Re: [AMRadio] transformer rattle - kill or cure?
Max: While its out, it would not hurt a thing to give it several dips. Regards, TRS Gary...WZ1M - Original Message - From: "AirRadio" To: "Discussion of AM Radio in the Amateur Service" Sent: Wednesday, December 23, 2009 1:54 PM Subject: Re: [AMRadio] transformer rattle - kill or cure? > Gary, > Just gone through a massive lightening storm here a moment ago so > everything > was off for a while, yes the caps are Ok, I have actually swapped out the > transformer and tried it under a light load, exactly the same, I will be > 'hot dipping' this evening see how it is tomorrow, fingers crossed > here > goes. > 73 Max M0GHQ/KJ4ISS > > > - Original Message - > From: "Gary" > To: "Discussion of AM Radio in the Amateur Service" > > Sent: Wednesday, December 23, 2009 6:48 PM > Subject: Re: [AMRadio] transformer rattle - kill or cure? > > >> You say, "latest boatanchor", which mite mean that the transformer is >> becoming saturated to much from an over load condition. This would cause >> a >> rattle. I have read the other posts and the preheat and a COUPLE of dips >> in >> varnish would more than likely, cure your problem. Check out those filter >> caps. >> Regards, >> Gary...WZ1M >> ----- Original Message - >> From: "AirRadio" >> To: "Discussion of AM Radio in the Amateur Service" >> >> Sent: Wednesday, December 23, 2009 10:39 AM >> Subject: [AMRadio] transformer rattle - kill or cure? >> >> >>>I have a mains transformer in my latest boatanchor, it is rattling like >>>mad, eventually goes away after an hour or so, I thought about dropping >>>it >>>in a can of varnish, anyone cured one before, any luck or waste of time? >>> 73 Max >>> >>> -- >>> I am using the free version of SPAMfighter. >>> We are a community of 6 million users fighting spam. >>> SPAMfighter has removed 2223 of my spam emails to date. >>> Get the free SPAMfighter here: http://www.spamfighter.com/len >>> >>> The Professional version does not have this message >>> __ >>> Our Main Website: http://www.amfone.net >>> AMRadio mailing list >>> Searchable Archives: >>> http://www.mail-archive.com/amradio@mailman.qth.net/ >>> List Rules (must read!): http://w5ami.net/amradiofaq.html >>> List Home: http://mailman.qth.net/mailman/listinfo/amradio >>> Post: AMRadio@mailman.qth.net >>> To unsubscribe, send an email to amradio-requ...@mailman.qth.net with >>> the word unsubscribe in the message body. >>> >>> This list hosted by: http://www.qsl.net >>> Please help support this email list: http://www.qsl.net/donate.html >>> >> >> >> __ >> Our Main Website: http://www.amfone.net >> AMRadio mailing list >> Searchable Archives: http://www.mail-archive.com/amradio@mailman.qth.net/ >> List Rules (must read!): http://w5ami.net/amradiofaq.html >> List Home: http://mailman.qth.net/mailman/listinfo/amradio >> Post: AMRadio@mailman.qth.net >> To unsubscribe, send an email to amradio-requ...@mailman.qth.net with >> the word unsubscribe in the message body. >> >> This list hosted by: http://www.qsl.net >> Please help support this email list: http://www.qsl.net/donate.html > > > > > > > No virus found in this incoming message. > Checked by AVG - www.avg.com > Version: 9.0.722 / Virus Database: 270.14.117/2582 - Release Date: > 12/22/09 > 18:22:00 > > > -- > I am using the free version of SPAMfighter. > We are a community of 6 million users fighting spam. > SPAMfighter has removed 2223 of my spam emails to date. > Get the free SPAMfighter here: http://www.spamfighter.com/len > > The Professional version does not have this message > > > __ > Our Main Website: http://www.amfone.net > AMRadio mailing list > Searchable Archives: http://www.mail-archive.com/amradio@mailman.qth.net/ > List Rules (must read!): http://w5ami.net/amradiofaq.html > List Home: http://mailman.qth.net/mailman/listinfo/amradio > Post: AMRadio@mailman.qth.net > To unsubscribe, send an email to amradio-requ...@mailman.qth.net with > the word unsubscribe in the message body. > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > __ Our Main Website: http://www.amfone.net AMRadio mailing list Searchable Archives: http://www.mail-archive.com/amradio@mailman.qth.net/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Post: AMRadio@mailman.qth.net To unsubscribe, send an email to amradio-requ...@mailman.qth.net with the word unsubscribe in the message body. This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [AMRadio] transformer rattle - kill or cure?
Gary, Just gone through a massive lightening storm here a moment ago so everything was off for a while, yes the caps are Ok, I have actually swapped out the transformer and tried it under a light load, exactly the same, I will be 'hot dipping' this evening see how it is tomorrow, fingers crossed here goes. 73 Max M0GHQ/KJ4ISS - Original Message - From: "Gary" To: "Discussion of AM Radio in the Amateur Service" Sent: Wednesday, December 23, 2009 6:48 PM Subject: Re: [AMRadio] transformer rattle - kill or cure? > You say, "latest boatanchor", which mite mean that the transformer is > becoming saturated to much from an over load condition. This would cause a > rattle. I have read the other posts and the preheat and a COUPLE of dips > in > varnish would more than likely, cure your problem. Check out those filter > caps. > Regards, > Gary...WZ1M > - Original Message - > From: "AirRadio" > To: "Discussion of AM Radio in the Amateur Service" > > Sent: Wednesday, December 23, 2009 10:39 AM > Subject: [AMRadio] transformer rattle - kill or cure? > > >>I have a mains transformer in my latest boatanchor, it is rattling like >>mad, eventually goes away after an hour or so, I thought about dropping it >>in a can of varnish, anyone cured one before, any luck or waste of time? >> 73 Max >> >> -- >> I am using the free version of SPAMfighter. >> We are a community of 6 million users fighting spam. >> SPAMfighter has removed 2223 of my spam emails to date. >> Get the free SPAMfighter here: http://www.spamfighter.com/len >> >> The Professional version does not have this message >> __ >> Our Main Website: http://www.amfone.net >> AMRadio mailing list >> Searchable Archives: http://www.mail-archive.com/amradio@mailman.qth.net/ >> List Rules (must read!): http://w5ami.net/amradiofaq.html >> List Home: http://mailman.qth.net/mailman/listinfo/amradio >> Post: AMRadio@mailman.qth.net >> To unsubscribe, send an email to amradio-requ...@mailman.qth.net with >> the word unsubscribe in the message body. >> >> This list hosted by: http://www.qsl.net >> Please help support this email list: http://www.qsl.net/donate.html >> > > > __ > Our Main Website: http://www.amfone.net > AMRadio mailing list > Searchable Archives: http://www.mail-archive.com/amradio@mailman.qth.net/ > List Rules (must read!): http://w5ami.net/amradiofaq.html > List Home: http://mailman.qth.net/mailman/listinfo/amradio > Post: AMRadio@mailman.qth.net > To unsubscribe, send an email to amradio-requ...@mailman.qth.net with > the word unsubscribe in the message body. > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html No virus found in this incoming message. Checked by AVG - www.avg.com Version: 9.0.722 / Virus Database: 270.14.117/2582 - Release Date: 12/22/09 18:22:00 -- I am using the free version of SPAMfighter. We are a community of 6 million users fighting spam. SPAMfighter has removed 2223 of my spam emails to date. Get the free SPAMfighter here: http://www.spamfighter.com/len The Professional version does not have this message __ Our Main Website: http://www.amfone.net AMRadio mailing list Searchable Archives: http://www.mail-archive.com/amradio@mailman.qth.net/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Post: AMRadio@mailman.qth.net To unsubscribe, send an email to amradio-requ...@mailman.qth.net with the word unsubscribe in the message body. This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [AMRadio] transformer rattle - kill or cure?
You say, "latest boatanchor", which mite mean that the transformer is becoming saturated to much from an over load condition. This would cause a rattle. I have read the other posts and the preheat and a COUPLE of dips in varnish would more than likely, cure your problem. Check out those filter caps. Regards, Gary...WZ1M - Original Message - From: "AirRadio" To: "Discussion of AM Radio in the Amateur Service" Sent: Wednesday, December 23, 2009 10:39 AM Subject: [AMRadio] transformer rattle - kill or cure? >I have a mains transformer in my latest boatanchor, it is rattling like >mad, eventually goes away after an hour or so, I thought about dropping it >in a can of varnish, anyone cured one before, any luck or waste of time? > 73 Max > > -- > I am using the free version of SPAMfighter. > We are a community of 6 million users fighting spam. > SPAMfighter has removed 2223 of my spam emails to date. > Get the free SPAMfighter here: http://www.spamfighter.com/len > > The Professional version does not have this message > __ > Our Main Website: http://www.amfone.net > AMRadio mailing list > Searchable Archives: http://www.mail-archive.com/amradio@mailman.qth.net/ > List Rules (must read!): http://w5ami.net/amradiofaq.html > List Home: http://mailman.qth.net/mailman/listinfo/amradio > Post: AMRadio@mailman.qth.net > To unsubscribe, send an email to amradio-requ...@mailman.qth.net with > the word unsubscribe in the message body. > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > __ Our Main Website: http://www.amfone.net AMRadio mailing list Searchable Archives: http://www.mail-archive.com/amradio@mailman.qth.net/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Post: AMRadio@mailman.qth.net To unsubscribe, send an email to amradio-requ...@mailman.qth.net with the word unsubscribe in the message body. This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [AMRadio] transformer rattle - kill or cure?
Hi, I used to rebuild motors and transformers and the older ones never seemed to keep the laminations tight or bonded. We used to take older ones and put them in an oven for a couple of hours at 150 or so degrees. Then put them submerged in a tank of thinned varnish for about 10 minutes. Pull them out and wipe off the excess varnish and cool overnight. Heating the core seems to invite the thinned varnish to penetrate deeper into the laminations. This always kept the cores quiet. Its a little messy, but works. Good Luck. Mel, --- On Wed, 12/23/09, rbethman wrote: From: rbethman Subject: Re: [AMRadio] transformer rattle - kill or cure? To: "Discussion of AM Radio in the Amateur Service" Date: Wednesday, December 23, 2009, 9:23 AM Max - Is this your BC-610E? If it is, I believe they use open frame transformers. They are also difficult to get to. In that instance, I'd try to look at the "wedges" between the bobbin and the laminations. Try to tighten them a hair. Bob - N0DGN >> On Wed, Dec 23, 2009 at 10:39 AM, AirRadio >> wrote: >> >>> I have a mains transformer in my latest boatanchor, it is rattling >>> like mad, eventually goes away after an hour or so, I thought about >>> dropping it in a can of varnish, anyone cured one before, any luck or >>> waste of time? >>> __ Our Main Website: http://www.amfone.net AMRadio mailing list Searchable Archives: http://www.mail-archive.com/amradio@mailman.qth.net/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Post: AMRadio@mailman.qth.net To unsubscribe, send an email to amradio-requ...@mailman.qth.net with the word unsubscribe in the message body. This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Our Main Website: http://www.amfone.net AMRadio mailing list Searchable Archives: http://www.mail-archive.com/amradio@mailman.qth.net/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Post: AMRadio@mailman.qth.net To unsubscribe, send an email to amradio-requ...@mailman.qth.net with the word unsubscribe in the message body. This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [AMRadio] transformer rattle - kill or cure?
Bob, No this is in a Drake R-4c, that is why it is a tad irritating, if it was in the '610 it would probably not notice so much, also I have spares for all of them. I have removed it and am going to leave it in a pot of varnish overnight, better not put it in the oven the Turkey might taste a bit odd on the 25th ;-) it will either make no difference or will sort it, all the laminations look tight and it is already varnished maybe there is a small looseness somewhere however the bobbin looks tight enough. it is 30 years old though maybe something has moved over time. 73 Max M0GHQ/KJ4ISS - Original Message - From: "rbethman" To: "Discussion of AM Radio in the Amateur Service" Sent: Wednesday, December 23, 2009 5:23 PM Subject: Re: [AMRadio] transformer rattle - kill or cure? > Max - Is this your BC-610E? > > If it is, I believe they use open frame transformers. They are also > difficult to get to. > > In that instance, I'd try to look at the "wedges" between the bobbin and > the laminations. Try to tighten them a hair. > > Bob - N0DGN > > >>> On Wed, Dec 23, 2009 at 10:39 AM, AirRadio >>> wrote: >>> >>>> I have a mains transformer in my latest boatanchor, it is rattling >>>> like mad, eventually goes away after an hour or so, I thought about >>>> dropping it in a can of varnish, anyone cured one before, any luck or >>>> waste of time? >>>> > > __ > Our Main Website: http://www.amfone.net > AMRadio mailing list > Searchable Archives: http://www.mail-archive.com/amradio@mailman.qth.net/ > List Rules (must read!): http://w5ami.net/amradiofaq.html > List Home: http://mailman.qth.net/mailman/listinfo/amradio > Post: AMRadio@mailman.qth.net > To unsubscribe, send an email to amradio-requ...@mailman.qth.net with > the word unsubscribe in the message body. > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html No virus found in this incoming message. Checked by AVG - www.avg.com Version: 9.0.722 / Virus Database: 270.14.117/2582 - Release Date: 12/22/09 18:22:00 -- I am using the free version of SPAMfighter. We are a community of 6 million users fighting spam. SPAMfighter has removed 2223 of my spam emails to date. Get the free SPAMfighter here: http://www.spamfighter.com/len The Professional version does not have this message __ Our Main Website: http://www.amfone.net AMRadio mailing list Searchable Archives: http://www.mail-archive.com/amradio@mailman.qth.net/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Post: AMRadio@mailman.qth.net To unsubscribe, send an email to amradio-requ...@mailman.qth.net with the word unsubscribe in the message body. This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [AMRadio] transformer rattle - kill or cure?
Max - Is this your BC-610E? If it is, I believe they use open frame transformers. They are also difficult to get to. In that instance, I'd try to look at the "wedges" between the bobbin and the laminations. Try to tighten them a hair. Bob - N0DGN >> On Wed, Dec 23, 2009 at 10:39 AM, AirRadio >> wrote: >> >>> I have a mains transformer in my latest boatanchor, it is rattling >>> like mad, eventually goes away after an hour or so, I thought about >>> dropping it in a can of varnish, anyone cured one before, any luck or >>> waste of time? >>> __ Our Main Website: http://www.amfone.net AMRadio mailing list Searchable Archives: http://www.mail-archive.com/amradio@mailman.qth.net/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Post: AMRadio@mailman.qth.net To unsubscribe, send an email to amradio-requ...@mailman.qth.net with the word unsubscribe in the message body. This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [AMRadio] transformer rattle - kill or cure?
Forgot to mention, if you do set the transformer on rubber feet be sure to electrically ground the frame to the chassis to maintain the integrity of the safety ground just in case of a winding fault. Stevan A. White wrote: > As a broadcast engineer I have seen (or heard) transformers rattle as > you've described. My suggestion would be to let it be, especially if it > stops after a while. It sounds to me like it rattles when it's cold and > stops after it warms up. Does the noise gradually subside or just quit > abruptly? It is annoying to listen to the laminations rattle but it > would be even more annoying to try to "fix" one problem and create > another. Some transformer windings are spaced apart and spacers may > loosen some when they're cool and "tighten up" after they warm up. I > used to have one that did that and it really bothered me until I talked > to the factory guy and he explained what was happening. Even worse than > transformer laminations rattling is hearing a bank of SCRs grunting and > groaning. (I'll bet some on this list even know which line of > transmitters I'm talking about.) Happy Holidays to all! > > Steve White, W5SAW > __ Our Main Website: http://www.amfone.net AMRadio mailing list Searchable Archives: http://www.mail-archive.com/amradio@mailman.qth.net/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Post: AMRadio@mailman.qth.net To unsubscribe, send an email to amradio-requ...@mailman.qth.net with the word unsubscribe in the message body. This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [AMRadio] transformer rattle - kill or cure?
You might remove one of the end bells and try inserting something between the bobbin and the laminations at the end. Maybe that is a mite loose. Jim/W5JO > On Wed, Dec 23, 2009 at 10:39 AM, AirRadio > wrote: >> I have a mains transformer in my latest boatanchor, it is rattling >> like mad, eventually goes away after an hour or so, I thought about >> dropping it in a can of varnish, anyone cured one before, any luck or >> waste of time? > > Sounds like it abates once things settle in thermally.The simple > approach I'd try first Max is to check the tension on any securing > bolts through the transformer laminations or chassis. Sometimes that > takes care of it. Other methods include removing the transformer and > re-sealing the laminations it in hot varnish, or isolating the > transformer from the chassis on rubber bushings. The latter is not a > good idea IMO due to safety concerns with internal shorts which would > otherwise become apparent when the case is grounded to the chassis. > > Gary WZ1M is a member of this list and has a transformer rebuilding > business, so he can certainly provide you with some pointers. I think > Don K4KYV and a few others have successfully dealt with similar > problems with success. It might be as simple as tossing he transformer > in the oven for a while on its own if tightening the bolts doesn't > cure it. > > ~ Todd, KA1KAQ/4 > Please help support this email list: http://www.qsl.net/donate.html > __ Our Main Website: http://www.amfone.net AMRadio mailing list Searchable Archives: http://www.mail-archive.com/amradio@mailman.qth.net/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Post: AMRadio@mailman.qth.net To unsubscribe, send an email to amradio-requ...@mailman.qth.net with the word unsubscribe in the message body. This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [AMRadio] transformer rattle - kill or cure?
As a broadcast engineer I have seen (or heard) transformers rattle as you've described. My suggestion would be to let it be, especially if it stops after a while. It sounds to me like it rattles when it's cold and stops after it warms up. Does the noise gradually subside or just quit abruptly? It is annoying to listen to the laminations rattle but it would be even more annoying to try to "fix" one problem and create another. Some transformer windings are spaced apart and spacers may loosen some when they're cool and "tighten up" after they warm up. I used to have one that did that and it really bothered me until I talked to the factory guy and he explained what was happening. Even worse than transformer laminations rattling is hearing a bank of SCRs grunting and groaning. (I'll bet some on this list even know which line of transmitters I'm talking about.) Happy Holidays to all! Steve White, W5SAW Todd, KA1KAQ wrote: > On Wed, Dec 23, 2009 at 10:39 AM, AirRadio wrote: > >> I have a mains transformer in my latest boatanchor, it is rattling like mad, >> eventually goes away after an hour or so, I thought about dropping it in a >> can of varnish, anyone cured one before, any luck or waste of time? >> > > Sounds like it abates once things settle in thermally.The simple > approach I'd try first Max is to check the tension on any securing > bolts through the transformer laminations or chassis. Sometimes that > takes care of it. Other methods include removing the transformer and > re-sealing the laminations it in hot varnish, or isolating the > transformer from the chassis on rubber bushings. The latter is not a > good idea IMO due to safety concerns with internal shorts which would > otherwise become apparent when the case is grounded to the chassis. > > Gary WZ1M is a member of this list and has a transformer rebuilding > business, so he can certainly provide you with some pointers. I think > Don K4KYV and a few others have successfully dealt with similar > problems with success. It might be as simple as tossing he transformer > in the oven for a while on its own if tightening the bolts doesn't > cure it. > > ~ Todd, KA1KAQ/4 > __ > Our Main Website: http://www.amfone.net > AMRadio mailing list > Searchable Archives: http://www.mail-archive.com/amradio@mailman.qth.net/ > List Rules (must read!): http://w5ami.net/amradiofaq.html > List Home: http://mailman.qth.net/mailman/listinfo/amradio > Post: AMRadio@mailman.qth.net > To unsubscribe, send an email to amradio-requ...@mailman.qth.net with > the word unsubscribe in the message body. > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > > __ Our Main Website: http://www.amfone.net AMRadio mailing list Searchable Archives: http://www.mail-archive.com/amradio@mailman.qth.net/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Post: AMRadio@mailman.qth.net To unsubscribe, send an email to amradio-requ...@mailman.qth.net with the word unsubscribe in the message body. This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [AMRadio] transformer rattle - kill or cure?
On Wed, Dec 23, 2009 at 10:39 AM, AirRadio wrote: > I have a mains transformer in my latest boatanchor, it is rattling like mad, > eventually goes away after an hour or so, I thought about dropping it in a > can of varnish, anyone cured one before, any luck or waste of time? Sounds like it abates once things settle in thermally.The simple approach I'd try first Max is to check the tension on any securing bolts through the transformer laminations or chassis. Sometimes that takes care of it. Other methods include removing the transformer and re-sealing the laminations it in hot varnish, or isolating the transformer from the chassis on rubber bushings. The latter is not a good idea IMO due to safety concerns with internal shorts which would otherwise become apparent when the case is grounded to the chassis. Gary WZ1M is a member of this list and has a transformer rebuilding business, so he can certainly provide you with some pointers. I think Don K4KYV and a few others have successfully dealt with similar problems with success. It might be as simple as tossing he transformer in the oven for a while on its own if tightening the bolts doesn't cure it. ~ Todd, KA1KAQ/4 __ Our Main Website: http://www.amfone.net AMRadio mailing list Searchable Archives: http://www.mail-archive.com/amradio@mailman.qth.net/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Post: AMRadio@mailman.qth.net To unsubscribe, send an email to amradio-requ...@mailman.qth.net with the word unsubscribe in the message body. This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[AMRadio] transformer rattle - kill or cure?
I have a mains transformer in my latest boatanchor, it is rattling like mad, eventually goes away after an hour or so, I thought about dropping it in a can of varnish, anyone cured one before, any luck or waste of time? 73 Max -- I am using the free version of SPAMfighter. We are a community of 6 million users fighting spam. SPAMfighter has removed 2223 of my spam emails to date. Get the free SPAMfighter here: http://www.spamfighter.com/len The Professional version does not have this message __ Our Main Website: http://www.amfone.net AMRadio mailing list Searchable Archives: http://www.mail-archive.com/amradio@mailman.qth.net/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Post: AMRadio@mailman.qth.net To unsubscribe, send an email to amradio-requ...@mailman.qth.net with the word unsubscribe in the message body. This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
