Hello to All, I am presently working on a Hamtronics 6 meter repeater and am finding it quite disappointing. This repeater is owned by a local club and has had problems for the beginning.
R100 receiver. I have this working quite well, except for the fact that it only gives 100mv of audio to the controller. The NHRC controller I am using likes to see 1 volt of audio. I guess I might have to add a stage of amplification. 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. 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. 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." This seems totally unacceptable to me and it looks like it is not fixable. Trying to Phase Modulate the transmitter with more than 2.5Khz deviation causes it to distort and shift frequency. Also, the audio stages distort at the levels that hamtronics specifies at the test points. Only the first amplifier stage seems to run clean. Any comments? (except for "Don't buy Hamtronics!") I find this disappointing because I have had other Hamtronics that performed well, or very well, for the money. 73, Joe, K1ike
