[time-nuts] Can a Trimble Thunderbolt cause QRM? Noise can be seen remotely via my SDR.

[Bob kb8tq]

Hi

Best guess is that it’s driving a fairly long un-terminated cable. It could easily have come
loose at some point. Indeed there are other possibilities. It depends quite a bit on just what
the TBolt is driving …

Bob

> On Jan 12, 2021, at 6:30 PM, Chris Wilson <chris at chriswilson.tv> wrote:
> 
> 
> 
>  12/01/2021 23:21
> 
> I have had a sudden occurrence of interference on all my HF receivers / transceivers recently.  I cannot gain access to the remote location where they are and am operating them remotely at the moment. At the site is my Trimble Thunderbolt and it's been on permanently for several years with no apparent issues. It feeds a divider by David Partridge. I am wondering if the TB could be the source of the QRM in some way as it's bang on 10MHz. I no longer see WWV but a very loud noise on all receivers on 10MHz, 20MHz and 30MHZ. If I zoom right in I see what looks like FSK on the signal. The spurs are all over the place and particularly bad, if they are indeed spurs of the 10MHz noise, around 21 MHz.
> 
> Would some Sherlock Holmes who is familiar with remote operating a Kiwi SDR receiver have a look around and tell me if they think the TB could have gone berserk in some way please? I can't think of any other 10Mhz source at the location. Thanks and a belated happy and healthy New Year to all.
> 
> The Kiwi can be accessed at:
> 
> http://82.70.254.222:8073/
> 
> -- 
>       Best Regards,
>                   Chris Wilson.
> mailto: chris at chriswilson.tv
> 
> 
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