[Skimmertalk] Deaf QS1R

[Bob Wilson, N6TV]

See link at bottom of my last post.  In sum, the new one is intended to
optimize the board for use as an SDR receiver (better sensitivity, better
isolation between antenna ports).

I expect it to be more expensive than the current model, because fewer will
be made (smaller market).  It could also be 6 mos before the hardware and
software is ready for prime time, but that's just my uneducated guess.

73,
Bob, N6TV

On Sat, Dec 22, 2018, 9:44 AM Andy KU7T <ku7t at ku7t.org wrote:

> Bob,
>
>
>
> I have made a few more measurements and confirmed the Low pass at the
> input is fine. So, I am declaring my QS1R dead. ☹
>
>
>
> Regarding the Stemlabs/Red Pitaya, someone mentioned a new one is coming
> out.
>
>
>
> What is the difference between new and old?
>
> Is the old one (+ transformer) just as performant as the new one?
>
>
>
> Thanks and 73
>
> Andy
>
> KU7T
>
>
>
> Sent from Mail <https://go.microsoft.com/fwlink/?LinkId=550986> for
> Windows 10
>
>
> ------------------------------
> *From:* Bob Wilson, N6TV <n6tv at arrl.net>
> *Sent:* Saturday, December 22, 2018 8:49:42 AM
> *To:* Andy KU7T; SkimmerTalk Reflector
> *Subject:* Re: [Skimmertalk] Deaf QS1R
>
> On Thu, Dec 20, 2018 at 11:58 PM Andy KU7T <ku7t at ku7t.org> wrote:
>
>> Can only hear my signal very, very low. Tried HDSDR, with same results.
>>
>
> Thanks.  If you hear signals just fine when you connect the same cable to
> an "RX ANT" input of your transceiver, then it highly likely that the QS1R
> needs to be repaired (GL with that).
>
> Need to study the Red Pitaya, althrough I can only find a product called
>> Stem labs. Assuming this is the same?  How good is it and is it widely used?
>>
>
> Yes, many of us have switched to the Red Pitaya STEMlab 125-14 starter kit
> for 8-band skimming, as performance is just as good as the QS1R  (when
> properly configured with a 14:1 transformer
> <https://www.kkn.net/~n6tv/XFMR/> on the input), plus you get two antenna
> inputs instead of just one.  See:
>
> http://hamsci.org/cw-reverse-beacon-network-how-guide
> http://hamsci.org/n6tv-red-pitaya-combine-cw-rtty-skimmer-hdsdr
>   (some links out-of-date, I will update eventually)
> https://github.com/HrochL/CWSL/tree/master/bin
>
> A new model is coming that will be even better, but it may be months away
> from availability (I will try to find out).
>
> https://www.redpitaya.com/n86/new-stemlab-sdr
>
> 73,
> Bob, N6TV
>
>
>
On Sat, Dec 22, 2018, 9:44 AM Andy KU7T <ku7t at ku7t.org wrote:

> Bob,
>
>
>
> I have made a few more measurements and confirmed the Low pass at the
> input is fine. So, I am declaring my QS1R dead. ☹
>
>
>
> Regarding the Stemlabs/Red Pitaya, someone mentioned a new one is coming
> out.
>
>
>
> What is the difference between new and old?
>
> Is the old one (+ transformer) just as performant as the new one?
>
>
>
> Thanks and 73
>
> Andy
>
> KU7T
>
>
>
> Sent from Mail <https://go.microsoft.com/fwlink/?LinkId=550986> for
> Windows 10
>
>
> ------------------------------
> *From:* Bob Wilson, N6TV <n6tv at arrl.net>
> *Sent:* Saturday, December 22, 2018 8:49:42 AM
> *To:* Andy KU7T; SkimmerTalk Reflector
> *Subject:* Re: [Skimmertalk] Deaf QS1R
>
> On Thu, Dec 20, 2018 at 11:58 PM Andy KU7T <ku7t at ku7t.org> wrote:
>
>> Can only hear my signal very, very low. Tried HDSDR, with same results.
>>
>
> Thanks.  If you hear signals just fine when you connect the same cable to
> an "RX ANT" input of your transceiver, then it highly likely that the QS1R
> needs to be repaired (GL with that).
>
> Need to study the Red Pitaya, althrough I can only find a product called
>> Stem labs. Assuming this is the same?  How good is it and is it widely used?
>>
>
> Yes, many of us have switched to the Red Pitaya STEMlab 125-14 starter kit
> for 8-band skimming, as performance is just as good as the QS1R  (when
> properly configured with a 14:1 transformer
> <https://www.kkn.net/~n6tv/XFMR/> on the input), plus you get two antenna
> inputs instead of just one.  See:
>
> http://hamsci.org/cw-reverse-beacon-network-how-guide
> http://hamsci.org/n6tv-red-pitaya-combine-cw-rtty-skimmer-hdsdr
>   (some links out-of-date, I will update eventually)
> https://github.com/HrochL/CWSL/tree/master/bin
>
> A new model is coming that will be even better, but it may be months away
> from availability (I will try to find out).
>
> https://www.redpitaya.com/n86/new-stemlab-sdr
>
> 73,
> Bob, N6TV
>
>
>