Re: [Elecraft] OT James Clerk Maxwell
Another very good book about Oliver Heavyside is Paul Nahin's Oliver Heaviside: Sage in Solitude: The Life, Work, and Times of an Electrical Genius in the Victorian Age: https://www.amazon.com/Oliver-Heaviside-Solitude-Electrical-Victorian/dp/0879422386 73 Pete - N8TR At 12:38 AM 3/26/2020, Kevin McQuiggin wrote: It is also of value to read about Professor Oliver Heaviside, a less-heralded but brilliant mathematician and physicist who was able to simplify Maxwellâs very complex electromagnetic theory of about 30 equations down to a much more understandable set of 4 or 6 equations. It is Heavisideâs re-interpretation and simplification of Maxwellâs original equations that are taught and used today. __ 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] KPA1500 Caution
That's odd. I got my shipping notice Friday (ordered first day 2.5 hours after email) and also a UPS tracking number which I have been using to track the amps progress. 73, Pete - N8TR At 06:17 PM 4/18/2018, alapa...@w2cs.net wrote: Iâm a day-2 KPA1500 patient waiter. I got the email 2 days ago and today it shipped. Thereâs one potential problem. It must have been mentioned on this reflector and I missed it. Elecraft used U.S. Postal Service (USPS) to send the amp cross-country. I have never had a good experience with USPSâ handling of package deliveries, particularly heavy (expensive) ones. If you care about the shipper, have the discussion with Elecraft up front. I should have. Good luck all. Gary W2CS __ 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] Art of Electronics
I have both the first and second editions of the book. The first came out in 1980; the second in 1989. The first edition had 716 pages; the second 1125. 73,Pete - N8TR At 01:42 PM 4/8/2018, donov...@starpower.net wrote: Hi Robie, The free Second Edition pdf is quite dated (1980), but work every penny of the price! 73 Frank W3LPL - __ 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] K3 Power Drop During Operation
I had a similar problem with one of my K3's (#4576) starting last November. Seemingly at random, output power dropped to around 35 watts. At low power settings (less than 12 watts) power was limited to 3.5 watts. Sometimes normal power output would be restored in a couple of hours, other times I had to turn the radio off for a day or two. In December I sent it back to Elecraft to find and fix the problem. It is still there so I don't know what the problem was. 73, Pete - N8TR At 10:07 AM 1/26/2018, you wrote: Thanks Bill. No broadcast stations within many miles, and no high-power AM transmitters at all on Curacao! No other transmitters here at PJ2T were active during my "power suck" event. 73, Jeff PJ2ND / K8ND __ 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] Balun Questions
At 01:07 AM 2/7/2016, K2AV wrote: I also came by bundles of miscellaneous 6 foot to 15 foot jumpers with various connectors on end for similar ridiculous low prices per foot. In the last few years I have found similar RG400 jumpers at the Dayton Hamvention at quite reasonable prices. Since I use RG400 exclusively for making chokes, short lengths are fine. 73, Pete - N8TR __ 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] OT- PL259
Clint, The ones I have used are made by Multicomp. I have only used the one for RG213. The center pin is soldered. Very useful when on top of a tower. They can be found here: http://www.mcmelectronics.com/product/MULTICOMP-MC17-01B-5-/27-7005 73 Pete - N8TR At 02:52 PM 11/4/2013, Clint wrote: Does anyone know the MFG and PN of a Clamp/Solder type PL259. This style clamps the shield with a nut and ferrule and has a silicone gasket to keep water out. The center can be crimped and/or soldered. Thanks, Clint KI6SSN __ 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 __ 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
Re: [Elecraft] odds and ends...
My experience is the same as Tim's. I have an M-Audio Audiophile 2496 PCI which is 96Khz card and I get a total bandwidth of 96Khz. With my 192Khz Infrasonic Quartet PCI I get a total of 192 Khz. I use the LP-PAN with NaP3. I assumed this satisfied Nyquist since both the I and Q channels were being digitized. 73 Pete - N8TR At 10:12 PM 8/19/2012, KQ8M wrote: Not really following this thread but I must have some really bad cards from creative, asus and m-audio as my 96KHz cards only get 96Khz total, 48KHz either side of center and my 192KHz cards only get 192KHz total, 96KHz either side of center using my K3, LP-Pan and PowerSDR. Or with any of my SDR receivers and CWSkimmer. Or with any SDR receivers I build and test with Rocky, HDSDR, WinSDR etc. I know of no known low cost sound card that will provide 384KHz of total audio bandwidth. 73, Tim Herrick, KQ8M Charter Member North Coast Contesters k...@kq8m.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
Re: [Elecraft] PTT Footswitch
I use a Treadlite switch model t-51-S made by the Linemaster Switch Corp. I have several that I have found at Flea markets and Ham Fests. However, for the reasons described below, I do not like foot switches so I use them as knee switches. I mount them vertically beneath my operating desks. The slightest movement of my knee or thigh activates them. In a long SSB contest I find them much less tiring. 73 Pete - N8TR At 09:54 AM 7/16/2012, Jim Miller KG0KP wrote: My problem with the footswitch is that I never liked the height of it making foot tired holding it up to try to keep it from scooting away. Solved by mounting it on a thin piece of paneling and then another piece of 3/4 inch board on top to raise my foot to a comfortable level compared to the switch. Also some of the foam shelf stuff for my foot area AND underside of the whole thing. NOW it sits still and my foot is comfortable. Just the thought of transmit gets the job done. No, it isn't cute, not painted or sanded and stained but it sure does the trick. 73, de Jim KG0KP __ 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
Re: [Elecraft] OCF antennas-Now way off Topic
Don, When I started work at NASA's Lewis Research Center in the early 60's we often went to seminars at Case. Local legend had it that in one of Dr Green's classes he presented a research problem that he himself was working on and told the class that anyone solving it would be awarded a master's degree along with his BS. Donald E Knuth (author of the famous The Art of Computer Programming series of books) was in the class and solved the problem ( and got his BS MS in 1960). Did that happen while you were there? I know that this is way off topic but I have always been curious if that actually occurred. 73 Pete - N8TR At 08:40 PM 3/10/2012, Don Wilhelm wrote: And I went to CIT (Case Institute of Technology) - way back when - which was back in the '60s a rival for MIT in the forefront of engineering cutting edge technology. After suffering through Geunter's Green Book which was an attempt of an author promoting and refining his book advancing his math theories surrounding set theory, I think I got a decent math foundation. __ 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
Re: [Elecraft] K3 band stacking suggestion
What has worked well for me is a scheme posted here several years ago by ???: 1 - 10 meters 2 - 20 meters 3 - 30 meters 4 - 40 meters 5 - 15 meters 6 - 160 meters 7 - 17 meters 8 - 80 meters 9 - 12 meters (no relation to 12 meters, just what was left) 73 Pete - N8TR At 08:23 AM 10/31/2011, Barry wrote: I also have sored each band in the quick memories, 1-9. The only problem I have with those is recalling which one is which. Any tips on that? Barry W2UP __ 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
Re: [Elecraft] OT Quality UHF Connectors
I believe the Mouser description is incorrect. The Amphenol UHF catalog at: http://www.amphenolrf.com/products/CatalogPages/UHF.pdf clearly shows the 83-1SP as having silver body plating while the plating on the 83-1SP-1050 is nickel. That said, I have never had any trouble soldering to the 83-1SP-1050. I tin the braid then use an American Beauty 100 or 200 watt iron. It is important that the tip have enough thermal mass. Even a Weller 550 soldering gun does not have a large enough tip. 73 Pete - N8TR At 10:07 AM 10/12/2011, you wrote: I looked at the specs for Amphenol 83-1SP connectors on Mouser and the center pin is silver plated but the shell plating is nickel. What is the Amphenol part number for PL-259's with silver plated shells ? Bob K6UJ __ 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
Re: [Elecraft] W6BK's #1 effort in working VP8ORK: 18 of 21 band/slots (Elecraft K3 both ways)
At 03:25 PM 2/9/2011, Brian Alsop wrote: The listings show the max # band slots for USA stations to be at 20. N4NN,N4BAA,K3ZXL,W6XA,K4XP,K4WZ,AB1V,and N3XX are at 20 for zone 5. K5RK,W5UN,W5IZ,K8LEE,K5AR,AG9S,N8TR,N0XA,KN50,W4NL are at 20 for zone 4. I used one of my two K3's for all 20 of my QSO's. The APF helped on several CW contacts. 73 Pete - N8TR __ 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
[Elecraft] K3 s/n 638 Arrival
My K3/100 kit s/n 638 arrived in NE Ohio this afternoon ( April14). It came with the KXV3 and both 200 Hz and 500 Hz roofing filters. The 1.8 kHz roofing filter and KRX3 were backordered. I ordered the radio on September 14, 2007. My notice of shipping in 2-3 weeks arrived on March 18 (Katiegram). I received the UPS tracking number on April 7. A day or so later Madelyn sent an email telling me it was shipped on April 7. 73 Pete - N8TR ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
