skipp025 wrote: >> Sorry to read the above comment ... I've always had good luck > and a lot of great learning experiences with Hamtronics gear. > Dealing with Jerry at Hamtronics is sometimes a pain but other > times he can be a very nice guy.
I recently called them and a woman answered. It sounded like she was in a factory. She told me that all correspondence is now done by email. They did respond to my email message in a timely fashion, but it looks like there is no longer a human person to talk to on the phone. > > Then you simply inject the ctcss tone > output from the TS-32 board direct to the transmitter > This is another problem area in the Hamtronics transmitters. You can only get about 300Hz of deviation for the PL tone. Some ham rigs need a little more than this to decode the PL. There is a fix for this on the Repeater Builder site. > > > TA51 transmitter. Here is the real problem. I can only get > > 2.5Khz deviation of clean 1000Hz audio out of the transmitter. > > I can push it to 3Khz, but it gets distorted. > > Using the same TA-51 tx board... I don't have that problem. The TA51 TX board comes in many band options. Only the 6 meter board has this problem. Is yours the 6 meter board? > > > Looking at the manual for the TA51 6 meter version, I see a note > > that states the following: "Because the fundamental frequency > > is only multiplied by 6 (instead of 12 for 144 MHz), the frequency > > deviation is only 1/2 of what it would be on high-band. > > Hence the reason many low band transmitters need much more audio > drive energy. I took it to my friends house for a second opinion and we drove the input to the first multiplier with a clean 1000Hz sinewave signal. We were not able to get more than 3Khz of deviation confirming what Hamtronics stated. How did you do it? > > > Therefore, it may not be possible to obtain a full ±5 kHz > > deviation with modulation without a little distortion. This > > should not be objectionable though." > > The distortion Hamtronics is talking about is probably not what > you are or have experienced. The distortion I actually hear from > my TA-51 exciter board is not very much at all. In many cases > only a trained ear might object to the typical phase modulator > distortion. > The distortion is acceptable at 2.5Khz deviation, but not at 3Khz. I have had the 144Mhz and 220Mhz versions of this board and never had this problem. 73, Joe, K1ike
