[AMRadio] Elmac AF68 mod driver xfmr

[C.L. Mitchell]

That's what I'm using in my AF-68.  Has been reliable for me

73,  Mitch
K9PNP
________________________________
From: amradio-bounces at mailman.qth.net <amradio-bounces at mailman.qth.net> on behalf of Robert Nickels <ranickel at comcast.net>
Sent: Tuesday, December 4, 2018 11:03 AM
To: amradio at mailman.qth.net
Subject: Re: [AMRadio] Elmac AF68 mod driver xfmr

On 12/4/2018 12:22 AM, CL in NC via AMRadio wrote:
> By any chance, does someone have a AF68 modulator driver transformer they can part with?  Does anyone know of a sub for it?  Anyone redesigned the 12AU7 driver tube circuit so the plate and cathode drive the modulator tubes direct?  Thanks.

Charlie, some re-wire the driver as a phase inverter and eliminate the
transformer, but for those who want to stay with the original design the
$17 Hammond PT-156 is equivalent to the old Stancor A-53C and works well:

https://www.tubesandmore.com/products/transformer-audio-interstage-10-ma

73, Bob W9RAN

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