My Tentec supply is to the right of my Omni VI+. No known or reported hum
problems. I have an external speaker between the radio and the PSU. This
places the PSU some 7" to 8" away from the radio.
73
Bob K4TAX
----- Original Message -----
From: "Simmons Reid W" <reid.w.simmons@intel.com>
To: "Ten-Tec List" <tentec@contesting.com>
Sent: Wednesday, March 27, 2002 10:28 AM
Subject: RE: [TenTec] RE: Omni V Fm'ing
> For the Omni VI the power supply needs to be on the left of the
transceiver.
> Is the Omni V layed out differently?
>
> Reid, K7YX
>
> -----Original Message-----
> From: MW0CDO [mailto:gw7lhi@hotmail.com]
> Sent: Tuesday, March 26, 2002 11:30 PM
> To: Ten-Tec List; Robert & Linda McGraw K4TAX
> Subject: Re: [TenTec] RE: Omni V Fm'ing
>
>
> 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
> > >
> >
> > _______________________________________________
> > TenTec mailing list
> > TenTec@contesting.com
> > http://lists.contesting.com/mailman/listinfo/tentec
> >
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