Re: [AMRadio] Re: AM Transmitter Advice??
- Original Message - From: Bob Deuel 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. Could you get me a copy of the article or point me to a place where I could get it. That is MOST interesting. I have seen vacuum tube diodes used as noise generators (the 5722 comes to mind here), but I have never seen them used as amplifiers or oscillators. Phil K2PG
Re: [AMRadio] Re: AM Transmitter Advice??
If memory serves the diodes need to be configured push-pull for amplifier use and push-push if employed as an oscillator. . Its important to use a very noisy buffer in front the oscillator to cancel the hash inherent to the diodes.The second diode acts similar to a screen for steering Phil Galasso wrote: - Original Message - From: Bob Deuel 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. Could you get me a copy of the article or point me to a place where I could get it. That is MOST interesting. I have seen vacuum tube diodes used as noise generators (the 5722 comes to mind here), but I have never seen them used as amplifiers or oscillators. Phil K2PG __ 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
Re: [AMRadio] Re: AM Transmitter Advice??
Dennis D. W7QHO Glendale, CA
RE: [AMRadio] Re: AM Transmitter Advice??
I think that was the APRIL issue of Tube Collector magazine. The heck of it is, he used a galena crystal as a modulation transformer! On 16 Feb 2006 at 20:42, John Coleman ARS WA5BXO wrote: OK BOB! You got my attention. Explain more. I hope I'm not a sucker here. I have seen and extremely low mu amplifier circuit (common cathode) made by reverse biasing the plate of a triode and forward biasing the grid where output is taken from the grid and input is on the plate. So I know that weird stuff does exist. John, WA5BXO -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Bob Deuel Sent: Thursday, February 16, 2006 6:05 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: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 __ 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
Re: [AMRadio] Re: AM Transmitter Advice??
Reverse biasing the galena crystal was a stroke of genius. 100% negative side modulation with no need for clipping on the pos. side. Cleanest class C sine wave ever. Brilliant. Brian Carling wrote: I think that was the APRIL issue of Tube Collector magazine. The heck of it is, he used a galena crystal as a modulation transformer! On 16 Feb 2006 at 20:42, John Coleman ARS WA5BXO wrote: OK BOB! You got my attention. Explain more. I hope I'm not a sucker here. I have seen and extremely low mu amplifier circuit (common cathode) made by reverse biasing the plate of a triode and forward biasing the grid where output is taken from the grid and input is on the plate. So I know that weird stuff does exist. John, WA5BXO -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Bob Deuel Sent: Thursday, February 16, 2006 6:05 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: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 __ 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 Reverse biasing the galena was a stroke of genius
RE: [AMRadio] Re: AM Transmitter Advice??
John, Check this out: http://uv201.com/Tube_Pages/heintz-kaufman.htm Jim WD5JKO --- John Coleman ARS WA5BXO [EMAIL PROTECTED] wrote: OK BOB! You got my attention. Explain more. I hope I'm not a sucker here. I have seen and extremely low mu amplifier circuit (common cathode) made by reverse biasing the plate of a triode and forward biasing the grid where output is taken from the grid and input is on the plate. So I know that weird stuff does exist. John, WA5BXO -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Bob Deuel Sent: Thursday, February 16, 2006 6:05 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: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 __ 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] Re: AM Transmitter Advice??
To Jim, John and all: Jim: The URL you listed is a great site for information on the HK type 5. It is quite true that the HK type 5 never went much beyond the prototype stage and I have one of those rare little puppies in my collection. However, the larger transmitting gridless Gammatrons were used extensively in the west coast based Globe Wireless communication system built by HK. The complete HK gridless Gammatron story is about a 30-page article named Defiance in the West, The Heintz and Kaufman Story that was published in the AWA Review, Volume X, 1996. It includes pictures of all the different gridless Gammatrons. John: The 6AX5GT and some Raytheon 6X5WGT's have the proper plate-cathode construction that makes them candidates for gridless Gammatron experimentation. I can not take credit for the initial idea of using the 6AX5GT. Reed Fisher, W2CQH, first introduced the use of the 6AX5GT as an experimental gridless Gammatron substitute in an article that appeared in the April, 2004 issue of the Tube Collector. I refer to both his work and the above mentioned AWA Review article in my article that appears in the February, 2006 Tube Collector. Using the above information, I further refined the 6AX5GT Gammatron operating conditions and developed the AM transmitter circuit. My article documents my experimental findings and includes the AM transmitter schematic. In a nutshell and just enough to peak your interest into pursuing the articles for all the details, I offer the brief description of operation: One must reduce the heater voltage of the 6AX5GT to a point the there is a limited flow of electrons between cathode and one of the two plates that has been selected to act as the anode. About 15 ma. appears to be optimum in my circuits with 75 volts on the anode. The second plate is then used as the Gamma or control plate which is synonymous with the grid connection in a triode circuit. Control potentials imposed on the designated Gamma plate diverts some of the cathode to anode electron flow to the Gamma plate therefore causing triode action. A word of caution! Since one has a forward biased diode across the power supply with only the cathode temperature limiting the electron flow, one must protect the power supply from the possibility of excessive current. Initially, I used a #47 lamp in series with the anode and the power supply. I got tired of replacing the lamps when I was experimenting with various Gamma currents or electron space charge buildup and resorted to a voltage divider setup allowing 75 volts at 15 ma. from a 180 volt supply. The design wattage of the voltage dropping resistor was selected so it could safely dissipate the entire 180 volts in conditions when the Gammatron currents became excessive either due to too high of a heater voltage or electron space charge buildup. I suggest that you visit http://www.tubecollectors.org/ for information regarding the tube collector. I just noticed that the editor has not listed the February, 2006 on the website yet. However, all previous issues are currently listed. Information on the most recent issue containing my article should be appearing in the next couple days. Have fun experimenting That is what ham radio is all about. Bob, K2GLO -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Jim Candela Sent: Friday, February 17, 2006 4:09 AM To: Discussion of AM Radio Subject: RE: [AMRadio] Re: AM Transmitter Advice?? John, Check this out: http://uv201.com/Tube_Pages/heintz-kaufman.htm Jim WD5JKO --- John Coleman ARS WA5BXO [EMAIL PROTECTED] wrote: OK BOB! You got my attention. Explain more. I hope I'm not a sucker here. I have seen and extremely low mu amplifier circuit (common cathode) made by reverse biasing the plate of a triode and forward biasing the grid where output is taken from the grid and input is on the plate. So I know that weird stuff does exist. John, WA5BXO -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Bob Deuel Sent: Thursday, February 16, 2006 6:05 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
[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] 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:AMRadio@mailman.qth.net AMfone Website: http://www.amfone.net AM List Admin: Brian Sherrod/w5ami, Paul Courson/wa3vjb
Re: [AMRadio] Re: AM Transmitter Advice??
Or a pair of 5U4's in grounded-grid. Joe W4AAB - Original Message - From: ne1s [EMAIL PROTECTED] To: Discussion of AM Radio amradio@mailman.qth.net Sent: Thursday, February 16, 2006 12:35 PM 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:AMRadio@mailman.qth.net AMfone Website: http://www.amfone.net AM List Admin: Brian Sherrod/w5ami, Paul Courson/wa3vjb
Re: [AMRadio] Re: AM Transmitter Advice??
Or a pair of 5U4's in grounded-grid. Joe W4AAB Diode bias? Barrie, W7ALW
RE: [AMRadio] Re: AM Transmitter Advice??
OK BOB! You got my attention. Explain more. I hope I'm not a sucker here. I have seen and extremely low mu amplifier circuit (common cathode) made by reverse biasing the plate of a triode and forward biasing the grid where output is taken from the grid and input is on the plate. So I know that weird stuff does exist. John, WA5BXO -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Bob Deuel Sent: Thursday, February 16, 2006 6:05 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: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
RE: [AMRadio] Re: AM Transmitter Advice??
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: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 -- 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
