Boy have I seen a bunch of those....and "Troubles Clear Leaving Here"
Cecil
K5DL
----- Original Message -----
From: "GARY HUBER" <glhuber@msn.com>
To: "Discussion of Ten-Tec Equipment" <tentec@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@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@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
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