[Boatanchors] Atlas-210X Service Bulletins

[AI2Q]

Many thanks Al!

I've had my Atlas-210X for 20 years, and enjoy it a lot. I have worked so 
much DX from the mobile that it's astonishing. The brickwall filter is 
amazing, too. Fantastic shape factor.

Anyhow, I was thinking of driver-xstr emitter bypassing, too, so it's good 
to see another op that has some notes to look at.

By the way, the way the output is set up on a 210X, the SWR sensing circuit 
(transformer and cap to sense in-phase I and E, respectively) is located 
AFTER the changeover relay. That means that if the relay fails open, there's 
NO protection to the finals.

It's easy to swap the cabling and set it up so that the RF feeds the 
Breune-type SWR bridge BEFORE the RF gets to the relay contacts. That way, 
if the relay fails, the bridge sends an RF-derived error signal (hey, I'm 
not looking into 50-ohms resistive; current and voltage are w-a-a-a-y out of 
phase) back to the pre-driver, and the $$ PA xstrs are saved.

I have done this to my rig years ago, but have never seen any other 
reference to this anywhere else.

Vy 73, AI2Q, Alex in Maine
http://users.adelphia.net/~alexmm/ai2q.htm

----- Original Message ----- 
From: Al Parker
To: AI2Q ; BAqth
Sent: Friday, May 20, 2005 10:54 AM
Subject: Re: [Boatanchors] Atlas-210X Service Bulletins


Hi Alex,
    I picked up a 210 a yr ago this wk, and it's still awaiting my attn to
get it going properly.  It was working somewhat when I got it, but after
some judicious (maybe not judicious enuf) cleaning, it decided not to
cooperate.
    Back then I found this site:
http://www.davepick.btinternet.co.uk/atlas/mods.htm
with a lot of info, incl mods and at least some Atlas bulletins.  I see
now that he also links to Hamanuals:
http://www.hamanuals.com/miscmans.html
where you can download a pdf of the svc manuals.  I don't think that was
available a yr ago, I just saved it & will get back to work when I get a
round tuit.
    Good luck, keep us informed of your progress, maybe that'll motivate
me.
73,
Al, W8UT
New Bern, NC
BoatAnchors appreciated here
http://www.thecompendium.net/radio/
http://www.hammarlund.info



----- Original Message ----- 
From: "AI2Q" <ai2q at adelphia.net>
To: <boatanchors at mailman.qth.net>
Sent: Thursday, May 19, 2005 11:00 PM
Subject: [Boatanchors] Atlas-210X Service Bulletins


> Does anyone have, or have access to, the old Atlas-210X factory Service
> Bulletins? I'm looking for the ones in particular that pertain to RF
output
> level settings.
>
> Thanks in advance!
>
> Vy 73, AI2Q, Alex in Maine
> http://users.adelphia.net/~alexmm/ai2q.htm
>
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