[TenTec] Power Supply temperature

[Bry Carling]

Thank you Clayton,

It sounds like this is a very common thing with Tentec Radios / Power supplies of the 1980s.
Maybe into the 1990s as well. I am sure the engineers just expected you to keep things from 
touching the super hot heatsink back there, and also never to live in Florida (grin!) A fan is 
definitely going to get added. 

I have been loving this OMNI VI Plus though. The S meter is a terrible liar, and my noise level 
can be anywhere from S2 to S6 here on most bands. It hovers around S4 usually which is 
annoying, and it rarely ever reaches S9 even on the striongest signals.

I still manage to have a lot of contacts, especially with the SKCC Group. This afternoon I 
worked a guy up in the northeast who was using a Heathkit HW8 and running 8 watts out. He 
hit S5 on my S meter which is an actual S7. Not bad for 2 watts.

73 de AF4K, Bry

On 18 Feb 2014 at 17:25, Clayton Brantley wrote:

> Brian:  Might want to measure the voltage at the large cap and then
> deduct the output
> voltage from that first measurement.  That will tell you how much is
> dropped across the
> pass transistor.  If you have more than a few volts difference then
> all that has to be 
> dissipated as heat.  It's the old I squared R thing.  
> 
> 73 Clayton N4EV
> 
> 
> 
> 
> 
> On Tuesday, February 18, 2014 8:00 PM, Brian Carling
> <bcarling at cfl.rr.com> wrote:
>  
> I will do the same and report results.
> 
> Best regards - Bry Carling
> 
> 
> 
> > On Feb 18, 2014, at 4:16 PM, Dave Edwards <kd2e at comcast.net>
> wrote:
> > 
> > I'll go turn it on now.
> > 20 meters, medium volume.
> > 
> >> On 2/18/14 4:12 PM, Brian Carling wrote:
> >> Thank you Dave. I think it does get hot just on receive only. I
> will try it that way for a while this afternoon. If you could do the
> same and tell me what you find I would appreciate it.
> >> 
> >> Best regards - Bry Carling
> >> 
> >> 
> >> 
> >>> On Feb 18, 2014, at 3:33 PM, Dave Edwards <kd2e at comcast.net>
> wrote:
> >>> 
> >>> What happens on receive only?
> >>> I can turn my OMNI VI Plus on, let it sit for a while and see
> how hot it gets if that will help.
> >>> ...Dave
> >>> 
> >>> 
> >>>> On 2/18/14 1:27 PM, Bry Carling wrote:
> >>>> I have noticed that the power suply with my OMNI VI Plus seems
> to get extremely hot, even
> >>>> wit hcasual CW operation.
> >>>> 
> >>>> Has anyone else noticed the same? I can barely touch the fins
> on th eback.
> >>>> 
> >>>> Thanks for any insights.
> >>>> 
> >>>> Bry AF4K
> >>>> 
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