Hi Bob
I have put my paragon 1 away for ever, it becomes a door stopper now, such a
shame, beautiful radio but the dreaded PLL unlock has put paid to its working
career.
I had spent well over 30hours trying to sort the unlock problem, got it very
briefly but then it unlocked again.
sorry to be the bearer of bad news.
maybe you can find a junker ( I think that's the term you use there across the
pond, here in the UK its 'spares or repair') with good finals.
good luck
73
Snowy G0HZE
--------------------------------------------
On Tue, 29/1/19, Bwana Bob <wb2vuf@verizon.net> wrote:
Subject: [TenTec] Paragon Finals and other woes
To: "Discussion of Ten-Tec Equipment" <tentec@contesting.com>
Date: Tuesday, 29 January, 2019, 2:35
Hi, all,
I'm trying to fix a Paragon for one of
the OTs here. I just can't keep
it running for more than a couple of
weeks at a time. I fixed multiple
PLL problems and got it running
nicely. Then, the Ten Tec power supply
blew (looks like both pass transistors
went), so an Astron power supply
was substituted. The Paragon kept
shutting down until the owner cranked
up the voltage all the way. I
determined that there was too much
voltage drop (about 2 volts, key down)
in the power cable, which was
relatively long, with multiple splices.
I suggested shortening it. This
was done and now the rig won't power on
at all. I went back and did
some more troubleshooting. I found that
the power switch ground return
on the power control board was open.
I fixed that, but found a short on
the 13.8 V bus. I haven't dug into it
yet, but fear that the Astron
supply zapped the finals.
R.F. Parts still carries the Motorola
MRF458 at a reasonable price, but
would I need a matched pair?
I also have a couple of questions on
the power control board: The
manual states that the fuse is an
AGC-25, which is fast-acting, but the
schematic shows an MDL-25 fuse, which
is time-delayed. Which is correct,
or is it non-critical? I also notice,
comparing schematics, that the
Omni V has an additional circuit on the
power control board that delays
closure of the power relay. I don't
know what purpose this serves or if
it is worth adding to the Paragon.
Finally, there is the question that at
what point does it not pay to fix
a Paragon. I've fixed my own Paragon
a few times and it works fine, but
this other one is a nightmare! It
might be better to look for a parts
unit or a used one in better shape, and
keep this one as a parts rig!
73,
Bob WB2VUF
---
This email has been checked for viruses
by Avast antivirus software.
https://www.avast.com/antivirus
_______________________________________________
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
|