[AMRadio] Home Brew 4-1000 amp
From: Byron Lichtenwalner [EMAIL PROTECTED] To: amradio@mailman.qth.net Subject: Home Brew 4-1000 amp Date: Thursday, May 26, 2005 12:20 AM Friends Yesterday I bought a great looking amp (see http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItemitem=5775631689ssPageName=ADME:B:EOAB:US:6 ) , only to find I had misunderstood the shipping costs. It is now mine, but stranded in Arizona. If anyone is interested, make me an offer. The best offer will get it, but you get to pay the shipping, or better pick it up. It's a 400 pound (approximate) monster. Private responses please to [EMAIL PROTECTED] Best offer by Friday at 8 A.M. gets it. Byron, W3WKR
[AMRadio] Pearce-Simpson Bimini-550
If anyone needs a copy of the schematic for Pearce-Simpson Bimini-550 AM radiotelephone, contact me off-list. I have a scanned a copy of the diagram into a 85k PDF file. 73, Mark KB4CVN __ Do you Yahoo!? Yahoo! Small Business - Try our new Resources site http://smallbusiness.yahoo.com/resources/
Re: [AMRadio] 117Z6GT question
This is normal. The cold resistance is always much less than normal. In a transmitting tube it is called in-rush. For the larger tubes some sort of protection is usually used, or at least a filament transformer no larger than necessary. The tube you are using has a 117 volt filament. 73 Mike - Original Message - From: gwt [EMAIL PROTECTED] To: AM Radio List amradio@mailman.qth.net Sent: Thursday, May 26, 2005 1:10 PM Subject: [AMRadio] 117Z6GT question I have a question for the list. I'm repairing an old am radio that uses at 117Z6GT as a rectifier. I have the radio working again, but I notice when I turn it on that the 117Z6 filaments glow really bright for a couple of seconds. Then settle down to what you would expect to see, a red glow. I don't have any experience with this tube, or how it should act at turn on. It what I'm seeing a normal condition? Thanks, George KE4HJ __ 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] 117Z6GT question
Thanks for the info! George KE4HJ Radio Station KW1I wrote: Yes, it's normal. - Original Message - From: gwt [EMAIL PROTECTED] To: AM Radio List amradio@mailman.qth.net Sent: Thursday, May 26, 2005 1:10 PM Subject: [AMRadio] 117Z6GT question I have a question for the list. I'm repairing an old am radio that uses at 117Z6GT as a rectifier. I have the radio working again, but I notice when I turn it on that the 117Z6 filaments glow really bright for a couple of seconds. Then settle down to what you would expect to see, a red glow. I don't have any experience with this tube, or how it should act at turn on. It what I'm seeing a normal condition? Thanks, George KE4HJ __ 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] 117Z6GT question
George: You might search around for some old Globar resistors. Install on the input line and they will absorb some of that inrush resulting in longer life for the tubes. I found a card of them (they were in little packets that one pulled off like the pull tabs you bought at the beer joint) in little bags. They were used in TV sets and AC/DC radios. Check for a parts store that has been in business for a long time and find the guy with gray hair and an unsteady walk. He will know what you are talking about. 73 Jim W5JO I'm repairing an old am radio that uses at 117Z6GT as a rectifier. I have the radio working again, but I notice when I turn it 117Z6 filaments glow really bright for a couple of seconds. Then settle down to what you would expect to see, a red glow. I don't have any experience with this tube, or how it should act at turn on. It what I'm seeing a normal condition? Thanks, George KE4HJ __
[AMRadio] Re: Pete's playing (sort of)
On Thu, 26 May 2005 04:49:30 -0700 (PDT) VJB [EMAIL PROTECTED] writes: Pete, I can't remember making any requests to the League that would be of benefit only to myself. Didn't say it would only benefit yourself. I said you desire that one-on-one personal attention direct from Newington It's kinda like filing comments with the FCC, some people talk a lot, some people take action. Have you ever participated on behalf of the hobby in a rulemaking proceeding, Pete? I can't find you anywhere listed. Maybe you're too busy defending the League to actually, uh, take some action. There's been little before the FCC over the last ten years that has tweaked me enough to submit comments to them. However, as my Director had stated in the Grassroots forum at Dayton, I generally direct my comments and concerns on various HR bills and issues like BPL to my US representatives and/or US senators. Part of my Director's, Frank Fallon, pitch at Dayton: Fallon said ARRL members need to get very vocal about legislative issues of importance to Amateur Radio. One way to do that is by visiting, writing, e-mailing or faxing their US representatives or US senators. Your letters, e-mails and visits to district offices give us entrée to legislators in Washington, he said. It won't happen without your help. Personal visits to lawmakers at their district offices, he said, help to put a face on ham radio for politicians. The grassroots lobbying effort now being going into place will work from the ARRL Division level through a Division Legislative Action Chair, then down to a State Legislative Action Coordinator, who will have help from Legislative Action Coordinator Assistants. The focus will be on measures that deal with FCC matters, because Congress oversees the Commission. To read the full text, go here: http://www.remote.arrl.org/news/stories/2005/05/20/1/?nc=1 Personally Paul, based on our past dialogue, your Director, for all practical purposes, is nothing more than a stone bump. You should try approaching your Vice-Director with your issues and concerns and see what type of reaction and dialogue you get. Vice-Directors have little to no power but does have the Director's ear and does sit in on most of the BoD meetings. Since you are an ARRL member, there is nothing stopping you from announcing your candidacy to run for Director of your Division. Personally I think you would make a great Director and add a breath of fresh air to a somewhat, at times, stodgy and rubber stamp set of current members of the Board. By getting out your thoughts and ideas to local clubs and hamfests in your Division, you can make others aware of the inadequacy of the current Director and/or Vice-Director, and at the very least, raise the awareness to the Director that his current methods of conveying information to and from his members is not working. Remember though, if elected, you'll have to work for free, but you'll have a direct hand to shaping ARRL direction, policies, and amateur radio's future. Pete, wa2cwa Best wishes, Paul Message: 1 Date: Wed, 25 May 2005 15:38:19 -0400 From: peter markavage [EMAIL PROTECTED] Subject: Re: [AMRadio] Hudson Communicates To: amradio@mailman.qth.net Message-ID: [EMAIL PROTECTED] Content-Type: text/plain; charset=us-ascii On Tue, 17 May 2005 05:46:29 -0700 (PDT) VJB [EMAIL PROTECTED] writes: Okay Pete, so the Hudson Division communicates. If their example were followed by the other 95 percent of the system I wouldn't have a complaint and neither would so many other disappointed people who wish to support the League. If your Director and Vice Director are not doing their job, vote someone in who will. Their terms only last 3 years. Instead, we see every possible effort to keep it a closed door Masonic-style secret club whose activities are presented to members to react to, not to participate in. Funny, with all your posts here, there, and everywhere, it seems you are participating, but, for some reason, you desire that one-on-one personal attention direct from Newington. If everyone wanted that personal attention, they would probably have to hire more staff. Pete, wa2cwa
[AMRadio] Globar brand thermistors
Those things are really pretty cool. I think they are around 100 ohms cold and about 1 ohm hot at up to 3 amps. They are great for the primary of filament XFMRs for Xmitting tubes. I used to use them all the time. We kept them in stock for the degaussing circuits in TV repair but I haven't seen them for a long time. John Coleman, WA5BXO -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Jim Wilhite Sent: Thursday, May 26, 2005 1:41 PM To: Discussion of AM Radio Subject: Re: [AMRadio] 117Z6GT question George: You might search around for some old Globar resistors. Install on the input line and they will absorb some of that inrush resulting in longer life for the tubes. I found a card of them (they were in little packets that one pulled off like the pull tabs you bought at the beer joint) in little bags. They were used in TV sets and AC/DC radios. Check for a parts store that has been in business for a long time and find the guy with gray hair and an unsteady walk. He will know what you are talking about. 73 Jim W5JO
RE: [AMRadio] 117Z6GT question
By The Way: I resemble, I mean resent, that remark about the gray hair and unsteady walk. John, WA5BXO
Re: [AMRadio] Globar brand thermistors
Cold resistances varied some. Hallicrafters used them in TV sets as well as AC/DC sets, as did other manufacturers Cold resistance varied from just over 100 ohms to about 85, if memory serves correct. I found several at a parts store where I lived before and a friend of mine wanted several. I don't think he wanted as many as I sent, but he is supplied for life. Those of you who have old stores in their areas might check. Perfect for what John mentioned and for the AC sets with no transformer such as the Scott SLRM. 73 Jim W5JO - Original Message - From: John Coleman [EMAIL PROTECTED] To: 'Discussion of AM Radio' amradio@mailman.qth.net Sent: Thursday, May 26, 2005 3:20 PM Subject: [AMRadio] Globar brand thermistors Those things are really pretty cool. I think they are around 100 ohms cold and about 1 ohm hot at up to 3 amps. They are great for the primary of filament XFMRs for Xmitting tubes. I used to use them all the time. We kept them in stock for the degaussing circuits in TV repair but I haven't seen them for a long time. John Coleman, WA5BXO
Re: [AMRadio] 117Z6GT question
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 __ 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] Globar brand thermistors
One thing about those Globar units - the type you want for the filament string is not the same as the type you want for the degausser. You want an NTC (negative temperature coefficient) type for filament string inrush current control, and you want a PTC (Positive Temperature Coefficient) type for the degausser. Digi-Key ( www.digikey.com ) has these units under NTC Thermistors and PTC Thermistors. I don't know if Globar is still around, but a lot of companies make them. Bacon, WA3WDR - Original Message - From: gwt [EMAIL PROTECTED] To: [EMAIL PROTECTED]; Discussion of AM Radio amradio@mailman.qth.net Sent: Thursday, May 26, 2005 5:09 PM Subject: Re: [AMRadio] Globar brand thermistors Yea, when Jim reminded me of those globars, I realized that would be perfect to slow down the current surge on my my old radio with the 117Z6 rectifier, that lights up like a light bulb when you first turn it on! That's gotta shorten the life of the tube, big time! In my mind's eye, I could see one of those globars, still in the card, someplace in all my old TV krap that I never threw away. The question is - can I find it? So I headed out to my storage area, rumaged around, found my old tube caddy, and found the globar, still in it's wrapping, just like I saw it in my mind's eye. Way Kool! 73, George KE4HJ
Re: [AMRadio] 117Z6GT question
John the thing about the remark is that it resembles many of us. Good to know I offended many, not just one or two. George glad you found those. Now don't tell anyone, they might want some too. 73 Jim W5JO By The Way: I resemble, I mean resent, that remark about the gray hair and unsteady walk. John, WA5BXO __ 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] Globar brand thermistors
Yes, the Scott slrm I have has a few of them in the AC line I think, and that receiver starts up nice. God help me if I had to replace one of them... Brett N2DTS -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of gwt Sent: Thursday, May 26, 2005 5:09 PM To: [EMAIL PROTECTED]; Discussion of AM Radio Subject: Re: [AMRadio] Globar brand thermistors Yea, when Jim reminded me of those globars, I realized that would be perfect to slow down the current surge on my old radio with the 117Z6 rectifier, that lights up like a light bulb when you first turn it on! That's gotta shorten the life of the tube, big time! In my mind's eye, I could see one of those globars, still in the card, someplace in all my old TV krap that I never threw away. The question is - can I find it? So I headed out to my storage area, rumaged around, found my old tube caddy, and found the globar, still in it's wrapping, just like I saw it in my mind's eye. Way Kool! 73, George KE4HJ John Coleman wrote: Those things are really pretty cool. I think they are around 100 ohms cold and about 1 ohm hot at up to 3 amps. They are great for the primary of filament XFMRs for Xmitting tubes. I used to use them all the time. We kept them in stock for the degaussing circuits in TV repair but I haven't seen them for a long time. John Coleman, WA5BXO -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Jim Wilhite Sent: Thursday, May 26, 2005 1:41 PM To: Discussion of AM Radio Subject: Re: [AMRadio] 117Z6GT question George: You might search around for some old Globar resistors. Install on the input line and they will absorb some of that inrush resulting in longer life for the tubes. I found a card of them (they were in little packets that one pulled off like the pull tabs you bought at the beer joint) in little bags. They were used in TV sets and AC/DC radios. Check for a parts store that has been in business for a long time and find the guy with gray hair and an unsteady walk. He will know what you are talking about. 73 Jim W5JO __ 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] Globar brand thermistors
Thanks for the info, Bob. George KE4HJ Bob Bruhns wrote: One thing about those Globar units - the type you want for the filament string is not the same as the type you want for the degausser. You want an NTC (negative temperature coefficient) type for filament string inrush current control, and you want a PTC (Positive Temperature Coefficient) type for the degausser. Digi-Key ( www.digikey.com ) has these units under NTC Thermistors and PTC Thermistors. I don't know if Globar is still around, but a lot of companies make them. Bacon, WA3WDR - Original Message - From: gwt [EMAIL PROTECTED] To: [EMAIL PROTECTED]; Discussion of AM Radio amradio@mailman.qth.net Sent: Thursday, May 26, 2005 5:09 PM Subject: Re: [AMRadio] Globar brand thermistors Yea, when Jim reminded me of those globars, I realized that would be perfect to slow down the current surge on my my old radio with the 117Z6 rectifier, that lights up like a light bulb when you first turn it on! That's gotta shorten the life of the tube, big time! In my mind's eye, I could see one of those globars, still in the card, someplace in all my old TV krap that I never threw away. The question is - can I find it? So I headed out to my storage area, rumaged around, found my old tube caddy, and found the globar, still in it's wrapping, just like I saw it in my mind's eye. Way Kool! 73, George KE4HJ __ 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] 117Z6GT question
Hi Jim, I only found one - hoping for more, but my NOS ran out with the one! George KE4HJ Jim Wilhite wrote: John the thing about the remark is that it resembles many of us. Good to know I offended many, not just one or two. George glad you found those. Now don't tell anyone, they might want some too. 73 Jim W5JO By The Way: I resemble, I mean resent, that remark about the gray hair and unsteady walk. John, WA5BXO __ 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
