[amsat-bb] Re: Frustration

Michael Tondee mat_62 at netcommander.com
Sun Nov 29 17:21:58 PST 2009

 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.
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
> ------------------------------------------------------------------------
> No virus found in this incoming message.
> Checked by AVG - www.avg.com 
> Version: 8.5.426 / Virus Database: 270.14.87/2535 - Release Date: 11/29/09 19:31:00

More information about the AMSAT-BB mailing list