[Collins] 75A3 accessory?

[Guy Olinger, K2AV]

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" <wa5vgo@earthlink.net>
To: "Guy Olinger, K2AV" <k2av@contesting.com>; "Collins2 LIST"
<collins@mailman.qth.net>
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.
>
>