[TenTec] Power Supply temperature

[Clayton Brantley]

Bry, a fan is in order.  I have one on the heatsink of my VI+ and it helps.
I use a battery backed PS here and not too much heat from it.

73 Clayton N4EV





On Thursday, February 20, 2014 4:16 AM, Dave Edwards <kd2e at comcast.net> wrote:
 
Bry.....If I get a chance, I'll get into a CW QSO tomorrow, and see what 
the heat sink does.
My S meter performs fairly normal...or like other rigs.
Dead band, s meter lies on zip or S1...but I can always find signals 
that are 20 or so db or more.
If I coax switch back and forth between several other rigs...its in the 
same range.
...Dave
On 2/18/14 9:20 PM, Bry Carling wrote:
> 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
>>>>>>
>>>>>> _______________________________________________
>>>>>> TenTec mailing list
>>>>>> TenTec at contesting.com
>>>>>> http://lists.contesting.com/mailman/listinfo/tentec

>>>>> _______________________________________________
>>>>> TenTec mailing list
>>>>> TenTec at contesting.com
>>>>> http://lists.contesting.com/mailman/listinfo/tentec
>>>> _______________________________________________
>>>> TenTec mailing list
>>>> TenTec at contesting.com
>>>> http://lists.contesting.com/mailman/listinfo/tentec
>>> _______________________________________________
>>> TenTec mailing list
>>> TenTec at contesting.com
>>> http://lists.contesting.com/mailman/listinfo/tentec
>> _______________________________________________
>> TenTec mailing list
>> TenTec at contesting.com
>> http://lists.contesting.com/mailman/listinfo/tentec
>> _______________________________________________
>> TenTec mailing list
>> TenTec at contesting.com
>> http://lists.contesting.com/mailman/listinfo/tentec
> _______________________________________________
> TenTec mailing list
> TenTec at contesting.com
> http://lists.contesting.com/mailman/listinfo/tentec
>

_______________________________________________
TenTec mailing list
TenTec at contesting.com
http://lists.contesting.com/mailman/listinfo/tentec