Re: [AMRadio] Cleaning shack
Do you accept PayPal? Regards, Gary...WZ1M - Original Message - From: "John Lyles" <[EMAIL PROTECTED]> To: Sent: Sunday, January 22, 2006 6:01 PM Subject: [AMRadio] Cleaning shack > $20 for all, postpaid > > GE Ham News: > July/Aug 1951 v6,n4, Signal Slicer SSB adapter > March/April 1952 v7,n2, Oscillator Monitor, 1N48 > May/June 1952 v7,n3, 6 Meter Rx, 6BJ6 > Sept/Oct 1952 v7,n5 , Power Peaker 200 Watt 811A, > May/June 1953 v8,n3, The Dioplex Ant Relay, 6005 > July/Aug 1953 v8,n4, The Super 430 6m converter > Nov/Dec 1953 v8,n6, The Field Meter, Tube numbering, GL805 > Jan/Feb 1954 v9,n1, About Power Supplies > May/June 1954 v9,n3, Picking Proper Insulation, 5U4GA > Jan/Feb 1955 v10,n1, Operation Crystal, 6CA5 > March/April 1955 v10,n2, High Atten LP Audio Filter > May/June 1955 v10,n3, Ham Shack Intercom > July/Aug 1955 v10,n4, 6m Tranceiver part I > Sept/Oct 1955 v10,n5, 6m converter part II (2 copies) > Nov/Dec 1955 v10,n6, 6m 100 watt transmitter > March/April 1956 v11,n2, Tri Range VFO > May/June 1958 v13,n3 , Packaged VHF exciters > July/Aug 1958v13,n4, Special DX Log Issue > Sept/Oct 1958v13,n5, Gadget Rack, Mod Monitor, Conelrad > Jan/Feb 1959 v14,n1, 7077 RF Amps for VHF/UHF > March/April 1959 v14,n2, Bandswitching VFO, 6L6GC > May/June 1959 v14,n3, 200watt Double Sidebander > July/Aug 1959 v14, n4, 6AH6 Solid VFO, 200 Watt DSB, 6EZ8 > Jan/Feb 1960v15,n1, Operating GE HiFi Tubes as Modulators, Balun > March/April 1960 v15,n2, Mobile Transmitter/Converter for 75 > Sept/Oct 1961 v16,n5, Transmitter Protective Circuitry, Inductive Tuned VFO > March/April 1961 v16, n2, Grounded Grid Amp GL814, Multimeter > > RCA Ham Tips: > Oct/Dec 1947 vVII,n4, Modern Speech Amp using 6AS7G, Bias PS > Sept/Oct 1948 vVIII,n3, NBFM Tx with 2E26 on 10, Hifi > May 1949 vIX,n2, Tiny Tran 10 and 11 meter 5763 > July 1949 vIX, n3, Designing Modulators, RCA Voltohmyst > Jan/March 1950 vX,n1, Code Practice Unit, Electronic Keying, Overmod Ind > > > 73 > John K5PRO > New Mexico > __ > 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] 51J3 eBay madness
It's a plague-o-newbies here: 5852970663 A pretty nice old 51J3 - no plate, no case - but serviceable-looking withal - is being bid up into the exosphere by a pair of zero-feedback buyers who simply - must have... that.. RADIO!! 1/2 hour to go - $730. It's entertaining, if nothing else. Cheers John KB6SCO
RE: [AMRadio] 32V-2 speech amp question
Keep in mind, the input impedance is very high, 1 meg at the mike input stock radio. No transformer on the mike input in the 32v series. I thought the driver transformer was adequate, its very large for a driver transformer, the DX100 has a postage stamp, the 32v had a fist sized driver transformer. I use a pair of KT88 tubes as modulators and don't use the driver transformer (gave it away a long time ago). If you run the high impedance mike preamp in the rig and want some hifi, you have to run the mike preamp tube off DC. I just did 1/2 wave (1 diode) and an electrolytic cap. The size of the cap sets the voltage the filament runs at. The DC does not need to be pure, even rough DC will eliminate hum. Neg feedback, regulated voltage on the mod tube screens, large coupling caps will get you a long way to a good sounding 32V. Brett N2DTS > -Original Message- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of John > Coleman ARS WA5BXO > Sent: Sunday, January 22, 2006 11:03 AM > To: 'Discussion of AM Radio' > Subject: RE: [AMRadio] 32V-2 speech amp question > > I have not driven it externally before Craig but have some > experience with the circuitry and the driver XFMR is a weak > link in the > circuit the XFMR barely has enough iron and coupling > coefficiency in it > to pass the low frequencies that the rig is designed for. As a matter > of fact if the cathode resistor of the driver stage drops in > resistance, > as they or known to do with heat, the driver plate current > will quickly > saturate the driver XFMR causing the bass frequencies to look like a > trapezoid instead of sine wave. If you were going to go with and > outboard amplifier I would include a better driver XFMR as part of the > external circuit and go to the grids directly. > > John > Coleman > > -Original Message- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of Craig Roberts > Sent: Saturday, January 21, 2006 10:19 PM > To: Discussion of AM Radio > Subject: [AMRadio] 32V-2 speech amp question > > Has anyone tried driving the mod input transformer of the > 32V-2 (or V-3) > > directly with an outboard mic preamp? If so, what were the results, > please? > > Many thanks and 73, > > Craig > W3CRR > __ > 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] Cleaning shack
John, I'll take them. What is your address? Chuck wa2onk John Lyles <[EMAIL PROTECTED]> wrote: $20 for all, postpaid GE Ham News: July/Aug 1951 v6,n4, Signal Slicer SSB adapter March/April 1952 v7,n2, Oscillator Monitor, 1N48 May/June 1952 v7,n3, 6 Meter Rx, 6BJ6 Sept/Oct 1952 v7,n5 , Power Peaker 200 Watt 811A, May/June 1953 v8,n3, The Dioplex Ant Relay, 6005 July/Aug 1953 v8,n4, The Super 430 6m converter Nov/Dec 1953 v8,n6, The Field Meter, Tube numbering, GL805 Jan/Feb 1954 v9,n1, About Power Supplies May/June 1954 v9,n3, Picking Proper Insulation, 5U4GA Jan/Feb 1955 v10,n1, Operation Crystal, 6CA5 March/April 1955 v10,n2, High Atten LP Audio Filter May/June 1955 v10,n3, Ham Shack Intercom July/Aug 1955 v10,n4, 6m Tranceiver part I Sept/Oct 1955 v10,n5, 6m converter part II (2 copies) Nov/Dec 1955 v10,n6, 6m 100 watt transmitter March/April 1956 v11,n2, Tri Range VFO May/June 1958 v13,n3 , Packaged VHF exciters July/Aug 1958 v13,n4, Special DX Log Issue Sept/Oct 1958 v13,n5, Gadget Rack, Mod Monitor, Conelrad Jan/Feb 1959 v14,n1, 7077 RF Amps for VHF/UHF March/April 1959 v14,n2, Bandswitching VFO, 6L6GC May/June 1959 v14,n3, 200watt Double Sidebander July/Aug 1959 v14, n4, 6AH6 Solid VFO, 200 Watt DSB, 6EZ8 Jan/Feb 1960 v15,n1, Operating GE HiFi Tubes as Modulators, Balun March/April 1960 v15,n2, Mobile Transmitter/Converter for 75 Sept/Oct 1961 v16,n5, Transmitter Protective Circuitry, Inductive Tuned VFO March/April 1961 v16, n2, Grounded Grid Amp GL814, Multimeter RCA Ham Tips: Oct/Dec 1947 vVII,n4, Modern Speech Amp using 6AS7G, Bias PS Sept/Oct 1948 vVIII,n3, NBFM Tx with 2E26 on 10, Hifi May 1949 vIX,n2, Tiny Tran 10 and 11 meter 5763 July 1949 vIX, n3, Designing Modulators, RCA Voltohmyst Jan/March 1950 vX,n1, Code Practice Unit, Electronic Keying, Overmod Ind 73 John K5PRO New Mexico __ 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] Volumax for sale
CBS Laboratories Volumax 400, Automatic Peak Controller with Manual, $75 Going to Albuquerque Hamfest next weekend, will also have two 12 hy 500 mA Raytheon power chokes from RA1000 there 73 John K5PRO New Mexico
[AMRadio] More Pubs FS
Back Issues of Electric Radio: #83 (march 96) #167 (april 03) #169 (june 03) #178 (march 04) #179 (april 04) #181 (june 04) $2 each or $10 for all, + postage 73 John K5PRO
[AMRadio] Cleaning shack
$20 for all, postpaid GE Ham News: July/Aug 1951 v6,n4, Signal Slicer SSB adapter March/April 1952 v7,n2, Oscillator Monitor, 1N48 May/June 1952 v7,n3, 6 Meter Rx, 6BJ6 Sept/Oct 1952 v7,n5 , Power Peaker 200 Watt 811A, May/June 1953 v8,n3, The Dioplex Ant Relay, 6005 July/Aug 1953 v8,n4, The Super 430 6m converter Nov/Dec 1953 v8,n6, The Field Meter, Tube numbering, GL805 Jan/Feb 1954 v9,n1, About Power Supplies May/June 1954 v9,n3, Picking Proper Insulation, 5U4GA Jan/Feb 1955 v10,n1, Operation Crystal, 6CA5 March/April 1955 v10,n2, High Atten LP Audio Filter May/June 1955 v10,n3, Ham Shack Intercom July/Aug 1955 v10,n4, 6m Tranceiver part I Sept/Oct 1955 v10,n5, 6m converter part II (2 copies) Nov/Dec 1955 v10,n6, 6m 100 watt transmitter March/April 1956 v11,n2, Tri Range VFO May/June 1958 v13,n3 , Packaged VHF exciters July/Aug 1958v13,n4, Special DX Log Issue Sept/Oct 1958v13,n5, Gadget Rack, Mod Monitor, Conelrad Jan/Feb 1959 v14,n1, 7077 RF Amps for VHF/UHF March/April 1959 v14,n2, Bandswitching VFO, 6L6GC May/June 1959 v14,n3, 200watt Double Sidebander July/Aug 1959 v14, n4, 6AH6 Solid VFO, 200 Watt DSB, 6EZ8 Jan/Feb 1960v15,n1, Operating GE HiFi Tubes as Modulators, Balun March/April 1960 v15,n2, Mobile Transmitter/Converter for 75 Sept/Oct 1961 v16,n5, Transmitter Protective Circuitry, Inductive Tuned VFO March/April 1961 v16, n2, Grounded Grid Amp GL814, Multimeter RCA Ham Tips: Oct/Dec 1947 vVII,n4, Modern Speech Amp using 6AS7G, Bias PS Sept/Oct 1948 vVIII,n3, NBFM Tx with 2E26 on 10, Hifi May 1949 vIX,n2, Tiny Tran 10 and 11 meter 5763 July 1949 vIX, n3, Designing Modulators, RCA Voltohmyst Jan/March 1950 vX,n1, Code Practice Unit, Electronic Keying, Overmod Ind 73 John K5PRO New Mexico
RE: [AMRadio] F/S SX101 Mark II
Sorry Ronnie already sold it and picked up...Hi !!! Bob W1PE -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of ronnie.hull Sent: Sunday, January 22, 2006 12:42 PM To: Discussion of AM Radio Subject: Re: [AMRadio] F/S SX101 Mark II dang, I want that rx, but I have enough of them, and need to thin out my stable of rx's too LOL 73's Ronnie -- Original Message --- From: "Bob Peters" <[EMAIL PROTECTED]> To: "amradio" , "Boatanchors" <[EMAIL PROTECTED]> Sent: Sun, 22 Jan 2006 11:54:17 -0600 Subject: [AMRadio] F/S SX101 Mark II > I have a VERY nice SX101 that I need to pass on. It works very very > well. Cosmetics are a 9 +. Was owned by Dale W5LJ. Reason for sale is > that I just bought a JRC receiver. I will sell it if picked up in > Mesquite, TX for $300.00... If I have to ship it will be $350.00 due > to cost of packing material. I have a friend going to Jackson so > could be delivered there at NC...Other wise UPS charges will apply. > > Bob W1PE > 972-288-9911 > > __ > 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 --- End of Original Message --- __ 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] surrogate modualtor for the 32V
Craig, The Collins folks will cringe at the thought of "hacking up" a 32V2/3. I prefer to "hack up" Johnson gear. I did something similar to Steve on a Viking I. I used a higher power multi-tap modulation transformer (Stancor 120 watt unit) as a choke, picking the taps for the greatest inductance. I then used a hi-fi tube audio output transformer from a Harmon Kardon Citation V amplifier. This iron was rated at 40 watts down to 7 hz, so I figured it would handle lots more at 100 hz and above. I used a 600 watt Crown (M600) amplifier to drive things. One problem with my approach was that my voice was asymmetric, and the big Crown was DC coupled. This resulted in a high amount of DC current flowing in the transformer primary (8 ohm tap to common), and saturation was evident. The fix was to AC couple the Crown to the transformer. I used two 10,000 Uf 100 VDC capacitors in series with the + sides together to in effect make a poor mans non polarized capacitor valued at 10,000 uf (not 5000). These big caps are a near short when reverse biased, so the series cap equation does not apply. Thereafter it worked like a hose...even at 200% positive peak modulation! Regards, Jim WD5JKO -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of Craig Roberts Sent: Sunday, January 22, 2006 11:28 AM To: Discussion of AM Radio; [EMAIL PROTECTED] Subject: [AMRadio] surrogate modualtor for the 32V Many thans for your reply, John. I've noted from the published specs that the driver and modulation transformers in the 32V-2 are rather restricted in audio bandwidth, too. Perhaps Steve Ickes' approach is worth exploring: http://www.amwindow.org/tech/htm/obmod.htm I have a very nice Ashly preamp/EQ/compressor/limiter and 120 Watt audio power amp that might work very well as a surrogate speech amp/modulator. Has anyone tried Steve's scheme? VY 73, Craig W3CRR __ 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: 267.14.21/236 - Release Date: 1/20/2006 -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.1.375 / Virus Database: 267.14.21/236 - Release Date: 1/20/2006
Re: [AMRadio] F/S SX101 Mark II
dang, I want that rx, but I have enough of them, and need to thin out my stable of rx's too LOL 73's Ronnie -- Original Message --- From: "Bob Peters" <[EMAIL PROTECTED]> To: "amradio" , "Boatanchors" <[EMAIL PROTECTED]> Sent: Sun, 22 Jan 2006 11:54:17 -0600 Subject: [AMRadio] F/S SX101 Mark II > I have a VERY nice SX101 that I need to pass on. It works very very > well. Cosmetics are a 9 +. Was owned by Dale W5LJ. Reason for sale is > that I just bought a JRC receiver. I will sell it if picked up in > Mesquite, TX for $300.00... If I have to ship it will be $350.00 due > to cost of packing material. I have a friend going to Jackson so > could be delivered there at NC...Other wise UPS charges will apply. > > Bob W1PE > 972-288-9911 > > __ > 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 --- End of Original Message ---
[AMRadio] F/S SX101 Mark II
I have a VERY nice SX101 that I need to pass on. It works very very well. Cosmetics are a 9 +. Was owned by Dale W5LJ. Reason for sale is that I just bought a JRC receiver. I will sell it if picked up in Mesquite, TX for $300.00... If I have to ship it will be $350.00 due to cost of packing material. I have a friend going to Jackson so could be delivered there at NC...Other wise UPS charges will apply. Bob W1PE 972-288-9911
[AMRadio] surrogate modualtor for the 32V
Many thans for your reply, John. I've noted from the published specs that the driver and modulation transformers in the 32V-2 are rather restricted in audio bandwidth, too. Perhaps Steve Ickes' approach is worth exploring: http://www.amwindow.org/tech/htm/obmod.htm I have a very nice Ashly preamp/EQ/compressor/limiter and 120 Watt audio power amp that might work very well as a surrogate speech amp/modulator. Has anyone tried Steve's scheme? VY 73, Craig W3CRR
RE: [AMRadio] 32V-2 speech amp question
I have not driven it externally before Craig but have some experience with the circuitry and the driver XFMR is a weak link in the circuit the XFMR barely has enough iron and coupling coefficiency in it to pass the low frequencies that the rig is designed for. As a matter of fact if the cathode resistor of the driver stage drops in resistance, as they or known to do with heat, the driver plate current will quickly saturate the driver XFMR causing the bass frequencies to look like a trapezoid instead of sine wave. If you were going to go with and outboard amplifier I would include a better driver XFMR as part of the external circuit and go to the grids directly. John Coleman -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Craig Roberts Sent: Saturday, January 21, 2006 10:19 PM To: Discussion of AM Radio Subject: [AMRadio] 32V-2 speech amp question Has anyone tried driving the mod input transformer of the 32V-2 (or V-3) directly with an outboard mic preamp? If so, what were the results, please? Many thanks and 73, Craig W3CRR __ 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
