Andrew, I definitely can heart an increase in noise when I power up the preamp and also see an S-meter response. Unfortunately I have absolutely no terrestrial repeaters within my range on 70cm. I've never been able to get into one even back in the days when I had my TS-2000X. Never been able to hear them either. Checked the preamp cables to make sure they weren't backwards also. In reference to some questions from others I've had, I am compensating for doppler on receive and I've checked all my cables except for the 40 foot piece of LMR 400 for open or short with an ohmmeter. Just for giggles I decided to see if I could copy NOAA weather on 162 Mhz band and I can. Don't know if that means anything. I will check my antenna pointing. Getting an accurate fix on true north has sort of been my achilles heel before but I've managed.There is not that much declination here. When I did happen to pick up the brief SO-50 transmission last night the rotator was making a fairly large change in Azimuth though. I may just whip up a quick little groundplane to give me a baseline as someone suggested also. Thanks for all the responses I've gotten so far. Michael Andrew Glasbrenner wrote:
Do you hear a noise increase when you power up the preamp? If not, are you sure you are getting power to it? Can you hear terrestrial repeaters, and does the signal change when you cycle the preamp power?
Check your ins and outs on the preamp to make sure they didn't get reversed. Same thing for any diplexer you may be using as a high pass filter.
More of the obvious...sure you are tracking correctly, and at the right time?
I wouldn't suspect any of the cabling or adapters other than one being flat out broken. The preamp should easily overcome any shortcomings of the cable you've described.
73, Drew KO4MA
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