Re: [Elecraft] 12 v power source for Elecraft Transceivers
This disease was covered on QRZ a while ago, see attached. 73, and thanks, Dave (NK7Z) https://www.nk7z.net ARRL Volunteer Examiner ARRL Technical Specialist, RFI ARRL Asst. Director, NW Division, Technical Resources On 12/6/22 13:19, Michael Carter wrote: "Clearly case of stimulation of overactive ham hormone resisting disposal of anything looking potentially useful." Ed, your characterization of this personality quirk is the best explanation I've seen yet - I'll share it with my XYL, although I doubt it will temper her (un)enthusiasm for my collection of castoffs and electronic rescues! 73, Mike, K8CN __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to d...@nk7z.net__ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] 12 v power source for Elecraft Transceivers
"Clearly case of stimulation of overactive ham hormone resisting disposal of anything looking potentially useful." Ed, your characterization of this personality quirk is the best explanation I've seen yet - I'll share it with my XYL, although I doubt it will temper her (un)enthusiasm for my collection of castoffs and electronic rescues! 73, Mike, K8CN __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] 12 v power source for Elecraft Transceivers
On 2022-12-06 10:54, Edward Mccann wrote: Clearly case of stimulation of overactive ham hormone resisting disposal of anything looking potentially useful. *** That happened to me! I was working at a railroad electronics shop. It was around 1985. One day, the boss decided to clean house. Among the many goodies I rescued from the dumpster were * 4 Large 48VCT power transformers * A berry box of TO-3 PNP Darlington transistors * A giant heat sink, drilled for TO-3 transistors ...So I built a power supply. I bolted 5 of those Darlingtons to the monster heatsink, put them in parallel with emitter resistors, in the negative leg of the output of my bridge rectifier, which was bolted to a thick aluminum bottom plate. This allowed me to ground the collectors of the transistors and dispense with insulating washers. Using the input taps of the power transformer, I was able to adjust it for just the right head room. That supply did 20A with no fuss whatsoever. I think it was actually capable of 40A. This year, I dug it out of the junk, powered it up - and it still works! Not only that, it was 12.000V. Another use I found for this stuff - the flea market had yielded up a mint condition Galaxy V transceiver. But it had no power supply. I took apart one of those big 48V power transformers and rewound it, to make a supply for the V. - Jerry, KF6VB Thanks all! Ed McCann AG6CX On Dec 6, 2022, at 10:47 AM, Edward Mccann wrote: Tnx Jim. Label claims to be 12DC out, but clearly needs to be measured as investigation proceeds! Minimal specs, but autopsy underway. Ed McCann AG6CX On Dec 6, 2022, at 10:29 AM, Jim Brown wrote: On 12/6/2022 10:16 AM, Edward Mccann wrote: Slightly off topic, I will admit, but in reworking garden walkway low-voltage (12 v DC) I made surplus a 200 VA transformer. Is what you have a transformer (two windings on ferrous core, providing low voltage AC) or a power supply (transformer plus circuitry to provide DC output? 73, Jim K9YC __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to edwmcc...@gmail.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to je...@tr2.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] 12 v power source for Elecraft Transceivers
Mystery solved. AC out, label in error, autopsy reveals no inner circuitry! Boat anchor or garage sale. Clearly case of stimulation of overactive ham hormone resisting disposal of anything looking potentially useful. Thanks all! Ed McCann AG6CX > On Dec 6, 2022, at 10:47 AM, Edward Mccann wrote: > > Tnx Jim. > Label claims to be 12DC out, but clearly needs to be measured as > investigation proceeds! > Minimal specs, but autopsy underway. > > Ed McCann > AG6CX > > > >>> On Dec 6, 2022, at 10:29 AM, Jim Brown wrote: >>> >>> On 12/6/2022 10:16 AM, Edward Mccann wrote: >>> Slightly off topic, I will admit, but in reworking garden walkway >>> low-voltage (12 v DC) I made surplus a 200 VA transformer. >> >> Is what you have a transformer (two windings on ferrous core, providing low >> voltage AC) or a power supply (transformer plus circuitry to provide DC >> output? >> >> 73, Jim K9YC >> __ >> Elecraft mailing list >> Home: http://mailman.qth.net/mailman/listinfo/elecraft >> Help: http://mailman.qth.net/mmfaq.htm >> Post: mailto:Elecraft@mailman.qth.net >> >> This list hosted by: http://www.qsl.net >> Please help support this email list: http://www.qsl.net/donate.html >> Message delivered to edwmcc...@gmail.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] 12 v power source for Elecraft Transceivers
Tnx Jim. Label claims to be 12DC out, but clearly needs to be measured as investigation proceeds! Minimal specs, but autopsy underway. Ed McCann AG6CX > On Dec 6, 2022, at 10:29 AM, Jim Brown wrote: > > On 12/6/2022 10:16 AM, Edward Mccann wrote: >> Slightly off topic, I will admit, but in reworking garden walkway >> low-voltage (12 v DC) I made surplus a 200 VA transformer. > > Is what you have a transformer (two windings on ferrous core, providing low > voltage AC) or a power supply (transformer plus circuitry to provide DC > output? > > 73, Jim K9YC > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to edwmcc...@gmail.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] 12 v power source for Elecraft Transceivers
On 12/6/2022 10:16 AM, Edward Mccann wrote: Slightly off topic, I will admit, but in reworking garden walkway low-voltage (12 v DC) I made surplus a 200 VA transformer. Is what you have a transformer (two windings on ferrous core, providing low voltage AC) or a power supply (transformer plus circuitry to provide DC output? 73, Jim K9YC __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
[Elecraft] 12 v power source for Elecraft Transceivers
Slightly off topic, I will admit, but in reworking garden walkway low-voltage (12 v DC) I made surplus a 200 VA transformer. This may sound ridiculous, but have any readers had experience using such a transformer as DC power source for our 12v Elecraft transceivers? Certainly linear, but only binary controls (on or off), circuit breaker protected to AC Mains. (Yes, sun light detector removed to allow use day or night.) I know some have in the past suggested such devices as a source for insulated wire used in balun construction, but we have moved beyond that notion for a variety of reasons. Suggestions, besides boat anchor? Ed McCann AG6CX __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
