[TenTec] Paragon Problem gets very odd

[chacuff]

Boy have I seen a bunch of those....and "Troubles Clear Leaving Here"

Cecil
K5DL
----- Original Message ----- 
From: "GARY HUBER" <glhuber at msn.com>
To: "Discussion of Ten-Tec Equipment" <tentec at contesting.com>
Sent: Saturday, July 14, 2012 2:03 PM
Subject: Re: [TenTec] Paragon Problem gets very odd


> Then there is the old TELCO serviceman's trouble ticket note.... PROBLEM
> CAME CLEAR WHILE TESTING.
>
> 73 ES DX,
> Gary -- AB9M
>
> -----Original Message----- 
> From: Ben Hall
> Sent: Saturday, July 14, 2012 1:08 PM
> To: tentec at contesting.com
> Subject: Re: [TenTec] Paragon Problem gets very odd
>
> Hi Wade,
>
> I used to have a computer that would make me very angry with
> intermittent faults.  I kept a screwdriver next to the keyboard.
>
> When it would act up, I'd grab the screwdriver and say or yell,
> depending how mad I was: "DON'T MAKE ME COME IN THERE!"  And it knew I
> would, so it would act right for some time after that.  ;)
>
> Almost ready to pull the trigger on a Mouser order for the replacement
> caps.  I will look at the connections quite carefully when I take it
> back apart to install the replacement C25 and replace the others.
>
> thanks much and 73,
> ben, kd5byb
>
>
> On 7/14/2012 12:51 PM, wade staggs wrote:
>> *Amazing,*
>> *                That cap could have been breaking down under load. You
>> could have bad connections. I would look at ALL of the connections very
>> closely. Maybe, it saw you Armed with the proper service info and you
>> scared it into working ;) I am really glad that you are on the air. If, 
>> it
>> fails again, shake the service manual at it and give it a good cursing.
>> You
>> may need to scare it some more.. Just Joking...*
>> *                                                    73 de Wade/KJ4WS*
>>
>> On Sat, Jul 14, 2012 at 12:43 PM, Ben Hall <kd5byb at kd5byb.net> wrote:
>>
>>> Morning all,
>>>
>>> An update.  So I got the power amp out of the Paragon, took it all
>>> apart, and inspected it.  I found no obvious damage - no swollen caps,
>>> no burn marks, etc...
>>>
>>> I did remove C25 (which was a 33uF, 35V, 105 deg C unit) and couldn't
>>> find a replacement in my supply.  C25 tested fine.  I ran it up to
>>> nearly 30 VDC and it did not short, did not leak, etc...
>>>
>>> But I could find nothing wrong, so I put it back together minus C25.
>>> With just the power amp on the bench, I hooked up 13.8VDC to the red
>>> lead.
>>>
>>> Everything was fine.  No power draw.  (insert head scratching here)
>>>
>>> So I put it back into the radio, hook up the RF output.  Apply power.
>>> No power draw on the red wire into the power amp.
>>>
>>> So I reattached the blue "11" plug and repeat.  No power draw.
>>>
>>> So I reattached the RF Input and repeat.  No power draw.
>>>
>>> So at this point, everything is hooked up minus the red power wire.  So
>>> I resolder it to the power board and apply power to the radio.
>>>
>>> It POWERS UP FINE.  Hooked it up to the dummy load, hooked up my mic,
>>> and it makes output power just fine.  Voice peaks into the dummy load
>>> easily hit nearly 100W.
>>>
>>> SoooOOOOooo!  I am now totally confused as to what's going on.  Best I
>>> can figure was maybe a loose connection from the bias board to the power
>>> amp?  VERY ODD.
>>>
>>> I am ordering some replacement caps from Mouser - will replace that 33uF
>>> and the 10uF ones with 50VDC, 105 deg C replacements...
>>>
>>> thanks much and 73,
>>> ben, kd5byb
>>> _______________________________________________
>>> TenTec mailing list
>>> TenTec at contesting.com
>>> http://lists.contesting.com/mailman/listinfo/tentec
>>>
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>
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