Hi everyone.
Thanks for all the ideas.
The PSU is on the right side of the radio, and I have checked it out
internally for bad connections etc.. none found.
I'll check the connections on the radio.. fuseholder etc.
I have measured the supplies internally, all appear OK, with no variation
relative to PSU current. But the main +13.8v bus does droop as the RF out is
increased so I'll check the various components in line with it.
Has anyone ever had a problem with the power relay?
Thanks, Paul MW0CDO.
----- Original Message -----
From: "Robert & Linda McGraw K4TAX" <RMcGraw@Blomand.Net>
To: "Dennis Brickey" <n4dd@preferred.com>; <tentec@contesting.com>
Sent: Wednesday, March 27, 2002 1:57 AM
Subject: Re: [TenTec] RE: Omni V Fm'ing
> Typically if the power supply is placed adjacent to the left side of the
> Omni, the complaint of hum on the audio is common. Moving the PSU to the
> right and as far as the cable will allow will and does correct the
problem.
> You do have a solid and separate ground from the PSU to the Omni don't
you?
>
> Now as to FM'ing, is this frequency swing related to any specific event or
> signal? If it follows the audio, typical of SSB, then it is more likely
to
> be caused by power supply voltage changes at or in the radio, not
> necessarily observed in the PSU. I've found that the Molex connector used
> to connect DC from the PSU to the Omni is prone to oxidation. Simply
> un-plugging the cable and re-inserting it may and often does correct the
> problem. One other point to check is the screw terminals on the filter
cap
> in the PSU. Loosen them and re-tighten them. In mine, I also soldered
the
> wire in the terminal lug crimp. I've had enough problems with crimp
> connectors over the years in various applications that I subscribe to the
> method that "the crimp is the mechanical connection and the solder is the
> electrical connection". This always works!
>
> Also, one may wish to exercise all the plug-on connectors/cables in the
PSU
> and the fuse holder. At the same time, I don't subscribe to the squirt
and
> spray stuff.
>
> 73
> Bob K4TAX
>
> ----- Original Message -----
> From: "Dennis Brickey" <n4dd@preferred.com>
> To: <tentec@contesting.com>
> Sent: Tuesday, March 26, 2002 7:41 PM
> Subject: [TenTec] RE: Omni V Fm'ing
>
>
> > Maybe some of you guys can offer a clearer explanation, but as I recall,
> > Tentec suggested positioning the power supply on the left side of the
Omni
> V
> > because of signal degradation? It has been several months since I saw
the
> > information. Heck, it may not even apply to this situation, but the info
> was
> > free
> > food for thought.
> >
> > 73,
> >
> > Dennis N4DD
> >
> > _______________________________________________
> > TenTec mailing list
> > TenTec@contesting.com
> > http://lists.contesting.com/mailman/listinfo/tentec
> >
>
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