On Sep 5, 12:33?pm, "Harold E. Johnson" wrote:

Still looking for my class B/A article on the 304TL Heising bias shift
modulator. Am certain that the author was Bill Orr, W6SAI, cause I called
him on the phone when my 304TH didn't work as advertised. Very nice and
helpful to an almost beginner, but that article doesn't exist in any QST to
back before I would have read it. As I now recall, I think maybe Bill wrote
it up in CQ magazine and got paid for it. Don't have those on CD's.

Regards
W4ZCB

Harold

The article was "The Bias-Shift Modulator", by Bill Orr, CQ, April
1954, pp 32-38, 68. At the top of the article he was described as
being a contributing editor.

HTH and 73

John KC0G