HF radio has no side tone & no transmit. A/C has just been mod' for low power color radar.Took all boxes out & repl one at a time-no help. swapped y cables no fix. swapped KYV5 switching relays no fix. swapped R/T mounts no fix.Checked IJB terminal 61 wr # 1z10a22, 1z10b22, c22 and 62 wr #h22. Any Help would be appreciated!