Re: [AMRadio] Factory Wired Ranger
Wow - I see a Valiant there too and only $1275.00 ! Please, take a look at this one: http://amfone.net/Amforum/index.php?board=33.0 Thanks, Rick/K5IZ __ AMRadio mailing list List Home: http://mailman.qth.net/mailman/listinfo/amradio Partner Website: http://www.amfone.net Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net __ AMRadio mailing list List Home: http://mailman.qth.net/mailman/listinfo/amradio Partner Website: http://www.amfone.net Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net
[AMRadio] AM T SHIRTS
Hi Guys still have some T Shirts left. I have Large, X Large and XX Large and one XXXL. The shirts are $11 For L and XL and $12 for XXL. Shipping via priority mail is $4.50. The logo can be seen on my Web site under the W1PE Forum and then go to the AM Portion. It is the Tung Sol Tube logo with AM GLOWS IN THE DARK on a Navy shirt. Really cam out good.Show off your AM at Hamfests. Thanks for reading... Very Best 73's Bob W1PE www.w1pe.com __ AMRadio mailing list List Home: http://mailman.qth.net/mailman/listinfo/amradio Partner Website: http://www.amfone.net Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net
[AMRadio] Free tower + Yagi
Hi all: FREE for the taking. Tower is about 35? feet...tilt-over...with what looks like a tri-band Yagi. Presently attached to house. Location - New Jersey. Please contact me if interested. Regards, Steve WA2TAK __ AMRadio mailing list List Home: http://mailman.qth.net/mailman/listinfo/amradio Partner Website: http://www.amfone.net Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net
[AMRadio] TR Switch
Does anyone happen to have a picture of the inside of the Johnson TR Switch 250-39? I have one I bought a while back that has been modified with a different power transformer (among other things!) and I don't have any idea what the old one looked like. The one they used is a half wave isolation transformer and the schematic calls for a full wave transformer, but I don't know what voltage. I would sure appreciate any actual pictures of the inside top and bottom. Thanks, Rick/K5IZ __ AMRadio mailing list List Home: http://mailman.qth.net/mailman/listinfo/amradio Partner Website: http://www.amfone.net Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net
Re: [AMRadio] TR Switch
If I remember correctly, there is a chart on the back side of the instruction sheet, just above the schematic, that provides the voltage information (AC and DC) that you need. As long as the physical replacement fits into the cabinet with close enough voltages, that would be the most important consideration. Pete, wa2cwa On Mon, 30 Oct 2006 11:49:52 -0600 Rick Brashear [EMAIL PROTECTED] writes: Does anyone happen to have a picture of the inside of the Johnson TR Switch 250-39? I have one I bought a while back that has been modified with a different power transformer (among other things!) and I don't have any idea what the old one looked like. The one they used is a half wave isolation transformer and the schematic calls for a full wave transformer, but I don't know what voltage. I would sure appreciate any actual pictures of the inside top and bottom. Thanks, Rick/K5IZ __ AMRadio mailing list List Home: http://mailman.qth.net/mailman/listinfo/amradio Partner Website: http://www.amfone.net Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net
[AMRadio] Massillon Ohio Hamfest Report
I went to the Massillon Ohio hamfest yesterday--a beautiful day for a drive across Western PA and into Eastern Ohio. Massillon is a solid 2 hours and 15 minutes drive for me so it's further than I want to go for a hamfest. But I was itching for a good hamfest and the timing was right so I went. And I'm glad I did. The fest is in the 2 gynmasiums of the Massillon Boys and Girls Club. It's simple to find and a perfect facility for a hamfest. They had probably 125 tables set up and I heard that they were all sold, though 10% or so were no-shows. The Massillon club did a good job staffing the fest and the whole thing was very well organized. Estimating attendance is hazardous business, but I'd guess it was in the 3-400 range--doggone good, I think. Boatanchors were out in force. Here's what I remember, though I know I'm missing a bunch: Collins 75S3B with 32S1 and the AC supply $1275 sold Collins 75A3 in great shape $650 unsold Collins 75A2 in ok shape with no cabinet. $350 sold 2 Drake L4B amps in nice shape. One sold for $550 Drake TR-4s of various stripes unsold Drake B-lines, C-lines and accessories, all unsold, I think Many Heathkit monobanders $40-$60 One may have sold. Gonset Tri-Band HF RX with wrong knob $75 unsold Various Gonset converters--$20 each one sold NC-109 with speaker (forget the price) unsold NC-300 in mediocre shape $250 unsold Hallicrafters SX-71 in beautiful shape $265 unsold SB-301, SB-101, SB-102, HP-23 supplies $175--$200 each, all unsold I think Various Hickok test gear, unsold Heathkit Mohawk RX near mint $300 (see below) HT-32 TX in good shape, untested (mine) $100 sold Military Navy WWII RBB RX in ok shape (mine) $100 sold VHF ARC-5 command RX $25 unsold--missing one side ARC-5 Q-5er $25 unsold CE 458 VFO for the 10B/20A--no cabinet, otherwise nice. $35 sold CE 10B in nice shape $75 unsold, I think HP 8640B signal gen in mil cabinet $225 sold Tek 24xx digital storage 'scope $300 unsold. Various tek 'scope plug-ins unsold HP 275mhz 'scope didn't get price unsold Old time hamfests used to always have an auction running simultaneously with the hamfest and the Massillon club has the only hamfest I know of that has maintained that tradition. Perry Ballinger is the auctioneer. Anyone wanting to auction anything could just go into the other gymnasium and set it on the tables arrayed for that purpose along one wall. By the time the auction started at 9AM, 3/4 of the tables along one long wall were full to overflowing with all manner of stuff--but mostly small parts and strange oddiments. There was one thing in the auction that I wanted--a homebrew rack transmitter in a 5 foot tall cabinet with PP 813's in the final. It was (and is) beautifully built but the power supply and cabling between the chasses was unfinished. I and others suspected that it had never been on the air. I also found an original SCR-274N cable with the right connectors on both ends in one of the junk boxes. So I hung around and picked up both items from the auction--the cable for $5 and the rack TX for an incredibly reasonable $50. Other stuff seen in the auction Atlas 210X with console $75 Atlas 215x with mobile mount and AC PS $85 Swan 500cx with PS and bad S-meter $70 Hallicrafters S-38B Various wooden antique broadcast radios Caps, knobs, AC power distribution stuff, much more While I was in the auction, waiting for the stuff I wanted to come up for bid, my son Mishe was manning my table. Every time something would sell, he'd come running over and give me the money. First $20, then $100, then $40,, etc. By his third or fourth trip, the audience was in stitches and calling out for him to give them the money. It was pretty funny. I ended up spending more than I wanted to--but it couldn't be helped (yea, right...). A friend of mine who is retired from the merchant marine showed up with a very nice RCA Radiomarine 8506-B receiver with cabinet and shockmount. I like RCA stuff and couldn't resist for $100. Another guy had 2 SCR-274N transmitters that looked like new and were unmodified for $25 each. Neither one is a ham band TX, but I am assembling parts for an SCR-274N station and had to buy them just in case. I also found this neat Gonset accessory that is a combination code practice oscillator and station monitor for $5. Finally, we had packed the minivan and I went in to go to the bathroom. The guy with the Mohawk had marked it down to $250. I stopped to look and he said look inside, opening the lid. It was clean enough to eat off of inside--sparkling, like new. For the first time, I gave it a good going over on the outside and realized, with the the exception of two very light scratches on top of the cabinet, I was looking at a near-mint original Mohwak. The seller gave me a sob story about how his friend gave it to him to sell and he couldn't take less than $200 for it. So I offered $150. And we settled on $190. It has the original manual and the original tuner assembly manual--also both near-mint.
[AMRadio] Oops!
I don't know exactly where my brain was when I was calculating the size of transformer I need for the TR Switch, but it obviously wasn't with me! Let me try again. I need a two (2) hole flange mount transformer with approximately 225-0-225 volt secondary and a 6.3 volt filament winding. The mounting holes need to be at least 2.75 and no more than 2.81 inches apart. Thanks for any help you can give. Rick/K5IZ __ AMRadio mailing list List Home: http://mailman.qth.net/mailman/listinfo/amradio Partner Website: http://www.amfone.net Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net
Re: [AMRadio] Massillon Ohio Hamfest Report
Nice report. Thanks Don __ AMRadio mailing list List Home: http://mailman.qth.net/mailman/listinfo/amradio Partner Website: http://www.amfone.net Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net
[AMRadio] Re: GB Massillon Ohio Hamfest Report
Hey Don, I can beat you - I drove all the way from Madison, Wisconsin to the Massillon hamfest. I got started in ham radio 30 years ago in that town, and have always enjoyed that hamfest. This time I was driving my mom back to her house, so it was just coincidence that I was there yesterday. My old friends and I especially enjoyed the auction this time. For those that were there I was the guy in the blue shirt that was periodically causing trouble by waving a rubber monkey to bid. Steve, WD8DAS __ AMRadio mailing list List Home: http://mailman.qth.net/mailman/listinfo/amradio Partner Website: http://www.amfone.net Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net
[AMRadio] 220 volt AC Power Question
Hi all, I am building an amplifier that has a combination of 220 volt and 120 volt transformers. The HV plate supply is 220V, and the rest is 120V. I will be keying the plate supply. My 220V outlet has phase, phase, and ground. There is NO neutral. The outlet is not a GFCI outlet so ground current will work, BUT. The BUT here is whether this is legal with the National Electric Code? Before you say NO, consider the electric clothes dryer. These all run off 220V, and have 3 prong power cords. I have heard that in some dryers there are 120 volt loads (lights, and timer) as well as 220V (heater and motor). If this is true, then my approach must be OK so long as my power switch uses a DPST switch and (double fuses)to insure everything is off when it is in the OFF position. Comments please... BTW, I do have a 240/120 autotransformer of suitable size (VA rating), but space does not permit it's use. Jim JKO -- No virus found in this outgoing message. Checked by AVG Free Edition. __ AMRadio mailing list List Home: http://mailman.qth.net/mailman/listinfo/amradio Partner Website: http://www.amfone.net Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net
Re: [AMRadio] 220 volt AC Power Question
Jim I do not know the laws but all new dryers have four wire cords. Only the old ones are three. The ground wire would need to be twice as big as either hot wire. By the codes I don't think you can use a neutral for fault current. At the box, the neutral and ground are tied together. Most stoves and dryers are 220 and the third wire is for the fuse blowing function only but there must be exceptions. Hope the electricians let you know exactly. 73 Mike - Original Message - From: Jim candela [EMAIL PROTECTED] To: Discussion of AM Radio in the Amateur Service amradio@mailman.qth.net Sent: Monday, October 30, 2006 8:09 PM Subject: [AMRadio] 220 volt AC Power Question Hi all, I am building an amplifier that has a combination of 220 volt and 120 volt transformers. The HV plate supply is 220V, and the rest is 120V. I will be keying the plate supply. My 220V outlet has phase, phase, and ground. There is NO neutral. The outlet is not a GFCI outlet so ground current will work, BUT. The BUT here is whether this is legal with the National Electric Code? Before you say NO, consider the electric clothes dryer. These all run off 220V, and have 3 prong power cords. I have heard that in some dryers there are 120 volt loads (lights, and timer) as well as 220V (heater and motor). If this is true, then my approach must be OK so long as my power switch uses a DPST switch and (double fuses)to insure everything is off when it is in the OFF position. Comments please... BTW, I do have a 240/120 autotransformer of suitable size (VA rating), but space does not permit it's use. Jim JKO -- No virus found in this outgoing message. Checked by AVG Free Edition. __ AMRadio mailing list List Home: http://mailman.qth.net/mailman/listinfo/amradio Partner Website: http://www.amfone.net Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net __ AMRadio mailing list List Home: http://mailman.qth.net/mailman/listinfo/amradio Partner Website: http://www.amfone.net Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net
Re: [AMRadio] 220 volt AC Power Question
This does not meet the code. A ground wire can never be used to carry load. Also, your ground wire is probably bare. A neutral conductor must be insulated. Darrell, WA5VGO At 07:09 PM 10/30/2006 -0600, you wrote: Hi all, I am building an amplifier that has a combination of 220 volt and 120 volt transformers. The HV plate supply is 220V, and the rest is 120V. I will be keying the plate supply. My 220V outlet has phase, phase, and ground. There is NO neutral. The outlet is not a GFCI outlet so ground current will work, BUT. The BUT here is whether this is legal with the National Electric Code? Before you say NO, consider the electric clothes dryer. These all run off 220V, and have 3 prong power cords. I have heard that in some dryers there are 120 volt loads (lights, and timer) as well as 220V (heater and motor). If this is true, then my approach must be OK so long as my power switch uses a DPST switch and (double fuses)to insure everything is off when it is in the OFF position. Comments please... BTW, I do have a 240/120 autotransformer of suitable size (VA rating), but space does not permit it's use. Jim JKO -- No virus found in this outgoing message. Checked by AVG Free Edition. __ AMRadio mailing list List Home: http://mailman.qth.net/mailman/listinfo/amradio Partner Website: http://www.amfone.net Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net __ AMRadio mailing list List Home: http://mailman.qth.net/mailman/listinfo/amradio Partner Website: http://www.amfone.net Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net
Re: [AMRadio] 220 volt AC Power Question
Hi Jim, I understand that the update to the National Electrical Code now dictates that all NEW work 220V outlets have a neutral in addition to the ground. This makes good sense, especially in light of your email. Buy the way, legal or not, The Collins 30S-1 amp had an internal 120V outlet under a shelf in the power supply. This was to facilitate installing the power supply for a KWM-1 within the amplifier PS cabinet. I don't doubt that other manufacturers and homebrewers do similar things with blowers, relays and control circuits. Dangerous? I suppose under the right circumstances it could be. For once, I can go along with the NEC folks. 73 and stay safe, John, W4AWM __ AMRadio mailing list List Home: http://mailman.qth.net/mailman/listinfo/amradio Partner Website: http://www.amfone.net Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net
Re: [AMRadio] 220 volt AC Power Question
Jim As coincidence would have it I'm working on a Harris/Gates HFL1000 amplifier that can be wired to run off either 120 or 240 volts. The unit has some 120 volt only transformers, blowers, relays and other circuits. The way they handle this when operating on 240 is to use a 240/120 autotransformer. Jay W1VD - Original Message - From: Jim candela [EMAIL PROTECTED] To: Discussion of AM Radio in the Amateur Service amradio@mailman.qth.net Sent: Monday, October 30, 2006 8:09 PM Subject: [AMRadio] 220 volt AC Power Question Hi all, I am building an amplifier that has a combination of 220 volt and 120 volt transformers. The HV plate supply is 220V, and the rest is 120V. I will be keying the plate supply. My 220V outlet has phase, phase, and ground. There is NO neutral. The outlet is not a GFCI outlet so ground current will work, BUT. The BUT here is whether this is legal with the National Electric Code? Before you say NO, consider the electric clothes dryer. These all run off 220V, and have 3 prong power cords. I have heard that in some dryers there are 120 volt loads (lights, and timer) as well as 220V (heater and motor). If this is true, then my approach must be OK so long as my power switch uses a DPST switch and (double fuses)to insure everything is off when it is in the OFF position. Comments please... BTW, I do have a 240/120 autotransformer of suitable size (VA rating), but space does not permit it's use. Jim JKO -- No virus found in this outgoing message. Checked by AVG Free Edition. __ AMRadio mailing list List Home: http://mailman.qth.net/mailman/listinfo/amradio Partner Website: http://www.amfone.net Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net __ AMRadio mailing list List Home: http://mailman.qth.net/mailman/listinfo/amradio Partner Website: http://www.amfone.net Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net
Re: [AMRadio] 220 volt AC Power Question
Hi All, John is correct. See NEC 250.138 and 250.140. It was common in old equipment (my Heath SB220 is a good example) to have the control circuits (PTT Relay) use the grounding (green) conductor for a return. No longer permitted. 4 conductor plug/receptacle required. The green wire (grounding conductor) is just that - grounding. Referencing the dryer example, for old dryers, NEC says you must disconnect the bonding between neutral (the 120V stuff) and the cabinet grounding conductor within the dryer even with the 4 prong plug. Basically the green wire is only a safety ground. There should never be any circuit current flowing through that conductor. Hope that helps. Regards, Larry At 08:50 PM 10/30/2006, you wrote: Hi Jim, I understand that the update to the National Electrical Code now dictates that all NEW work 220V outlets have a neutral in addition to the ground. This makes good sense, especially in light of your email. Buy the way, legal or not, The Collins 30S-1 amp had an internal 120V outlet under a shelf in the power supply. This was to facilitate installing the power supply for a KWM-1 within the amplifier PS cabinet. I don't doubt that other manufacturers and homebrewers do similar things with blowers, relays and control circuits. Dangerous? I suppose under the right circumstances it could be. For once, I can go along with the NEC folks. 73 and stay safe, John, W4AWM __ AMRadio mailing list List Home: http://mailman.qth.net/mailman/listinfo/amradio Partner Website: http://www.amfone.net Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net __ AMRadio mailing list List Home: http://mailman.qth.net/mailman/listinfo/amradio Partner Website: http://www.amfone.net Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net
Re: [AMRadio] 220 volt AC Power Question
Hi Said Jim, I meant John.. Another advantage, in tracing down excessive noise on 40 M with a ham buddy in Maine this summer I found several cases of neutrals and grounds tied together (at locations besides the main panel) throughout the house and shack. Clearing those (and some other stuff) reduced ambient noise from S7-9 to S3 on his 40M rotating dipole. Larry At 08:50 PM 10/30/2006, you wrote: Hi Jim, I understand that the update to the National Electrical Code now dictates that all NEW work 220V outlets have a neutral in addition to the ground. This makes good sense, especially in light of your email. Buy the way, legal or not, The Collins 30S-1 amp had an internal 120V outlet under a shelf in the power supply. This was to facilitate installing the power supply for a KWM-1 within the amplifier PS cabinet. I don't doubt that other manufacturers and homebrewers do similar things with blowers, relays and control circuits. Dangerous? I suppose under the right circumstances it could be. For once, I can go along with the NEC folks. 73 and stay safe, John, W4AWM __ AMRadio mailing list List Home: http://mailman.qth.net/mailman/listinfo/amradio Partner Website: http://www.amfone.net Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net __ AMRadio mailing list List Home: http://mailman.qth.net/mailman/listinfo/amradio Partner Website: http://www.amfone.net Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net
RE: [AMRadio] 220 volt AC Power Question
That is the way I am running mine Jim. I have two power supplies (MOD/FINAL) 120 VOLT AC each and I run one from each leg of the 220 and a common line for the return. (Three Wire). The plate relay/contactor is a three phase relay/switch but only 2 of the contactors are active of course. The earth/safety ground is a separate wire that is connected to a ground stake outside the shack. I guess I could have run separate return along with each hot leg but I don't know why I should. I use a clothes dryer plug and pigtail for mine. The Filament XFMRS for the rectifiers, finals, and modulators all run from the same phase as the modulator plate supply. And the final plate supply is on the other phase. There are breakers at the pole and a 3 phase breaker in the rig. Only two lines in use; Common stays connected at all times. By the way I do not use a transformer for bias supply for either the final or for the modulator. Bias supply comes from diodes that are connected through limit resistors from the 120V AC hot line. Chassis is connected to common AC and earth ground at all times. John, WA5BXO -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Jim candela Sent: Monday, October 30, 2006 7:10 PM To: Discussion of AM Radio in the Amateur Service Subject: [AMRadio] 220 volt AC Power Question Hi all, I am building an amplifier that has a combination of 220 volt and 120 volt transformers. The HV plate supply is 220V, and the rest is 120V. I will be keying the plate supply. My 220V outlet has phase, phase, and ground. There is NO neutral. The outlet is not a GFCI outlet so ground current will work, BUT. The BUT here is whether this is legal with the National Electric Code? Before you say NO, consider the electric clothes dryer. These all run off 220V, and have 3 prong power cords. I have heard that in some dryers there are 120 volt loads (lights, and timer) as well as 220V (heater and motor). If this is true, then my approach must be OK so long as my power switch uses a DPST switch and (double fuses)to insure everything is off when it is in the OFF position. Comments please... Jim JKO __ AMRadio mailing list List Home: http://mailman.qth.net/mailman/listinfo/amradio Partner Website: http://www.amfone.net Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net
