Total posts : 45366
As mentioned befor, out of the few THs that I have personally owned, only two were messed up audio wise, I buy these through ebay so who knows what the transmitters were subjected to or whos hands were in them that may have had something to do with the messed up audio. Also I have found that good quality audio going in gives good quality audio comming out. In addition even though these units are supposed to have built in AGC or some kind of limiter the circuit if so, it is dosent seem to respond like any limiter or AGC I have come across, it must be more of a limiter than an AGC and hard for me anyway to tell when it starts clamping down, maybe if I saw the modulation envelope on a scope it would be more apparent. All I can say is once I set up an outside antenna, and had it propely tuned, I got rid of a lot of bad audio on no matter what AM brand of transmitter I am using. I have the Ramsey AM 1, AM 25, Panaxis AM 1, Knight kit Broadcaster, Various TH models, an older Graymark transmitter. I have found It really helps to get the antenna outside away from the transmitter no matter what the transmitter is, and probably a better help to get the audio away from the transmitter as you may have found if you put the transmitter out by the antenna, althought I have had good luck running a short lenght of coax to the antenna. As far as the TH ATU, get one if you can find one, excellent turn key antenna/tuner system, but you can acheive the same range with a whip and good loading coil so nothing magic about the TH ATU, but very nice system easy to use ready to go no hassle. I have one , tested it ,impressed by it, save it for special applications, but still use a short long wire with loading coil for the home staton. Would like to add more but I am sure there are thousands of listeners out there wating for me to go on the air so have to “tune up” for the morning show!