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Total 19 documents matching your query.

1. [Amps] 500 uh plate choke (score: 1): Author: "Vic, K2VCO" <k2vco.vic@gmail.com>; Date: Sat, 19 Jan 2013 11:44:59 -0800; This site http://www.granta.g4axx.com/Linear_design_notes.php3 mentions a 500 uh plate choke specified as RF Parts no. RFC-4L. They tested it and report that it has no series resonances between 1 and; /archives//html/Amps/2013-01/msg00114.html (7,608 bytes)
2. Re: [Amps] 500 uh plate choke (score: 1): Author: Rob Atkinson <ranchorobbo@gmail.com>; Date: Mon, 21 Jan 2013 06:46:16 -0600; That's a pi wound choke (I'd like to know why it is called that). I usually see them in older ham AM rigs where the B+ is 1.5 KV or less and the Ip is no more than a few hundred ma. I am not saying i; /archives//html/Amps/2013-01/msg00120.html (8,983 bytes)
3. Re: [Amps] 500 uh plate choke (score: 1): Author: Bill Turner <dezrat1242@yahoo.com>; Date: Mon, 21 Jan 2013 05:33:53 -0800; REPLY: 500 uH is rather high for amateur use. Most plate chokes are half that or less. If you can't find what you want, RF Parts has a part number RFC-3 that is nearly a universal choke for legal lim; /archives//html/Amps/2013-01/msg00122.html (7,773 bytes)
4. Re: [Amps] 500 uh plate choke (score: 1): Author: "Carl" <km1h@jeremy.mv.com>; Date: Tue, 22 Jan 2013 15:59:13 -0500; Pi stands for pie Rob, resembles a pie plate. In the "old days" the RF tanks were series fed so there was no concern about resonances and a lot of inductance was used. Carl KM1H -- Original Message -; /archives//html/Amps/2013-01/msg00125.html (10,465 bytes)
5. Re: [Amps] 500 uh plate choke (score: 1): Author: Vic K2VCO <k2vco.vic@gmail.com>; Date: Tue, 22 Jan 2013 13:16:10 -0800; I have several large pie-wound chokes, most around 1 mh or more. The thing about this one is that they found no series resonances below 100 mHz. It seemed to me that 500 uh would work well on 160m. I; /archives//html/Amps/2013-01/msg00127.html (10,802 bytes)
6. Re: [Amps] 500 uh plate choke (score: 1): Author: Tom Thompson <tlthompson@qwest.net>; Date: Tue, 22 Jan 2013 15:35:59 -0700; Rob, The network is called a PI network because the shunt capacitors and series inductor resemble the Greek letter PI. Tom W0IVJ I am not saying it won't work in a modern RF power amp but all of the; /archives//html/Amps/2013-01/msg00132.html (10,101 bytes)
7. Re: [Amps] 500 uh plate choke (score: 1): Author: Rob Atkinson <ranchorobbo@gmail.com>; Date: Tue, 22 Jan 2013 17:21:38 -0600; It's a plate choke; the shunt caps are on one end; it's not an output network. 73 Rob K5UJ _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contestin; /archives//html/Amps/2013-01/msg00133.html (11,031 bytes)
8. Re: [Amps] 500 uh plate choke (score: 1): Author: Rob Atkinson <ranchorobbo@gmail.com>; Date: Tue, 22 Jan 2013 17:30:04 -0600; you can test your chokes yourself. Get a modern solid state ham rig and fix it so it puts out around 20 watts cw. dump the RF into a 50 ohm resistor and put a T in the line. Connect the stem of the T; /archives//html/Amps/2013-01/msg00134.html (9,476 bytes)
9. [Amps] 500 uh plate choke (score: 1): Author: John Lyles <jtml@losalamos.com>; Date: Thu, 24 Jan 2013 05:34:28 -0700; K5UJ posted a really great idea to test an RF Choke for resonances, without needing even a GDO, (although every ham should still have one of these - in addition to an Almost All Digital L/C IIB meter; /archives//html/Amps/2013-01/msg00139.html (7,822 bytes)
10. Re: [Amps] 500 uh plate choke (score: 1): Author: Rob Atkinson <ranchorobbo@gmail.com>; Date: Thu, 24 Jan 2013 09:06:11 -0600; Thanks John, but I can't take credit for this--I got the idea from a page on W8JI's website and I should have credited him initially but I was in a hurry and didn't think to do that. 73 Rob K5UJ ____; /archives//html/Amps/2013-01/msg00142.html (8,724 bytes)
11. [Amps] 500 uh plate choke (score: 1): Author: "Jim Thomson" <jim.thom@telus.net>; Date: Fri, 25 Jan 2013 03:32:34 -0800; K5UJ posted a really great idea to test an RF Choke for resonances, without needing even a GDO, (although every ham should still have one of these - in addition to an Almost All Digital L/C IIB meter; /archives//html/Amps/2013-01/msg00149.html (11,882 bytes)
12. Re: [Amps] 500 uh plate choke (score: 1): Author: Bill Turner <dezrat1242@yahoo.com>; Date: Fri, 25 Jan 2013 04:43:38 -0800; REPLY: That's correct, but remember... A parallel resonant circuit has circulating current inside it. As you drop the inductance of the choke the circulating current increases and if you drop it too; /archives//html/Amps/2013-01/msg00150.html (8,405 bytes)
13. Re: [Amps] 500 uh plate choke (score: 1): Author: Rob Atkinson <ranchorobbo@gmail.com>; Date: Fri, 25 Jan 2013 09:29:26 -0600; I was quick to credit W8JI in a subsequent post--I certainly do not want to be seen as stealing ideas, but for some reason anything I post to this reflector seems to be delayed by 24 hours or longer.; /archives//html/Amps/2013-01/msg00152.html (9,080 bytes)
14. Re: [Amps] 500 uh plate choke (score: 1): Author: "Carl" <km1h@jeremy.mv.com>; Date: Fri, 25 Jan 2013 16:06:47 -0500; I wouldnt worry about that Rob, JI never gives credit for ideas he steals and puts on his pages anyway. Carl KM1H I was quick to credit W8JI in a subsequent post--I certainly do not want to be seen a; /archives//html/Amps/2013-01/msg00156.html (9,706 bytes)
15. Re: [Amps] 500 uh plate choke (score: 1): Author: "Jim W7RY" <w7ry@centurytel.net>; Date: Fri, 25 Jan 2013 19:03:04 -0800; I'm about tired of this moderated list too. Takes DAYS for posts to show up which looses it luster after a while. If they even do show up. Which this one probably won't. 73 Jim W7RY --Original Messag; /archives//html/Amps/2013-01/msg00157.html (10,107 bytes)
16. Re: [Amps] 500 uh plate choke (score: 1): Author: "Jim W7RY" <w7ry@centurytel.net>; Date: Fri, 25 Jan 2013 17:25:25 -0800; Oh please Carl! 73 Jim W7RY I wouldnt worry about that Rob, JI never gives credit for ideas he steals and puts on his pages anyway. Carl KM1H I was quick to credit W8JI in a subsequent post--I certai; /archives//html/Amps/2013-01/msg00158.html (11,088 bytes)
17. Re: [Amps] 500 uh plate choke (score: 1): Author: "Jim Thomson" <jim.thom@telus.net>; Date: Fri, 25 Jan 2013 19:06:27 -0800; Ameritron 811 amps. Wonder where he got that idea from. Jim VE7RF --Original Message-- From: Jim W7RY Sent: Friday, January 25, 2013 5:25 PM To: Carl ; Rob Atkinson ; Jim Thomson Cc: amps@contesting; /archives//html/Amps/2013-01/msg00159.html (11,211 bytes)
18. Re: [Amps] 500 uh plate choke (score: 1): Author: "Carl" <km1h@jeremy.mv.com>; Date: Sat, 26 Jan 2013 08:29:03 -0500; I can positively guarantee it wasnt his own (-; Carl KM1H Ameritron 811 amps. Wonder where he got that idea from. Jim VE7RF --Original Message-- From: Jim W7RY Sent: Friday, January 25, 2013 5:25 PM; /archives//html/Amps/2013-01/msg00160.html (11,491 bytes)
19. Re: [Amps] 500 uh plate choke (score: 1): Author: Bill Turner <dezrat1242@yahoo.com>; Date: Mon, 28 Jan 2013 12:12:27 -0800; REPLY: Not having access to one of those, could you please describe it? Thanks, Bill, W6WRT _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesti; /archives//html/Amps/2013-01/msg00167.html (8,573 bytes)

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