Re: {Collins} 75S-1 Modifications



I would be interested to receive it also.

Buzz
W3EMD; 75S1 user on AM; no CW filter or mods.

-----Original Message-----
From: John Painter [mailto:johnpainter@xxxxxxxxxxx] 
Sent: Saturday, February 11, 2012 5:03 PM
To: collins@xxxxxxxxxxxxx
Subject: Re: {Collins} 75S-1 Modifications

It would be interesting to have a description of what that mod is, for those
of us who still use the 75S-1 on CW and AM.

And is that 1969 article on the Collins Website?

John Painter
W5LQS

-----Original Message-----
From: Fernando [mailto:n2fq@xxxxxxxxxxxxx] 
Sent: Saturday, February 11, 2012 3:09 PM
To: bfetters@xxxxxxx; collins@xxxxxxxxxxxxx
Subject: Re: {Collins} 75S-1 Modifications

Hello 

QST March 1969 described what you have.

I've sent you a copy of that article.

Fernando N2FQ/6
n2fq@xxxxxxxxxxxxx




On Feb 11, 2012, at 11:42 AM, bfetters@xxxxxxx wrote:

> 
> 
> 
> I just picked up a 75S-1 at an estate sale.  Unit is very clean and works
great.  Got a good price on it because no one seemed to know what it was.
> 
> 
> There is one modification that I have not identified.  It's mounted in the
middle of the chassis (where the aluminum plate normally is) and contains
two crystals (32.8 MC), a couple trimmers, a few semiconductors and several
resistors.  I tried to attach a picture, but the Collins filters kicked back
my email.   Will be glad to send a pix directly to anyone who might be able
to assist me.
> 
> 
> I did not yet pull the unit from the cabinet so I cannot tell you where
this modification connects.  I did note that the unit works in the CW
position, so I am assuming it may be related to a home brew CW filter?
There are no holes/controls added to the front panel or elsewhere.
> 
> 
> Thoughts?
> 
> 
> Thanks.
> 
> 
> Buck W0LC
> 
> 
> 
> 
> 
> 
> _______________________________________________
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_______________________________________________
SHARE THE FUN: JOIN THE COLLINS COLLECTORS ASSOCIATION TODAY !
http://www.collinsradio.org/membership/

 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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