There is a circuit of sorts in ER Number 179 with a story about Hoisy not long after his death.I will see if I can send you a copy. Joe W4AAB ----- Original Message ----- From: "Bob Bruhns" <[EMAIL PROTECTED]> To: "Discussion of AM Radio" <amradio@mailman.qth.net> Sent: Friday, February 24, 2006 7:13 PM Subject: Re: [AMRadio] W4CJL's Taylor Super Modulation
> Hi Tom, > > After scouring the internet for a while now, I still > can't find any articles at all on the details of the > Taylor circuit. > > I found an article by Hoisy from AM Press/Exchange > where he refers to W6QYT and W3PHL, and the Taylor > super-modulated circuit. > http://www.amfone.net/AMPX/65.html > Scroll down to "The Super Modulation Audio Processing > Group" which is a little before the middle of the > issue. > > Villard worked with various modulation techniques, and > he is famous for his involvement in the development of > amateur SSB. W3PHL Fred used a high level balanced > modulator. (Very high level - 600 watts carrier, 2400 > watts audio). I think Hoisy was talking about the > ability to transmit negative carrier with a high-level > modulated stage, and the ability to modulate beyond > 100% negative, but he was also talking about negative > cycle loading, and he said something about an FCC limit > of 2KW PEP per sideband, so the details may not have > been entirely accurate. > > I also found this page: > http://glowbug.port5.com/DSB.html > Lots of stuff on balanced modulation from way back > when. All of the designs seem to be about completely > balancing out the carrier, but the QST article > references George Grammer's article, "Practical > D.S.B.R.C. Transmitter Design" from QST Maym, 1951, > which appears to be about an AM-DSB transmitter that > can be run at any level of carrier. > > There is also Fred W3PHLs article "Modulation > Unlimited" from around CQ around 1967. I believe it > was a two-part article. He was describing the > "upside-down tube" high level balanced modulator, which > can be unbalanced for carrier output by applying DC > along with the audio. W3DUQ and I also used similar > circuits way back when, and K1JJ tried one also. > > Bacon, WA3WDR > > > ----- Original Message ----- > From: "Tom Elmore" <[EMAIL PROTECTED]> > To: <amradio@mailman.qth.net> > Sent: Monday, February 20, 2006 5:19 PM > Subject: [AMRadio] W4CJL's Taylor Super Modulation > > > > Does anyone know if the articles that, Don Hoisington > W4CJL, wrote about > > Taylor Super Modulation still exist today ? I have > contacted Electric Radio > > magazine about getting some back issues. I would like > to get some copies of > > his work if it was passed along to somebody after he > passed away. > > > > > > > > > > Thank You > > Tom Elmore KA1NVZ > > Anchorage, Alaska > > > > > _______________________________________________________ > _______ > > AMRadio mailing list > > Home: http://mailman.qth.net/mailman/listinfo/amradio > > Help: http://mailman.qth.net/mmfaq.html > > Post: mailto:AMRadio@mailman.qth.net > > AMfone Website: http://www.amfone.net > > AM List Admin: Brian Sherrod/w5ami, Paul > Courson/wa3vjb > > > > ______________________________________________________________ > AMRadio mailing list > Home: http://mailman.qth.net/mailman/listinfo/amradio > Help: http://mailman.qth.net/mmfaq.html > Post: mailto:AMRadio@mailman.qth.net > AMfone Website: http://www.amfone.net > AM List Admin: Brian Sherrod/w5ami, Paul Courson/wa3vjb >