[TenTec] InRAD 2.1 kHz Filter for the Argonaut 509 (The Argo fromHell)

[NJ0IP]

Geoff, you need to replace the dial cord.  In fact, probably only the rubber
piece, but as long as you're in there, you might as well replace both pieces
(just to be on the safe side).  They are available from Ten-Tec for pennies.

Yes, you do have to remove the front panel and it's a lot of work but not
difficult.  I also recommend not putting the radio back together for a day
or two and tune a lot on the VFO knob.  Then make one final adjustment
before securing the front panel.  I've done this to an Argonaut and an
Argosy.  Each time I initially didn't have enough tension (the rubber piece
was not tensioned enough).

Gud Luk.

73
Rick  

-----Original Message-----
From: tentec-bounces at contesting.com [mailto:tentec-bounces at contesting.com]
On Behalf Of Geoffrey S. Mendelson
Sent: Tuesday, December 21, 2004 7:03 PM
To: tentec at contesting.com
Subject: Re: [TenTec] InRAD 2.1 kHz Filter for the Argonaut 509 (The Argo
fromHell)

Richard Arland wrote:
> Gang:

Two Argo 509 questions:

1. Have you thought about replacing the Dual gate MOSFET in the front end
   with a 3n211? I once read that the mod was "drop in and tweak", giving
   beter sensitivity and the 3n211 has built in overvoltage and static 
   protection? Has anyone seen this mod documented?

2. I dug up my argo 509 today and found it has one problem. The dial pointer
   won't go below .075. Otherwise the rig works fine, and the tuning 
   using the dial skirt numbers is accurate.  The PTO is in good shape, 
   so besides from astetic (sp?) concerns should I fix it?

   Is it an easy fix? To me it looked like the front cover had to come
   off which does not seem easy.

Thanks and 73,

Geoff (N3OWJ,4X1GM)
-- 
Geoffrey S. Mendelson, Jerusalem Israel gsm at mendelson.com 
IL Voice: 972-544-608-069  IL Fax: 972-2-648-1443 U.S. Voice: 1-215-821-1838

I may be an old fart, but I'm a high-tech, up to date old fart. :-)
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