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Total 72 documents matching your query.

1. [AMPS] Plate Choke (score: 1): Author: w3nr@vol.com (Ed W3NR); Date: Fri, 27 Oct 2000 20:15:22 -0400; I am in need of some help on winding a Plate Choke for 4- 811A's to cover 10-160 plus WARC. The form I have has 41/2" of winding space at 3/4" diameter. Is there a decent design out there that will f; /archives//html/Amps/2000-10/msg00620.html (7,174 bytes)
2. [AMPS] Plate Choke (score: 1): Author: 2@vc.net (measures); Date: Fri, 27 Oct 2000 22:23:57 -0700; spacing between sections makes very little difference in self resonances. I would use #28 high temp motor rewinding wire. Apply coat of varnish to secure winding. Let dry. Remove turns as needed to; /archives//html/Amps/2000-10/msg00621.html (7,431 bytes)
3. [AMPS] Plate Choke (score: 1): Author: ccc@space.mit.edu (Chuck Counselman); Date: Sat, 28 Oct 2000 11:26:10 -0400; Please excuse a novice's ignorant questions about plate chokes. OTOH, maybe I'm not the only AMPS subscriber who wonders. Is the lowest-frequency self-resonance a "parallel" resonance, i.e., such tha; /archives//html/Amps/2000-10/msg00632.html (7,301 bytes)
4. [AMPS] Plate Choke (score: 1): Author: 2@vc.net (measures); Date: Sat, 28 Oct 2000 09:31:12 -0700; To avoid choke fires, keep all resonances at least 6% from amateur bands. Choke resonances should be checked with the hv rf choke wired into the circuit and not shorted. end - Rich..., 805.386.3734,; /archives//html/Amps/2000-10/msg00635.html (7,564 bytes)
5. Fw: [AMPS] Plate Choke (score: 1): Author: royanjoy@ncn.net (Roy Koeppe); Date: Sat, 28 Oct 2000 11:56:39 -0500; Hi Chuck--you asked, "Is the lowest-frequency self-resonance a "parallel" resonance, i.e., such that the impedance of the choke is very high?" YES "Is power-amplifier operation at a parallel-resonant; /archives//html/Amps/2000-10/msg00636.html (7,382 bytes)
6. [AMPS] Plate Choke (score: 1): Author: wb8jkr@juno.com (Mark S Graalman); Date: Sat, 28 Oct 2000 13:42:16 -0400; Chuck, writes: Choke Z is maximum at the parallel resonant frequency. Technically the choke would work best at a parallel resonant point where Z would be at maximum. At the series resonant point the; /archives//html/Amps/2000-10/msg00637.html (8,093 bytes)
7. [AMPS] Plate Choke (score: 1): Author: n4kw@citrus.infi.net (Pete Raymond); Date: Mon, 28 Dec 1998 09:42:27 -0800; I have a plate choke that has 104 turns on what I believe is a porcelain form 1"X 3 1/4" . I shorted the ends and checked it with my grid dipper. I found two nice dips one at 20.9mhz and another at 2; /archives//html/Amps/1998-12/msg00441.html (6,950 bytes)
8. [AMPS] Plate Choke (score: 1): Author: rakefet@rakefet.com (Vic Rosenthal); Date: Mon, 28 Dec 1998 08:02:14 -0800; I recently went through a big 'fix-the-choke' project. I found that the resonant points with the choke installed in the amplifier were significantly different than they were with the choke on the ben; /archives//html/Amps/1998-12/msg00442.html (7,594 bytes)
9. [AMPS] Plate Choke (score: 1): Author: km1h@juno.com (km1h@juno.com); Date: Mon, 28 Dec 1998 11:47:42 -0500; On Mon, 28 Dec 1998 09:42:27 -0800 Pete Raymond <n4kw@citrus.infi.net> writes: Way too close when in circuit Pete. If the resonances move down a mHz or so you will be OK. 73 Carl KM1H _______________; /archives//html/Amps/1998-12/msg00444.html (8,099 bytes)
10. [AMPS] Plate Choke (score: 1): Author: measures@vc.net (Rich Measures); Date: Mon, 28 Dec 1998 10:03:00 -0800; ? True, Pete. A choke fire would be quite likely on 15m (&/or Ch. 40) unless drastic measures are taken before hand. It would be a simple matter to park the choke resonances higher in freq. by discr; /archives//html/Amps/1998-12/msg00447.html (7,544 bytes)
11. [AMPS] Plate choke (score: 1): Author: palstar@erinet.com (Paul Hrivnak); Date: Fri, 27 Mar 1998 13:41:29 -0500 (EST); The choke cofiguration I used when I was at Drake in 1995 when I did the new L85 single tube 3-500Z ( now cancelled ) is as follows (1) 1" dia x 6" ceramic steatite form unglazed (2) wound with #22 n; /archives//html/Amps/1998-03/msg00462.html (8,341 bytes)
12. [AMPS] Plate choke (score: 1): Author: km1h@juno.com (km1h @ juno.com); Date: Fri, 27 Mar 1998 14:09:26 EST; Sounds like a lot of work and expense for just a single 3-500Z amp IMO. Why not just copy the AL-80A/SB-1000 design and be done with it? They DO work in case you were not aware of it. Or is there Eng; /archives//html/Amps/1998-03/msg00463.html (9,734 bytes)
13. [AMPS] Plate choke (score: 1): Author: wes@Iphase.COM (Wes Atchison); Date: Mon, 30 Mar 1998 09:19:37 -0600; Carl, I have been following this tread on Plate RFC's. I have a single 3-500Z amp made by AEA, now out of business, called a LA-30. I may have missed the design info on the RFC used in the AL-80A/SB-; /archives//html/Amps/1998-03/msg00480.html (11,343 bytes)
14. [AMPS] Plate choke (score: 1): Author: km1h@juno.com (km1h @ juno.com); Date: Mon, 30 Mar 1998 13:23:44 EST; That was another amp with a very short life span Wes ( a renamed Vectronics). There are any number of chokes that would work but I would need the dimensions you have to work with. I converted a few o; /archives//html/Amps/1998-03/msg00485.html (11,136 bytes)
15. [AMPS] Plate Choke (score: 1): Author: w5hvv@aeneas.net (Roderick M. Fitz-Randolph); Date: Fri, 12 Dec 1997 08:25:13 -0600; This is not exactly along the lines of this reflector but I know the expertise is certainly here, hence the following: I am in hopes that someone here can offer me some direction on how to wind a pla; /archives//html/Amps/1997-12/msg00249.html (7,127 bytes)
16. [AMPS] Plate Choke (score: 1): Author: km1h@juno.com (km1h @ juno.com); Date: Fri, 12 Dec 1997 09:44:38 EST; The ARRL handbook has covered this for ages Rod. However at 160M I doubt that you have the equipment to turn out a 1mH or larger RFC. RF to PS isolation is a lot more critical in that Hartley and a g; /archives//html/Amps/1997-12/msg00251.html (7,990 bytes)
17. [Amps] plate choke (score: 1): Author: "Harold B. Mandel" <ka1xo@juno.com>; Date: Wed, 13 Apr 2005 18:08:08 -0400; Dear Francis, Here are some basic choices for coils. The highlighted 24AWG coil on a 1.25" form seems the most exciting choice. However, the 28AWG will carry 640 mils, possibly, but I like to give it; /archives//html/Amps/2005-04/msg00268.html (7,554 bytes)
18. Re: [Amps] plate choke (score: 1): Author: "Bob Maser" <bmaser@tampabay.rr.com>; Date: Wed, 13 Apr 2005 20:06:01 -0400; McMaster/Carr sells electrical grade PTFE 1-1/2" rod for $35.04 per foot. I don't call that expensive. Look up the material and many more on their website http://www.mcmaster.com/ I bought some Oil f; /archives//html/Amps/2005-04/msg00270.html (9,270 bytes)
19. Re: [Amps] plate choke (score: 1): Author: R.Measures <r@somis.org>; Date: Thu, 14 Apr 2005 03:15:49 -0700; In single-layer solenoid-wound HV-RFC service, #24 Cu will easily carry 4-amperes. Larger diameter =s more distributed C. Richard L. Measures, AG6K, 805.386.3734. www.somis.org ______________________; /archives//html/Amps/2005-04/msg00272.html (9,162 bytes)
20. Re: [Amps] plate choke (score: 1): Author: R.Measures <r@somis.org>; Date: Thu, 14 Apr 2005 03:25:37 -0700; Plastifab (818 967 9376) carries various diameters of G-10 tubing. 0.75" dia goes for around $1.20 a foot. G-10 is RF-friendly, does not cold-flow like TFE, and it is easy to fabricate. Richard L. Me; /archives//html/Amps/2005-04/msg00273.html (10,592 bytes)

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