Of course no circuit diagram to inspect since it is Chinese clone, but I suspect from the generally good Rx performance that the RF input is something approximating 50 ohm.
Still quite the deal with nice case and fan.
I would still have it skimming something if I had not accidentally plugged 12v usb-c intended for my skimmer PC. 

KV4TT Mike

On Jan 1, 2023, at 6:08 AM, Niko Safaric <niko.safaric@bit.si> wrote:



Dear all,

Thank you for your kind answers. If the trx duo also has a high impedance at the input and the capability of 8 slice rx, in my opinion it is insufficiently competitive with the RP14.

Regarding 1:14 professional input transformer: on my RP14, significantly better reception is achieved with the 3/22 turns transformer on the BN73 202 .

 

73, all the best and HNY

 

Niko, S53A

 

Ps.

Pete, Thank you for your hit about frequency shift on s53a skimmer. I immediately ordered  GPSDO, but transport in UK is still on strike. Still waiting… ☹

 

 

 

Od: Skimmertalk <skimmertalk-bounces+niko.safaric=bit.si@contesting.com> Namesto Mike Zabel
Poslano: Saturday, 31 December 2022 15:51
Za: Pete Smith N4ZR <pete.n4zr@gmail.com>
Kp: skimmertalk@contesting.com
Zadeva: Re: [Skimmertalk] red pitaya clone

 

The device I tested was this:

 

I got it from AliExpress for about the same price with free shipping from seller aisianray.

I think anything with TRX-DUO name is the same device. The ZYNQ7010 is what limits it to one 8 slice Rx as the memory is smaller if I remember correctly.

 

73 de KV4TT Mike 



On Dec 31, 2022, at 8:49 AM, Pete Smith N4ZR <pete.n4zr@gmail.com> wrote:



There seem to be several clones available from Chinese sources.  It would be helpful for reviewers to specify which is which.

73, Pete N4ZR

On 12/31/2022 8:36 AM, Mike Zabel wrote:

Hi Niko,

Yes I have tried one here. It runs only the 14 bit apps from Pavel, so only 8 band capable. Even though it’s 16 bit it has a less capable FPGA installed. The hardware seemed a little less sensitive on Rx than the two 16 bit RP I have been running.

It’s good for the price, especially since the price has gone up on the Red Pitaya 😩

 

KV4TT Mike



On Dec 31, 2022, at 8:13 AM, Niko Safaric <niko.safaric@bit.si> wrote:



Hi

 

Has anyone tried to run cw skimmer on Red pitaya clone?

https://hackaday.com/2022/10/09/trx-duo-is-a-red-pitaya-clone-for-software-defined-radio/

 

Thanks,

73,

Niko, S53A

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