[Skimmertalk] WTB: QS1R

[Jeff Blaine]

Has anyone measured the LO noise on the Red Pitaya?

Here I need to be able to have a monster signal in the passband and not 
have the RMDR wipe out the noise floor.  I feed a custom low PN external 
ref to my QS1R here and that works great.  But for something with a 
generic tin-can uP oscillator, I have to wonder how clean it is.  Maybe 
someone has looked at that case specifically?

73/jeff/ac0c
alpha-charlie-zero-charlie
www.ac0c.com

On 26-Oct-18 4:38 PM, Bill Straw via Skimmertalk wrote:
> "Most QS1Rs eventually fail due to component failure related
> to excessive heat"
>
> I dread that day. Setting up the QS1R to do CW and RTTY with
> Skimmer server was very cookbook with the info on the RBN
> site. The references provided are way past me, I would have
> to hire someone to set it up
>
> Bill KO7SS
>
>
>
>
>
> ________________________________
> From: "Bob Wilson, N6TV" <n6tv at arrl.net>
> To: SkimmerTalk Reflector <skimmertalk at contesting.com>
> Sent: Friday, October 26, 2018 2:21 PM
> Subject: Re: [Skimmertalk] WTB: QS1R
>
>
>
> Hi Jeff,
>
> QS1Rs are pretty much unobtainable in working condition.  Most QS1Rs
> eventually fail due to component failure related to excessive heat,
> especially the voltage regulator.
>
> I'd highly recommend that you consider buying a Red Pitaya instead of
> trying to find a working QS1R.  The Red Pitaya receiver performance is very
> similar, it handles 8 bands at 192 kHz instead of only 7, it uses 1 Gbps
> Ethernet instead of USB, it has two antenna inputs that can be assigned to
> any of the 8 receiver slices, and it probably costs less (new) than a
> working QS1R.  The only thing it doesn't do is work with CW Skimmer (the
> older single-band version), but it works great with CW Skimmer *Server*,
> RTTY Skimmer Server, and HDSDR (simultaneously) plus it can even be
> reconfigured into a signal generator, an FT8 transceiver, a WSPR
> transceiver, an oscilloscope, etc.
>
> Some references:
>
> http://pavel-demin.github.io/red-pitaya-notes/sdr-receiver-hpsdr/
> http://hamsci.org/n6tv-red-pitaya-combine-cw-rtty-skimmer-hdsdr
> https://groups.io/g/RBN-OPS/message/2190
>
> http://pavel-demin.github.io/red-pitaya-notes/sdr-transceiver-ft8/
> http://pavel-demin.github.io/red-pitaya-notes/sdr-transceiver-wspr/
>
> 73,
> Bob, N6TV
>
> On Fri, Oct 26, 2018 at 12:38 PM Jeff Blaine <KeepWalking188 at ac0c.com>
> wrote:
>
>> Have a QS1R that needs a new home?
>>
>> If so, please contact me off list.  Thanks!
>>
>>> 73/jeff/ac0c
>>> alpha-charlie-zero-charlie
>>> www.ac0c.com
>>>
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