[AMRadio] Modulator design needed


Mike Sawyer w3slk at uplink.net
Sun Mar 26 13:19:06 EST 2006


Bob,
    I suggest you look at the schematics again. The output of the 5763 goes 
no where near the modulator.  I don't have the schematics in front of me but 
I have done some extensive work in the audio section.
Mod-U-Lator,
Mike(y)
W3SLK
----- Original Message ----- 
From: <rbethman at comcast.net>
To: <w1eof at hamnutz.com>; "Discussion of AM Radio" <amradio at mailman.qth.net>; 
"Discussion of AM Radio" <amradio at mailman.qth.net>
Sent: Sunday, March 26, 2006 12:59 PM
Subject: Re: [AMRadio] Modulator design needed


Mark,

Take a look at a Heathkit Apache schematic, (TX-1), for ideas.

There is NO driver transformer.  The 5763 driver goes to the Mod transformer 
and the EL-34s feed it for audio.

Bob - N0DGN

 -------------- Original message ----------------------
From: "W1EOF" <w1eof at hamnutz.com>
>
> I've been gifted a nice mod transformer so I can build a modulator for my
> Johnson 6N2. I don't have a driver transformer so I'm looking for a design
> which doesn't need one. I'm sure the schematics are out there, but I keep
> finding ones with the driver transformer. Same with all my old radio books
> that I've looked at so far. Can someone point me in the direction of a 
> good
> design that is online, or one that you can share with me via email? 
> Thanks!
>
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