Turn the Repeater Power Down to 20 watts output. Borrow a 3dB
attenuator that will handle 15 watts and intert it in the line
between the rf pa and the duplexer. Test the system again using
weak signals (run around your normal locations with ht's).
Less the reduced repeater transmit power out, tell me/us if the
desense the same goes away, or is much reduced.
cheers,
skipp
www.radiowrench.com/sonic
> "rtoplus" <[EMAIL PROTECTED]> wrote:
> Hi Steve
>
> I haven't had a chance to remove the pre-amp. Here's the story...
>
> My handy-dandy motorola tech came to the site about 3 months ago
> to "help". He told me I had about 6db-10db of desense according to
> his zillion dollar service monitor. He was wanting to sell me a
> used Celwave 5042-1 duplexer he had. He offered it to me for a good
> price...$600.00 so I bit and we hooked it up and tuned it. I asked
> him about the preamp and he said I should leave it in place. I said
> OK and he went on his merry way. A ham buddy of mine and me then
> took off in different directions to check out the "new" system. The
> desense was worse than ever!!!! Just a few miles from the site, any
> attempt to use the repeater caused the repeater transmitter to key
> on and off constantly. Next day, I went back to the site, removed
> the celwave and put the sinclair back on...problem went away. I got
> home and looked up the specs on the celwave and lo and behold, the
> sinclair had much better specs. The radio tech blamed everything on
> the antenna I have, which I know causes some problems, but like I
> said in an earlier post, my options are somewhat limited (any
> suggestions in this area would be welcome!).
>
> Needless to say, I've not used this guy again.
>
> Anyway, I haven't removed the preamp. If I do remove it, does the
> receiver need to be retuned? That's one reason I've not removed it
> cause its a bit tough to get my equipment to the site if retuning is
> needed.
>
> Thanks
> Bob, GMRS WPVV845, Amateur KG4WAD, LMRS WPXC892
>
>
> --- In Repeater-Builder@yahoogroups.com, "Steve Bosshard"
> <[EMAIL PROTECTED]> wrote:
> > Does it de-sense without the pre-amp?
> > Steve
> > NU5D
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