[Skimmertalk] RedPitaya 125-10 vs 125-14

[Paul]

I did receive some good information from one of the subscribers to this list and it pretty much confirms what I suspected of the receiver, surely it is good enough for most and what we might expect at the price point.

From your list Bob and for technical completion, it is quite a lot less sensitive than the QS1R even with the matching transformer, certainly here I would need an external preamp or active band preselector, this would further degrade the already worse large signal handling capability. The return loss at the input will make it more difficult to match to external filters.

That might not matter to most and the fact that it is available is a huge bonus today, as long as people realise it is not quite the quality of receiver that we have been using on the network.

Pretty much what we should expect when comparing a $750 receiver with $300 piece of test equipment. (or whatever the current prices are)



73 de Paul GW8IZR



> On 23 Nov 2017, at 22:55, Bob Wilson, N6TV <n6tv at arrl.net> wrote:
> 
> On Thu, Nov 23, 2017 at 5:54 AM, Stefan von Baltz, DL1IAO <
> dl1iao at contesting.com> wrote:
> 
>> I see that you can run CwSkimmer and RttySkimmer with one Pitaya and one
>> PC. But does anyone run 2 Pitayas on one PC with 2 instances of CwSkimmer
>> or even 2 instances each of CwSkimmer and RttySkimmer? This would require a
>> powerful PC, though.
>> 
> 
> Yes, I've been running two Red Pitaya STEMlab 125-14s to monitor CW on 14
> bands total, plus RTTY Skimmer server on 6 bands.  I did make two instances
> of RTTY Skimmer run, but with any activity or carriers, the CPU was pegged.
> 
> The Red Pitaya has four main advantages over the QS1R:
> 
>   1. It can monitor 8 bands at 192 kHz instead of only 7
>   2. It has two antenna inputs, assignable to each receiver slice
>   3. It is well supported and easy to order
>   4. It is very economical (less than $360 with the case, fan, and
>   transformer)
> 
> Unlike the QS1R, it does need an external 14:1 transformer on each input
> (see http://www.kkn.net/~n6tv/XFMR/).  I can order and distribute more of
> those if there is enough  demand.
> 
> 73,
> Bob, N6TV
> _______________________________________________
> Skimmertalk mailing list
> Skimmertalk at contesting.com
> http://dayton.contesting.com/mailman/listinfo/skimmertalk