Hey Bob - I really enjoyed reading the article about your 6AX5 transmitter in this months Collector. Very cool stuff and what I like most about it is you did for pure enjoyment. Kudos.
73, Mark W1EOF > -----Original Message----- > From: Bob Deuel [mailto:[EMAIL PROTECTED] > Sent: Thursday, February 16, 2006 7:05 PM > To: 'Discussion of AM Radio' > Subject: [AMRadio] Re: AM Transmitter Advice?? > > > Hello Larry and all: > > Larry's tongue in cheek comment employing 866's as a linear amplifier tube > prompted me to contribute the following: Certain full-wave > rectifiers can be > configured to amplify or oscillate. I have built audio, Hartley > and Simpson > oscillators using only 6AX5GT's full-wave rectifiers as the sole active > device. These were displayed at 2004 Mid-Atlantic Antique Radio Club Meet > and actually won a Blue Ribbon. > Late last year I built an AM transmitter consisting of a Hartley > oscillator > modulated by an AM modulator using only 6AX5GT full-wave > rectifier tubes as > the active devices. No solid-state magic, just simple full-wave > rectifiers. > The basic concept is that of the Heintz and Kaufman gridless Gammatron > circuits. The transmitter was set up for the broadcast band and > works fine. > It has been publicly demonstrated a couple times now and a write up > including the circuit was published in the February, 2006 issue > of the "Tube > Collector" magazine which is the bi-monthly magazine published by the Tube > Collectors Association, Inc. It is fun to make full-wave > rectifiers do more > than just rectify. > > Bob, K2GLO > > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of ne1s > Sent: Thursday, February 16, 2006 10:36 AM > To: Discussion of AM Radio > Subject: [AMRadio] Re: AM Transmitter Advice?? > > Donald Chester writes: > > > > >> Assuming one is going to build a linear, and so putting aside other > >> issues > >> such as linear vs plate modulation, why do you think it makes a > >> difference > >> what tube is used? Are you referring to running a linear at > greater than > >> legal limit?. > > > > Well, go ahead and try building a legal limit linear that runs > a pair of > > 807's in the final. > > > > Yeah, or a pair of 866As.... > > Sorry (the devil made me do it). > > 73, > -Larry/NE1S > ______________________________________________________________ > AMRadio mailing list > Home: http://mailman.qth.net/mailman/listinfo/amradio > Help: http://mailman.qth.net/mmfaq.html > Post: mailto:[email protected] > 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:[email protected] > AMfone Website: http://www.amfone.net > AM List Admin: Brian Sherrod/w5ami, Paul Courson/wa3vjb > > > -- > No virus found in this incoming message. > Checked by AVG Free Edition. > Version: 7.1.375 / Virus Database: 267.15.10/262 - Release Date: 2/16/06 > -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.1.375 / Virus Database: 267.15.10/262 - Release Date: 2/16/06
