[Collins] 75A3 accessory?

Sun, 24 Mar 2002 11:34:50 -0500

Go to the CRA website.

David Knepper - W3ST
Publisher of the Collins Journal
Secretary to the Collins Radio Association
CRA website:  http://www.collinsra.com 

-----Original Message-----
From: [email protected]
[mailto:[email protected]]On Behalf Of Guy Olinger, K2AV
Sent: Sunday, March 24, 2002 10:26 AM
To: Darrell & Kay Brooks; Collins2 LIST
Subject: Re: [Collins] 75A3 accessory?

Typo on my part. The tube is a 12AU7A. Twin triode.

It's definitely a commercial construction. No markings, though.

What I would be trying to get the schematic for is how to (re)wire the
75A3 for the
mod though I can probably figure that out too. There are some number
of late revisions to the circuitry.

Is there a listing somewhere of official Collins mods for the A3?

----- Original Message -----
From: "Darrell & Kay Brooks" <[email protected]>
To: "Guy Olinger, K2AV" <[email protected]>; "Collins2 LIST"
<[email protected]>
Sent: Sunday, March 24, 2002 10:22 AM
Subject: Re: [Collins] 75A3 accessory?

> Are you sure it's not a 12AU7? That was a very common product
detector
> modification. Basically it amounted to building a 75A4 detector in
the
> receiver.
>
> Regards,
> Darrell, WA5VGO
>
>
>
>
> >The adapter I have has a single 12AU6A on top of an IF can that
> >presumably holds circuitry.
>
>

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