[TenTec] Paragon II problems

Vic Klein vhklein at ptd.net
Sun Jun 14 07:08:38 EDT 2015

The audio distortion is probably the Major Loop PLL board. There are 4
sections and the innermost one covers the frequencies from 0.1-7 mHz. A
common Paragon problem is with aging solder connections on the major and
minor loop boards. Often just reheating the connections in the affected area
until the solder flows will solve the issue, at least for a while.
Ultimately, if the problem continues you can remove the old solder and
resolder the connections. The problem essentially goes away for decades
then. The boards are easy to access under the aluminum shield that would
have the FM board installed on the upper left facing the radio. 

To: "Discussion of Ten-Tec Equipment" <tentec at contesting.com>
Subject: [TenTec] Paragon II problems
From: "Mark Kenward" <k8vf_mark at centurytel.net>
Reply-to: Mark Kenward <k8vf_mark at centurytel.net>, Discussion of Ten-Tec
Equipment <tentec at contesting.com>
Date: Sat, 13 Jun 2015 14:30:52 -0400
I bought a PII recently from a SK buddy's son.

I am running into a couple issues.

1- after warming up, I am losing 160 meter , 80 meter, and 60 meter transmit
and receive. Rig appears dead. Works ok elsewhere.

Any thoughts on where in the rig all 3 bands would be having something in
common which would cause this?

2- transmit audio on LSB and USB on above bands has a distortion on it.(even
when monitored on a nearby receiver with power turned all the way down, and
is tx-ing into a dummy load with 250 mw.

Listening on monitor circuit, audio sounds clean, no issues, but tx audio is
distorted-again, power is all the way down, and into a dummy load, listening
adjacent Ten Tec Eagle.(with attenuation and rf gain fully back)

I checked bfo adjustments and they were close, but I touched them up. LSB
and USB spot on, CW tx signal at 710Hz, with cap bottomed out.

LSB had been reported as narrow, abt 1.8kHz, but now at about 2.1   USB
sounds fine.

As usual, thanks in advance for any ideas on these 2 issues.

I am not  PLL savvy, and I dont see anywhere  that I recognize where these 3
bands have anything in common.....

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