Re: {Collins} ALC and 30S-1 drop out - a question



Walter and all,

If the 30S-1 dropped out the 32S-3, which presumably was tuned to match 50
ohms for driving the 30S-1 input circuit, would be presented with an open
circuit for an instant while the antenna changeover relay was deenergized,
and then with the antenna impedance, which probably was not 50 ohms either.
That might explain the ALC meter behavior.

73,
Bob AD3K

-----Original Message-----
From: Collins [mailto:collins-bounces@xxxxxxxxxxxxx] On Behalf Of Bill Carns
Sent: Tuesday, December 18, 2012 6:23 PM
To: 'Walter E. Cheatham'; 'Collins Collectors Association'
Subject: Re: {Collins} ALC and 30S-1 drop out - a question

I am thinking that your S-Line xmtr went to full output for a short time and
that smacks of an intermittent in the carrier control area...Maybe an
intermittent ground on the pot or ???

Bill

-----Original Message-----
From: Collins [mailto:collins-bounces+wcarns=austin.rr.com@xxxxxxxxxxxxx] On
Behalf Of Walter E. Cheatham
Sent: Tuesday, December 18, 2012 3:49 PM
To: Collins Collectors Association
Subject: {Collins} ALC and 30S-1 drop out - a question

Hi all,

Does anyone have a possible answer to why my 32S-3 transmitter meter (set to
monitor ALC) suddenly pegged and the 30S-1 dropped out?

Id like some ideas before either it happens again or I dig in and try to
determine what happened (please don't think me lazy).

Below is my original email from 12/16/12 for reference.

Walt Cheatham K7CCA

X-X-X-X-X-X-X

All,

Today while I was checking in on the CCA Sunday Prenet, I was talking to
Jerry - N4JL, and suddenly I noticed my 32S-3 meter (set for ALC) pegged and
the 30S-1 dropped out.

I "went for it" and put the 30S-1 back "ON" and all was normal from then on.

After I finished saying what I HAD been sawing, Jerry mentioned that he
noticed I had dropped out a moment earlier.

The only thing I can think of is that it had been raining (lightly)
yesterday and MAYBE my Dipole antenna was damp at the center. This was the
first time I have been on the air since two weeks ago.

So, any ideas what happened? I have NOT looked into anything yet.

Should I be worried or wait and see if it happens again and the IF it
happens again, then start looking for the cause.

Walt K7CCA

X-X-X-X-X-X-X-X

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_______________________________________________
SHARE THE FUN: JOIN THE COLLINS COLLECTORS ASSOCIATION TODAY !
http://www.collinsradio.org/?page_id=37

 NETS: Tues & Thur: 3.805 MHz-2000 Central + Fri: 3.895 MHz-2000 Pacific
  SUNDAYS: 14.263 MHz-2000 UTC  +  AM Net: 29.050 MHz-1200 Central
  1st Wednesday AM Net 3.880 MHz-2000 local (ET, CT, MT, PT)

The Collins Reflector reserves the right to refuse access to anyone.

LIST HELP?  ADMIN EMAIL:  collins-owner@xxxxxxxxxxxxx This ONLY goes to the
list admins and does not post to the group!






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