[Skimmertalk] Deaf QS1R

[Andy KU7T]

Bob,



I also transmit at same location but have a protector on the front end, and also a 10 db preamp. Preamp first, then protector.



CW skimmer does not complain about anything. Both check marks are green.

In fact I did my investigations in SDRMaxV and it all runs fine but without signals and just some strange birdies.

When I connect the CWSkimmer Server again, I get a jump from 4W to 9W when skimming all 7 bands (measured on the 110V side)

When I connect my skimmer antenna, it has about 100 decoders, when I disconnect the antenna, it stays about the same.



Is there something in the RF path that I could check? Is there a protection diode/fuse that could be blown?



Andy

KU7T



Sent from Mail<https://go.microsoft.com/fwlink/?LinkId=550986> for Windows 10



________________________________
From: Skimmertalk <skimmertalk-bounces at contesting.com> on behalf of Bob Wilson, N6TV <n6tv at arrl.net>
Sent: Thursday, December 20, 2018 4:50:44 PM
To: SkimmerTalk Reflector
Subject: Re: [Skimmertalk] Deaf QS1R

Sounds like it is beyond repair, especially if you ever transmitted on an
antenna at the same QTH, with no front end protector or "mute skimmer ant"
relay.  Were you using a 10 dB pre-amp too?

Do you see any error messages in CW Skimmer Server or does it appear to
connect and behave just fine, but with very few "decoders" listed.

If there are no messages in CW Skimmer Server, everything looks normal (two
green check marks at bottom left corner of SkimSrv UI) you should see the
DC current drawn by the QS1R go up significantly when you start CW Skimmer
Server, then go down when you exit, especially if skimming 7 bands x 192
kHz.

Chances are you should consider upgrading to a Red Pitaya + Transformer, or
wait for the new Red Pitaya to become available.

73,
Bob, N6TV

On Thu, Dec 20, 2018 at 3:54 PM Andy KU7T <ku7t at ku7t.org> wrote:

> Hi,
> I need some ideas. My QS1R died, something is dead in the RF path. I
> verified that all regulators produce the appropriate voltages. I also have
> small heatsinks on them, and a fan in the box. Its been running for years
> without any cooling, and a few months with my new cooling strategy.
>
> When I run it for a day on 7 bands, I still do skim about a dozen
> stations, but its really deaf. I have eliminated any coax routing, have
> even tried to go directly into the BNC with a wire, and all its picking up
> a few birdies, that seem to come from the QS1R itself.
>
> Ideas what to check?
>
> Thanks and 73
> Andy
> KU7T
>
> Sent from Mail<https://go.microsoft.com/fwlink/?LinkId=550986> for
> Windows 10
>
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