Hello,
I'm hoping to get some help from experienced CBers. I have a Galaxy DX-949 that intially had no TX in AM or SSB. The balanced modulator IC was bad and after replacing it, the AM TX returned to normal. The USB and LSB also work but modulation appears low and USB has about 1W of RF power shown on the meter with keyed mic and no modulation. The LSB also has carrier leakage but much lower level. I've performed the alignment procedure (it adjusted fine) and adjusted VR6 for lowest carrier level but can't get it below 1W. I'm told the DX-949 is typically "clean" so I'm thinking this leakage is abnormal. I've been over the various circuits several times but can't improve the leakage. Would greatly appreciate any and all help. Thank you!
I'm hoping to get some help from experienced CBers. I have a Galaxy DX-949 that intially had no TX in AM or SSB. The balanced modulator IC was bad and after replacing it, the AM TX returned to normal. The USB and LSB also work but modulation appears low and USB has about 1W of RF power shown on the meter with keyed mic and no modulation. The LSB also has carrier leakage but much lower level. I've performed the alignment procedure (it adjusted fine) and adjusted VR6 for lowest carrier level but can't get it below 1W. I'm told the DX-949 is typically "clean" so I'm thinking this leakage is abnormal. I've been over the various circuits several times but can't improve the leakage. Would greatly appreciate any and all help. Thank you!