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TOPIC: SunSDR2PRO no power output on 2meters

SunSDR2PRO no power output on 2meters 05 Dec 2019 23:14 #1

  • 2E0GKG
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My SunSDR2PRO no longer transmits on the 2 meter band. To be more precise I can hear the carrier / modulation on a separate receiver but the power output is 0W - when I click on Tune the current consumption goes to 3.1Amp

I don't usually use it on 2 meters but wanted to try it our again. Roman seems to think that it is an issue with a relay but I am reluctant to replace it before I have excluded a software issue.

I distinctly remember that it stopped working in one of the Beta versions when version 1.2 was being released and that rolling back to an older version "fimware 41.7?" fixed that. I had not given it too much thought as I assumed that it was a bug and that it would have by now been resolved in v1.3

Two questions/requests

1. does anyone else have a similar issue with their SunSDR2?
2. can anyone share/upload a beta version of 1.2 ? for example ExpertSDR2 1.2 beta_1 ? -

I just want to test my theory before attempting open hart surgery to replace the relay when the issue may still be with software

Many thanks

Nicholas 2E0GKG
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SunSDR2PRO no power output on 2meters 08 Apr 2020 07:50 #2

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Hi Nicholas,

Did you ever fix this problem? I seem to have a very similar problem, 0W output, can be heard on another receiver, power draw only 1.7A (according to Expert s/w).
I don't know when this happened as I hadn't tried 2 Meters in several months so I don't know if it's related to software releases or not.

Thanks,

Dermot
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SunSDR2PRO no power output on 2meters 08 Apr 2020 08:14 #3

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Hi Dermot

It turned out to be a faulty relay which I have managed to replace and all is OK again.

If you raise a support ticket Roman and his team will email you the instructions how to do it.

So far the issue has not re-occured

Thanks

Nicholas
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SunSDR2PRO no power output on 2meters 08 Apr 2020 08:39 #4

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Thanks for the quick reply Nicholas. I'll contact Roman.

Regards

Dermot
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SunSDR2PRO no power output on 2meters 20 Oct 2020 20:59 #5

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Hi all,
My one just stopped working on the 2m.
Nicholas - which relay was it? any photos?
I think it is the same fault. Current consumption 3.3A @ 13.6V.
When I switch RX2 and tune I can hear it on another radio.
How do you VooDoo?
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SunSDR2PRO no power output on 2meters 20 Oct 2020 21:26 #6

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Hi
My SunSDR2PRO did this a while ago. It was the HF/VHF changeover relay, I contacted Roman, he sent me a replacement relay which I fitted successfully - its a very tiny smd relay, a steady hand is required

73, Charlie GI4FUE
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SunSDR2PRO no power output on 2meters 21 Oct 2020 07:55 #7

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Hi Charlie,
Thank you for the info.
Soldering won't be a problem, I just need the part number, so I can fix my baby asap.
Regards
Pawel EI9HEB/SP9DR
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SunSDR2PRO no power output on 2meters 21 Oct 2020 08:48 #8

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Hi Pawel,

I had same problem with 2M output. Correct part no. for relay is IM02GR. I have got a new relay but haven't got around to getting it fitted yet. Seems to be a common problem :-(

Dermot
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Last Edit: 21 Oct 2020 08:49 by ei7ix.
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SunSDR2PRO no power output on 2meters 21 Oct 2020 10:48 #9

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Hi Dermot,
Thank you for the information.
I think I have a couple them in my stock. I will check tonight.
Regards
Pawel EI9HEB
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SunSDR2PRO no power output on 2meters 23 Oct 2020 09:21 #10

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Interested to hear if anyone has looked at the cause of the relay failure.
Was it coil or contacts ?

tnx,
chuck....
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SunSDR2PRO no power output on 2meters 23 Oct 2020 11:41 #11

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Im waiting for the courier, new relays should arrive today.
I will check this.
How do you VooDoo?
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SunSDR2PRO no power output on 2meters 14 Jan 2022 08:19 #12

Hi everybody,I've got the same problem on my sunsdr2 dx,by the way I never used it on 2 meters band....so I wanna ask if you solved this problem and if the cause was always the relay.(what relay).
Many thanks.
Cesare Borgia - I7BNX
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SunSDR2PRO no power output on 2meters 22 Jan 2022 13:37 #13

Could anyone help me about this problem?
Cesare - I7BNX
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SunSDR2PRO no power output on 2meters 23 Jan 2022 19:59 #14

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Hi Cesare
Any failures I know of have ALWAYS been a failure of relay K1_PA. Attached are the instructions I received from Roman

73, Charlie GI4FUE
Attachments:
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SunSDR2PRO no power output on 2meters 24 Jan 2022 05:51 #15

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Hi everyone.
Try this.
Attachments:
Роман, Roman
Expert Electronics
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