[Skimmertalk] Deaf QS1R

[N4ZR]

There are actually several components before the ADC input.  There is a 
gas tube protector, a series capacitor (it says "optional" on the 
schematic), and a 3-stage low pass filter with series inductors and  
capacitors to ground.  If anyone needs the schematic of the QS1R, I have 
it as a .pdf and will be happy to send it

73, Pete N4ZR
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On 12/20/2018 10:04 PM, Bob Wilson, N6TV wrote:
> On Thu, Dec 20, 2018 at 6:50 PM Andy KU7T <ku7t at ku7t.org> wrote:
>
>> I also transmit at same location but have a protector on the front end,
>> and also a 10 db preamp. Preamp first, then protector.
>>
> Protector should go between antenna and preamp, to protect the preamp.
>
>> In fact I did my investigations in SDRMaxV and it all runs fine but
>> without signals and just some strange birdies.
>>
> I don't really trust that program.  Try HDSDR via Extio_QS1R.dll or
> Extio_CWSLdll.
>
> http://www.srl-llc.com/qs1r_latest/WINRAD/ExtIO_qs1r_04192011.7z
>
> https://github.com/HrochL/CWSL/raw/master/bin/CWSL.zip
>
> Of course SDRMaxV can't be used while SkimSrv is running.
>
>> 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)
>>
> Sounds about right.  QS1R should draw about 1.5A x 5V = 7.5W when operating
> normally.
>
>> When I connect my skimmer antenna, it has about 100 decoders, when I
>> disconnect the antenna, it stays about the same.
>>
> You really have to listen with a different program as you connect and
> disconnect the antenna.
>
>>   Is there something in the RF path that I could check? Is there a
>> protection diode/fuse that could be blown?
>>
> Not that I'm aware of, other than a broken trace on the PC board at the
> antenna connector.
>
> You should still be able to hear your own transmitter when transmitting
> into a dummy load.  Assuming the RX antenna is relatively nearby.
>
> 73,
> Bob, N6TV
>
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