[AMRadio] G5RV Ant Info
Will the balun in the G5RV ant handle 375 watt AM carrier?..tnx Ron
Re: [AMRadio] 2 watt carbon resistors
Would anyone on the list have a couple of 1200 ohm 2 or 3 W resistors to sell? Thanks in advance, George kb2z At 09:59 PM 5/27/05 -0400, you wrote: Greetings Going thru my junk box I came across a number of 1800 ohm, 2watt,10% carbon resistors. I will never use all of them. If anyone could use some of these, let me know off the list. Chuck wa2onk __ AMRadio mailing list Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net -- No virus found in this incoming message. Checked by AVG Anti-Virus. Version: 7.0.322 / Virus Database: 267.1.0 - Release Date: 5/27/05
Re: [AMRadio] G5RV Ant Info
You would have to check with the builder. In its original design the recommended balun consisted of about 6, 6 turns of coax where the coax met the ladder line. Good luck, George kb2z At 04:06 AM 5/28/05 -0400, you wrote: Will the balun in the G5RV ant handle 375 watt AM carrier?..tnx Ron __ AMRadio mailing list Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net -- No virus found in this incoming message. Checked by AVG Anti-Virus. Version: 7.0.322 / Virus Database: 267.1.0 - Release Date: 5/27/05
[AMRadio] 117GZT question...
gwt wrote: Yea, me too! hehe ;-) George KE4HJ John Coleman wrote: By The Way: I resemble, I mean resent, that remark about the gray hair and unsteady walk. John, WA5BXO My good friend... Have you taken a good, long, hard look in a mirror, lately? ;-) Why, I've been looking to you for help, information and guidance, for better'n twenny year, (and you wuz gray, then!) ;-) It's the conversion from Cowboy boots to Tennis shoes that makes you unsteady on yer tootsies... (grinnin, duckin' and running like hell!) ;-) --- 73 = Best Regards, -Geoff/W5OMR
[AMRadio] Price 20V
Have a possible opportunity to aquire a 20V transmitter. It's in pieces, but supposedly all the pieces are there. Any thoughts as to a low and high price for the transmitter? 73, Barrie, W7ALW
Re: [AMRadio] Price 20V
Hi Barrie, Earlier this year a friend of mine bought a 20V-2 for I think it was around $1200.00 He had to travel from Northwestern Il. to St. Louis to retrieve it. If yours is a 20V that means it is probably the lower power version than the -2. Being in pieces may be an advantage as it maybe easier to deal with using fewer people. I guess my considerations would be how close it is to you. How many pieces it's in? Is the cabinet totally taken apart? If all the tubes and meters are there. Also if you could get pictures of it to make sure it isn't a rust bucket full of mice nests. If you want to acquaint yourself with the 20V series of transmitters to know more of what you are looking at the manuals for the 20V, 20V-2 and 20V-3 are available for download on the Collins Collectors Association website: http://www.collinsradio.org/html/manuals.html They are down towards the bottom of the page. I also would be happy to take pictures of my 20V-2 that I hauled from North Wilkesboro, N.C. back to the Peoria Illinois area a few years ago. I would also be glad to answer any other questions that you may have. 73 Larry WA9VRH - Original Message - From: Barrie Smith [EMAIL PROTECTED] To: Discussion of AM Radio amradio@mailman.qth.net Sent: Saturday, May 28, 2005 2:52 PM Subject: [AMRadio] Price 20V Have a possible opportunity to aquire a 20V transmitter. It's in pieces, but supposedly all the pieces are there. Any thoughts as to a low and high price for the transmitter? 73, Barrie, W7ALW __ 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] Price 20V
Free to $2000 - Original Message - From: Barrie Smith [EMAIL PROTECTED] To: Discussion of AM Radio amradio@mailman.qth.net Sent: Saturday, May 28, 2005 3:52 PM Subject: [AMRadio] Price 20V Have a possible opportunity to aquire a 20V transmitter. It's in pieces, but supposedly all the pieces are there. Any thoughts as to a low and high price for the transmitter? 73, Barrie, W7ALW __ 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] Price 20V
Hey Bob. How's the refurb project going? g Bob Maser wrote: Free to $2000
[AMRadio] 117Z6 Globar Resistor update
Hi Guys, Here's an update on my attempt to limit the current to the 117Z6 in my old AM radio that I recently repaired and put back into service. As I mentioned earlier, I found a Globar resistor in my old tube caddy from my TV repair days. I installed it, and it works great! For some reason, years ago, I had noted on the card that it was packaged in, that it was 150 ohms cold and 6 ohms hot. Here's the data that was on the card: Workman Electronic Products Inc. - Sarasota, Fla. Model FR6 Hot current rating: 600ma According to the info on the package it was intended to be used for a Motorola TV and had the # 6B744326 on the card. That set me to thinking. It would be good to have some current limiting globar type devices in stock for old radios I plan to repair later on. So I got my current Mouser catalog out to see what might be available. Here's what I found: Page 389 - Thermometrics Thermistors and Sensors NTC Thermistors - and then a listing of the values available. Problem is, there is no mention of the current capabilities of these devices. It only gives the cold ohms. Just below that there is a listing for Inrush Current Limiters. It appears to me that this is what I should purchase, since the current handling capabilities are listed. And it looks to me like the Mouser stock number 527-CL90 would be the one to order. Although it does not list what the hot resistance is, it does list it at 2amps current handling. Can anyone on the list verify my choice before I acutally order them? Thanks, George KE4HJ
Re: [AMRadio] Price 20V
Depending on condition Free to 500 would be the best deal. Lots of work to convert. Great project, heavy and, of course, the Collins name. - Original Message - From: Bob Maser [EMAIL PROTECTED] To: Discussion of AM Radio amradio@mailman.qth.net Sent: Saturday, May 28, 2005 6:14 PM Subject: Re: [AMRadio] Price 20V Free to $2000 - Original Message - From: Barrie Smith [EMAIL PROTECTED] To: Discussion of AM Radio amradio@mailman.qth.net Sent: Saturday, May 28, 2005 3:52 PM Subject: [AMRadio] Price 20V Have a possible opportunity to aquire a 20V transmitter. It's in pieces, but supposedly all the pieces are there. Any thoughts as to a low and high price for the transmitter? 73, Barrie, W7ALW __ 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 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] Price 20V
I'm still looking for a dummy load. I found a 2500W load in Dayton and the price was right but it was really beat up so I passed on it. I got all of the heavy iron painted and looking good. Gary, you should see the inductors I found at Dayton. 7 diameter coil with 1/4 spacing, edge wound silver plated. One is 32 uH and the other one is 64 uH. They came out of a hi power Gates broadcast transmitter. Truly humungo. The pair for $30 plus $38 to ship it back via UPS. I think I am going to use the 32 coil in my 3CX3000 amp and add 160M. I am absolutely sure that there will be no arcs or other noises (maybe from the neighbors though). The 64 coil I plan to use on my HiTower look-a-like to get it on 160 in a L configuration. The coils are so nice I won't have to clean them up. Bob - Original Message - From: Gary Blau [EMAIL PROTECTED] To: Discussion of AM Radio amradio@mailman.qth.net Sent: Saturday, May 28, 2005 7:14 PM Subject: Re: [AMRadio] Price 20V Hey Bob. How's the refurb project going? g Bob Maser wrote: Free to $2000 __ 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] AM Shortwave
I built a few tube type home brew receivers a few years ago. I would say they are good performing receivers on AM, and would work very well on cw/ssb with a good product detector added. My receivers wound up working better than anything else I owned, or ever owned, so I sold off most of the vintage stuff. My receivers have digital readout, its very accurate, are stable, and extremely quiet. They have an S meter and bfo (for zero beating), are single conversion to 455Khz, and have low distortion detectors. Building them was the most fun I ever had at building radio equipment. I think its quite easy to build a good AM receiver, if you can find the basic parts (IF cans and power supply parts). Now, if you want general coverage, or to pick up weak signals with a crappy antenna, it gets more complex (and noisy). The IF filters are important, and I found filters made by Kiwa to work very well at a low price. Sometimes simple is better though, the homebrew receivers seem much better to me than the R390a I had, the icom 756 pro, the SX17 I had, or any of the regular ham type receivers I ever had, and I had quite a few in the past. By better I mean they pick up weak signals better, signals that are lost in the noise floor in the R390a or 756pro are easy to copy on the home brew. Fidelity is much better than the 756pro, slightly better than the R390A. If you build it, you can add the features you like, and design it to do what you want, for example, when I change bands between 160, 80 and 40 meters, it jumps between 1880,3880 and 7290 Khz. Tuning rate and range can be set to what you want. Digital display, analog display, modern look, vintage look, small or large size, whatever you want, just the way you want it! Brett N2DTS -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Byron Tatum Sent: Friday, May 27, 2005 10:15 PM To: AMRadio@mailman.qth.net Subject: [AMRadio] AM Shortwave Hello- Does anyone know of books, magazine articles or websites that have construction articles for homebrew shortwave tube and transistor radio sets? I would like to build a medium to high performance shortwave receiver. Are there any kits besides Ten-Tec? Thanks, Byron. __ AMRadio mailing list Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net
