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Good Evening,
My sister asked me just yesterday when I expected snow up here. She lives in Vancouver, Washington very near the Columbia River approximately 20 miles away as the crow flies. I stated, "Late December". Well I was wrong. We got an inch of snow just this morning. It is still on the ground in the shady areas. Quite surprising since it was not even heating season a week ago. But living in the mountains does make a difference. It did put off the troupe of deer hunters populating the area. They've high tailed it to home. Twenty meters has been quite good each morning this week with only a little QSB on the path into Oklahoma City. Hopefully this will hold true tomorrow afternoon. The sun has been quiet so the band did not have much noise and it was carrying traffic from OK as well as from over the pole. I was hearing two contacts simultaneously but one had that 'watery' quality to it indicative of a polar path. I've also been hearing stations working from South America today. Let's see how we do tomorrow. Please join us: Sunday 2300z (Sunday 4pm PDT) 14050 kHz Visit our web site: http://ecn.visionseer.com/ for net details. Thank you Dan. 73, Kevin. KD5ONS -- No virus found in this outgoing message. Checked by AVG Anti-Virus. Version: 7.0.344 / Virus Database: 267.11.9/116 - Release Date: 9/30/2005 _______________________________________________ Elecraft mailing list Post to: [hidden email] 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 |
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Hi
I will pretty soon start to solder my K2 and wondering if an oscilloscope would be handy to have. What should I take in consideration choosing one: 50-100-200 MHz modell or is that relevant? Whast is must for rf- measurements? It's been now nearly 30 years since I've touched a scope. (Maritime institute - Sparks) 73's Ben OH7PS _______________________________________________ Elecraft mailing list Post to: [hidden email] 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 |
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Hello Ben!
You do NOT need an oscilloscope to build and align your K2! A digital multimeter is all you need, and one could get away with building a K2 without even that. Still, an oscilloscope is a wonderful tool to have around the shop. If I had to give up all my instruments save one, the one instrument I'd keep would be my oscilloscope. As you know an oscilloscope can do anything almost any other instrument can do and more besides. You're an O.T. like me. The new oscilloscopes are digital. They quantize analog signals and process streams of digital data. Like all digital systems, they have advantages and disadvantages based on how well the digitizing process replicates the analog signal being studied. Personally, I like an analog scope best. The frequency response should be at least 5 or 10 times the highest frequency signal you will observe, in order to see artifacts on the signal accurately. That means something in the range of 200 MHz for someone working on high-frequency equipment. Dual trace capability is also extremely handy for certain things. But I'd take a 200 MHz single trace scope over a 50 MHz or lower dual trace scope any day for sheer usefulness and value. I have a Hewlett-Packard 1740A scope that I picked up used. It's only a 100 MHz scope, but it's a rugged, reliable, analog dual trace scope. I suspect it'll be quite a while before it's retired from the central position on my bench. And if some 'sexy' digital-damsel gets added to the bench to do things the trusty 1740 can't, I suspect she'll have to share the workbench with the 1740 who will still be called upon when I want to see an analog signal without its being processed and replicated on a digitized display. Ron AC7AC -----Original Message----- From: [hidden email] [mailto:[hidden email]] On Behalf Of OH7PS Sent: Saturday, October 01, 2005 11:12 PM To: Elecraft Subject: [Elecraft] Oscilloscope Hi I will pretty soon start to solder my K2 and wondering if an oscilloscope would be handy to have. What should I take in consideration choosing one: 50-100-200 MHz modell or is that relevant? Whast is must for rf- measurements? It's been now nearly 30 years since I've touched a scope. (Maritime institute - Sparks) 73's Ben OH7PS _______________________________________________ Elecraft mailing list Post to: [hidden email] 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 _______________________________________________ Elecraft mailing list Post to: [hidden email] 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 |
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In reply to this post by OH7PS
Ben,
I have one, a used100 MHz portable Tektronix. I didn't use it or need it on the K2 at all, but needed it when I was setting up my SDR-1000. A TeK 475 is a good scope. I used one at work, and they are available for a reasonable price. 73, Chas At 02:12 AM 10/2/2005, OH7PS wrote: >Hi > >I will pretty soon start to solder my K2 and wondering if an >oscilloscope would be handy to have. > >What should I take in consideration choosing one: 50-100-200 MHz >modell or is that relevant? >Whast is must for rf- measurements? > >It's been now nearly 30 years since I've touched a scope. (Maritime >institute - Sparks) > >73's Ben >OH7PS >_______________________________________________ >Elecraft mailing list >Post to: [hidden email] >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 _______________________________________________ Elecraft mailing list Post to: [hidden email] 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 |
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In reply to this post by OH7PS
A good scope is a handy thing to have, but you don't need one to build a K2. Look for a used Tektronix scope if you get one. 100mHz or more, dual trace, delayed sweep. A 465 /475 series is small and portable... or a 7000 series mainframe with plugins gives you more flexibility, is easier to maintain and expand because you can replace plugin modules individually. 73, Larry N8LP OH7PS wrote: > Hi > > I will pretty soon start to solder my K2 and wondering if an > oscilloscope would be handy to have. > > What should I take in consideration choosing one: 50-100-200 MHz > modell or is that relevant? > Whast is must for rf- measurements? > > It's been now nearly 30 years since I've touched a scope. (Maritime > institute - Sparks) > > 73's Ben > OH7PS > _______________________________________________ > Elecraft mailing list > Post to: [hidden email] > 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 > > > Elecraft mailing list Post to: [hidden email] 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 |
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