[AMRadio] Electronics sale - Saturday - CNJ
please email direct for more info. damn spam filters :-| Thank You, Rev. Robert P. Chrysafis Universal Life Ministries http://www.ulc.org Moderator Hunterdonfree http://groups.yahoo.com/group/hunterdonfree Moderator NeighborhoodInformer NJ/PA http://groups.yahoo.com/group/NeighborhoodInformerNewJersey http://groups.yahoo.com/group/NeighborhoodInformerpennsylvania __ Our Main Website: http://www.amfone.net AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body.
[AMRadio] HV - low current rectifiers
I have a small box of HV low current rectifiers for TV service. 1V2's 1X2's 1B3's 3A3's 2X2's etc also some HV regulator triodes (the highest gain tube in the TV) 6BK4's Does anyone have a use for these? I was thinking of an over-modulation detection circuit for big rigs. Not enough current capability to actually provide a load but would be good for detection and trigger for something else maybe. These heaters can be lit up with a turn or two around the core of about any open frame power or filament XFMR. At any rate I have some if you want them holler. I am going through my stuff and find I have a lot of old TV tubes so if anyone is in need of one please holler. I do have some sweep tubes left but not a lot except in things like 34 volts and 42 volt etc, which few folks want. At any rate check with me before buying as I will be getting rid of a lot of this soon. John, WA5BXO __ Our Main Website: http://www.amfone.net AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body.
RE: [AMRadio] Panasonic microwave oven parts for radio
About switching power supplies: I have found that computer power supplies are pretty cool as well. I buy two identical supplies and remove the transformer out of one of them. Then I manufacture some sort of mount such as another pc board for the second XFMR. I connect the low voltage winding all in parallel with the transformer in the supply and get about 160V PTP form the HV side of the second XFMR with great isolation. The 160V PTP can be put in to single diode, bridge, doubler, tripler or quadrupler rectifier circuit to get up to 600VDC output at .5 amp or more depending on the supplies capability. It may require some small amount or dummy load on the 5 and / or 12 volt original outputs. The rectifier diodes that you use will need to be fast recovery type in order to handle the high speed switching. I have found them to be great for audio preamp supplies as well. Getting rid of the 60HZ power XFMR gets rid of a lot of 60HZ loop current in the chassis and cabling but does require some extra filtering and bypassing to get rid of the high frequency ripple and harmonic radiation. John, WA5BXO -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Rick Brashear Sent: Wednesday, October 10, 2007 10:54 AM To: [EMAIL PROTECTED]; 'Discussion of AM Radio in the Amateur Service' Subject: RE: [AMRadio] Panasonic microwave oven parts for radio Thanks John. Great info. Rick/K5IAR The light Panasonic ovens that say something like Inverter on the logo are switchers. No heavy transformer anymore. They provide negative polarity hot and operate in a current limit mode, not voltage regulation. There is a website on them, if you search for it, that talks about dissection of one, and the test results. They are pretty neat power supplies, providing like 1/2 amp of DC at >2kV. But very dangerous to play around with, unless you isolate, isolate, isolate. If you do decide to pass on the power supply, I would love to have one to play around with sometime. Might eventually be reconfigured to make a nice tube power supply. John K5PRO __ Our Main Website: http://www.amfone.net AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body.
Re: [AMRadio] Panasonic microwave oven parts for radio
I found this link for a 2700v 1a supply using microwave transformers. http://web.archive.org/web/20030627162157/http://www.vaxxine.com/phil/QEX_HV_Power_Supply.pdf http://tinyurl.com/yoa7cb use the short link if this doesn't post properly. Mike WE0H John Lyles wrote: The light Panasonic ovens that say something like Inverter on the logo are switchers. No heavy transformer anymore. They provide negative polarity hot and operate in a current limit mode, not voltage regulation. There is a website on them, if you search for it, that talks about dissection of one, and the test results. They are pretty neat power supplies, providing like 1/2 amp of DC at >2kV. But very dangerous to play around with, unless you isolate, isolate, isolate. If you do decide to pass on the power supply, I would love to have one to play around with sometime. Might eventually be reconfigured to make a nice tube power supply. John K5PRO __ Our Main Website: http://www.amfone.net AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body.
RE: [AMRadio] Panasonic microwave oven parts for radio
Thanks John. Great info. Rick/K5IAR The light Panasonic ovens that say something like Inverter on the logo are switchers. No heavy transformer anymore. They provide negative polarity hot and operate in a current limit mode, not voltage regulation. There is a website on them, if you search for it, that talks about dissection of one, and the test results. They are pretty neat power supplies, providing like 1/2 amp of DC at >2kV. But very dangerous to play around with, unless you isolate, isolate, isolate. If you do decide to pass on the power supply, I would love to have one to play around with sometime. Might eventually be reconfigured to make a nice tube power supply. John K5PRO __ Our Main Website: http://www.amfone.net AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body.
Re: [AMRadio] Panasonic microwave oven parts for radio
That's interesting to hear on the switcher HV supplies. Definitely useful at 1/2a. If it is noisy a guy could filter it more and have a nice compact HV supply. Now I have to go find one...hi hi... Just think of the possibilities of a small HV switcher hidden under a chassis of a radio that has a bad original supply that a guy can't find a transformer or other parts to repair it. Leave the original non-working parts on top for the visual look but having the switching supply hidden under the chassis...A mix of new school and old school to get a boatanchor operation with. I'll try to find that site and post the link. Mike WE0H John Lyles wrote: The light Panasonic ovens that say something like Inverter on the logo are switchers. No heavy transformer anymore. They provide negative polarity hot and operate in a current limit mode, not voltage regulation. There is a website on them, if you search for it, that talks about dissection of one, and the test results. They are pretty neat power supplies, providing like 1/2 amp of DC at >2kV. But very dangerous to play around with, unless you isolate, isolate, isolate. If you do decide to pass on the power supply, I would love to have one to play around with sometime. Might eventually be reconfigured to make a nice tube power supply. John K5PRO __ Our Main Website: http://www.amfone.net AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body.
[AMRadio] Panasonic microwave oven parts for radio
The light Panasonic ovens that say something like Inverter on the logo are switchers. No heavy transformer anymore. They provide negative polarity hot and operate in a current limit mode, not voltage regulation. There is a website on them, if you search for it, that talks about dissection of one, and the test results. They are pretty neat power supplies, providing like 1/2 amp of DC at >2kV. But very dangerous to play around with, unless you isolate, isolate, isolate. If you do decide to pass on the power supply, I would love to have one to play around with sometime. Might eventually be reconfigured to make a nice tube power supply. John K5PRO - > Date: Tue, 9 Oct 2007 14:08:07 -0500 > From: "Rick Brashear" <[EMAIL PROTECTED]> > Subject: [AMRadio] Microwave > This is a tad off topic, but still has roots in radio. My microwave bit the > dust and before I haul it out front for the scavengers is there any part of > it that might be usable in our radio field? How about the diodes? I am > assuming it has some kind of transformer, but it couldn't be much since the > thing is not heavy at all. It's a big Panasonic oven, but the insides don't > look promising. Any suggestions? __ Our Main Website: http://www.amfone.net AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body.
[AMRadio] Re: IARU bandplan
[EMAIL PROTECTED] writes: >That's just not the best plan. IARU can do better. I urge you to tell that to the ARRL - they need the feedback! When I offered my views, Dave Sumner wrote back that I was wrong, the plan was not restrictive and limiting, and anyway it is voluntary. He implied that since it was voluntary I need not worry about it. But as you and I both pointed out, voluntary plans have a way of becoming very powerful, nearly to the point of regulation if the regulating body decides so. Here are some useful email addresses: [EMAIL PROTECTED], [EMAIL PROTECTED], [EMAIL PROTECTED], [EMAIL PROTECTED], [EMAIL PROTECTED], [EMAIL PROTECTED], [EMAIL PROTECTED] I also wrote to my ARRL Division representatives as shown at http://www.arrl.org/divisions/ Steve WD8DAS ** See what's new at http://www.aol.com __ Our Main Website: http://www.amfone.net AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body.
[AMRadio] Re: IARU bandplan
A number of folks who found the IARU bandplan OK, and support restrictive band plans, have written to me saying "the bands are so crowded we've got to do something!" I must disagree. I passively listen to the MF and HF bands at least ten hours a week, and actively operate about an additional ten hours, and I do not find the bands particularly crowded. And the interference issues that I do overhear are usually caused by one of two things: either deliberate jamming and harrassment, or a shift in propagation brings QSOs that were previously unheard to each other into conflict. It is rarely a matter of too many hams on the bands... Again, I feel it is vital that we err on the side of flexibility and less restrictions, rather than more and tighter controls that eliminate future choices. If we are to remain viable as an organized hobby we've got to be open to a wide variety of modes, both old and new. Steve WD8DAS ** See what's new at http://www.aol.com __ Our Main Website: http://www.amfone.net AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body.
[AMRadio] Radio fun at the Boatanchors Web Ring
Radio fun at the Boatanchors Web Ring Have you heard about this radio ring? You can find a load of interesting sites that you may not have run across before. Each web page has a link to others. You just look for the ANCHOR symbol and click on NEXT to see another site, OR you can start at the hub page and see the whole list. It's easy to join up your own web page to the Boatanchors Web Ring and you'll increase the publicity and traffic to your site. I think it's a lot of fun, and best of all it's free. 73 & see you there - Bry, AF4K http://d.webring.com/hub?ring=ba __ Our Main Website: http://www.amfone.net AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body.
