Re: [AMRadio] Cleaning shack
Do you accept PayPal? Regards, Gary...WZ1M - Original Message - From: John Lyles [EMAIL PROTECTED] To: amradio@mailman.qth.net 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
Re: [AMRadio] Apache TX-1 Drive pot
I just happen to have one of these controls. It came out of a TX-1. $4.00 plus shipping. Regards, Gary...WZ1M - Original Message - From: W5OMR/Geoff [EMAIL PROTECTED] To: Discussion of AM Radio amradio@mailman.qth.net Sent: Tuesday, December 06, 2005 12:08 PM Subject: Re: [AMRadio] Apache TX-1 Drive pot Jim Wilhite wrote: You can get them from Mouser or Digi-Key Subject: [AMRadio] Apache TX-1 Drive pot Does anyone have one of these? Drive Control pot for the Heahtkit Apache TX-1 transmitter? If so, contact John/K5FTN. thanks. Mouser only has 25k 25w pots. John/K5FTN says he needs a 30k @ 50w pot for the Apache TX-1 xmtr. Digi-Key only goes up to 10k in 50w pots. Someone sent a solid-state replacement for that in the list, and I've not been able to find that message, again. If you would, please.. re-send? thanks, -Geoff/W5OMR __ 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
Re: [AMRadio] Drying out HV transformers / Chokes
Regular floor varnish works just fine. You have to thin it with Zylene. The motor repair shop is a baking varnish. I use nomex paper when insulating rewinds. Its expensive but very very reliable. The tar is nothing more than the stuff roofers use on flat roofs. Its applied hot and cools down to a durable application. Should be able to chip a pound or two of one of the plugs of tar. I bet they would give it to you. The nomex paper is about $12.00 for a small sheet. There are different thicknesses. Regards, Gary...WZ1M - Original Message - From: Larry Will [EMAIL PROTECTED] To: Discussion of AM Radio amradio@mailman.qth.net Sent: Sunday, September 18, 2005 7:49 PM Subject: Re: [AMRadio] Drying out HV transformers / Chokes Don, I found a source for transformer varnish on the internet. That varnish is very volatile and you may have trouble getting it as an individual. (the flash point is around 70 degrees with a spark as I remember and it has a short shelf life according to the mfgr.). I had no trouble but I am a licensed Professional Engineer. An option for the units is to find a motor rebuild shop. They usually have a 55 gallon drum of it that they dip the rewound motors into when they are done. I sure they would do it for you for a modest fee. I have no source on the tar or fish paper etc. Larry At 01:00 PM 9/18/2005, you wrote: Hello Larry and All, I have several 2.5v and 10v rusty,dirty, and rattling UTC small can S series filament transformers that I want rebuild and would like to know a source for transformer varnish and potting material, wax,tar, or whatever. On pulling the cover off the most rattling around one I found only sections of corrugated cardboard to be the packing/potting material !!. I would like to use something better and improve the heat transfer as these seem to be really small construction for the rated current. I intend to use the 10v units for 813/814/805 family. Any suggestions would be appreciated. Bill KB3DKS/1 -Original Message- From: Larry Will [EMAIL PROTECTED] To: [EMAIL PROTECTED]; Discussion of AM Radio amradio@mailman.qth.net Sent: Sun, 18 Sep 2005 10:41:41 -0400 Subject: Re: [AMRadio] Drying out HV transformers / Chokes Don, Here is the section in my article from ER Magazine on rebuilding an RCA BTA-1R1 on the homemade over I used with great sucess. all you need is a thermostatically controlled hotplate a thermometer and a hood. .from my RCA BTA-1R! article in ER. A check of all the iron with a 1000V 1000 megohm ohmmeter showed excessive leakage (less than 1000 megs) in the modulation reactor, the driver plate transformer, and the control transformer. The control transformer makes 110VAC for relays and lamps from the 240V input. The smaller transformers were baked in the kitchen oven at 140 degrees F for 5 hours. For the very heavy 50 henry modulation reactor, I fashioned a homemade oven using a thermostatically controlled single burner hotplate and a hood made from an old water heater jacket (Figure 1). This allowed me to cook the transformer out in the garage near the rig. An oven thermometer allowed me to set the oven temperature to 140 degrees F and after 25 hours of baking, the leakage was cured. All of these transformers and chokes were then dipped in transformer varnish to re-seal the winding from new moisture incursion. Regards, Larry W3LW __ 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 __ 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
Re: [AMRadio] Drying out HV transformers / Chokes
Speaking of HV trannys for the BC-610. I have one with a shorted secondary. My plans are to rewind this hunk of iron and turn the primary into a dual voltage, 115/230. This tranny is from the E model. Would I have anyone out there that mite be interested? Also, the transformer has those big beautiful cast endbells. Regards, Gary...WZ1M - Original Message - From: Geoff [EMAIL PROTECTED] To: Discussion of AM Radio amradio@mailman.qth.net Sent: Sunday, September 18, 2005 11:12 PM Subject: Re: [AMRadio] Drying out HV transformers / Chokes Barrie Smith wrote: Are you sure you're talking about a BC-610 modulation transformer? I just took the back off of my HT-4B, which is similar to the BC-610, to take a look at the modulation transformer. It looks like a pick up with one hand object to me. BC-610 Plate Transformer, is what they were talking about, and it's -not- a ['pick up with one hand'] critter. Neither, for that matter, is the '610 Mod xfrmr, but it -is- smaller than the plate xfrmr. -- 73 = Best Regards, -Geoff/W5OMR __ 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
Re: [AMRadio] Drying out HV transformers / Chokes
Read it closely, MY PLANS ARE TO REWIND IT. Thats about as plane as it gets. Regards, Gary...WZ1M - Original Message - From: Geoff [EMAIL PROTECTED] To: Discussion of AM Radio amradio@mailman.qth.net Sent: Monday, September 19, 2005 5:50 PM Subject: Re: [AMRadio] Drying out HV transformers / Chokes GBrown wrote: Speaking of HV trannys for the BC-610. I have one with a shorted secondary. My plans are to rewind this hunk of iron and turn the primary into a dual voltage, 115/230. This tranny is from the E model. Would I have anyone out there that mite be interested? Also, the transformer has those big beautiful cast endbells. interested... in? rewinding it? Buying it? rewinding and retapping it for dual primaries? ya gotta talk a bit clearer than that, to communicate ;-) -- 73 = Best Regards, -Geoff/W5OMR __ 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
Re: [AMRadio] part needed
Ronnie: What's the voltage a mils rating your looking for? I mite have one on the shelf. Regards, Gary...WZ1M - Original Message - From: ronnie.hull [EMAIL PROTECTED] To: amradio@mailman.qth.net Sent: Sunday, September 11, 2005 9:47 AM Subject: [AMRadio] part needed anyone out there have a utc s-51 bias transformer they will part with? thanks w5sum Ronnie __ AMRadio mailing list Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net
Re: [AMRadio] A bit of Viking Valiant help
Just a wild a-- guess, but I thought that the Valiant used only 6146's, not the B 6146. It is my understanding that sometimes subbing in the 'B for the early 6146 just doesn't cut the mustard. Regards, Gary...WZ1M - Original Message - From: John Lawson [EMAIL PROTECTED] To: amradio@mailman.qth.net Sent: Saturday, August 27, 2005 1:56 PM Subject: [AMRadio] A bit of Viking Valiant help I'm in the middle of a long, slow project to get my Valiant back in service. I've changed out the bigger power tubes, solid-state replacements for the 866s, and partially re-capped the rig, specifically the RF power section. After finding (expensively) out that 'W' 6146s just don't work, I replaced the finals with new 'B's and power is now being transferred to the antenna / dummy load. Main bug: On the bands below 20M, however, and getting 'worse' as the frequency gets lower, the rig runs away after 15 - 30 seconds - the plate current rises fatser and faster and then needs to be shut down, lest another set of 6146s gets wasted. ;} I have neutralized the transmitter per the manual, seems ok. Bias also set per sepc. LV rectifier tubes have been chacked (on a Weston 686) and seem within spec, though their performance under load is measurable only in situ. I left the doorknob cap alone because it's fine electrically and not cracked or discolored. Do the sypmtoms sound familiar to anyone? Before I spend a bunch more hours wearing out the transmit switch, I thought I'd ask those who have a lot more experience than I do with the Valiant. I can add more info/observations as needed, specific caps replaced, etc. Thanks all! Cheers John KB6SCO __ AMRadio mailing list Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net
Re: [AMRadio] Need Ceramic Disk Caps
Hi Ron: www.justradios.com has them in mica 1600 volts, 4000 pf. There about $3.50/each. Regards, Gary...WZ1M - Original Message - From: [EMAIL PROTECTED] To: amradio@mailman.qth.net Sent: Wednesday, August 10, 2005 4:08 AM Subject: [AMRadio] Need Ceramic Disk Caps I am in need of 4ea. .004 [EMAIL PROTECTED] Ceramic Disk Caps...tnx Ron w6MAU __ AMRadio mailing list Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net
Re: [AMRadio] Viking 2 Switch
Ron:: While I look for the knob, I believe I also have the meter switch. Regards, Gary...WZ1M - Original Message - From: [EMAIL PROTECTED] To: amradio@mailman.qth.net Sent: Saturday, March 19, 2005 10:14 PM Subject: [AMRadio] Viking 2 Switch I am putting another Viking2 on the air and I need the meter function switch...Any out there?..Tnx es 73's Ron W6MAU __ AMRadio mailing list Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net
Re: [AMRadio] Meter Switch Part #
Ron: I think I have an original switch for the Viking II. Email me direct. Regards, Gary...WZ1M - Original Message - From: [EMAIL PROTECTED] To: amradio@mailman.qth.net Sent: Tuesday, February 15, 2005 1:31 PM Subject: [AMRadio] Meter Switch Part # Does anyone know the Centralab part number for the Meter switch in the Johnson viking 2?..Tnx es 73's..Ron W6MAU __ AMRadio mailing list Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net
[AMRadio] FS: 100TH Eimacs.
I have two, 100TH eimacs. I believe these to be NOS tubes. I dont have the complete boxes but the tubes are still wraped in there protective cover. Not expecting to make a million bucks on these. No reasonable offer refused. Take care, Gary
Re: [AMRadio] tubes needed
Hi Ronnie: Gary, WZ1M here. I mite have the tubes. Ill check and get back at ya. Regards, Gary - Original Message - From: w5sum [EMAIL PROTECTED] To: amradio@mailman.qth.net Sent: Thursday, December 18, 2003 9:48 AM Subject: [AMRadio] tubes needed howdy y'all I am in need of a 6C10 and a 6EW6 anyone have these to spare? thanks Ronnie - W5SUM The AM voice of Shreveport, Louisiana USA formerly WN5AIA and WB5AIA I got my Extra Class the old fashioned way... I earned it! ___ AMRadio mailing list AMRadio@mailman.qth.net http://mailman.qth.net/mailman/listinfo/amradio
