or resistors that were blown or out of spec. Nothing appears heated/burned inside the amp. The matching network in the amp tested ok. Not sure where else to look, and I am trying to have this fixed locally to avoid shipping charges. Any ideas where else to look for the problem causing the high SWR's?
73,
RT307
He does not have a spectrum analyzer, but said it looked to be throwing harmonics out and this was causing the high SWR's. He could not find any caps or resistors that were blown or out of spec. Nothing appears heated/burned inside the amp. The matching network in the amp tested ok. Not sure where else to look, and I am trying to have this fixed locally to avoid shipping charges. Any ideas where else to look for the problem causing the high SWR's?
73,
RT307