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21. Re: [Amps] rotary switch - shorting/non-shorting (score: 1): Author: n7ka@comcast.net; Date: Fri, 31 Aug 2007 16:20:57 +0000; Peter and all. This has been MY understanding of a shorting (progressive) rotary switch. On smaller switches the contact bar on the rotor is continuous and progressively shorts contacts together as s; /archives//html/Amps/2007-08/msg00272.html (11,331 bytes)
22. [Amps] L4B Keying (score: 1): Author: N7KA@comcast.net; Date: Thu, 13 Nov 2008 14:54:42 +0000; Does anyone know the open circuit voltage and current requirement for RY1 (the antenna relay) in the L4B. The schematic does not state this info. Arne N7KA ___________________________________________; /archives//html/Amps/2008-11/msg00150.html (6,259 bytes)
23. Re: [Amps] Dud tubes rebuilders... (score: 1): Author: N7KA@comcast.net; Date: Tue, 09 Dec 2008 21:52:18 +0000; In that case use it as a paper weight or door stop to ham room. Maybe base for a lamp. Used to make lamps using TEKTRONIX scope CRTs (those with a flat screen). Arne N7KA ____________________________; /archives//html/Amps/2008-12/msg00179.html (7,961 bytes)
24. [Amps] HV Connector (score: 1): Author: N7KA@comcast.net; Date: Sun, 28 Dec 2008 07:57:33 +0000; MHV style available in polarized and standard mating. Voltage rating 5KVDC. GHV style available Voltage rating 25KVDC. Try www.deltaRF.com for info on both. Arne N7KA ________________________________; /archives//html/Amps/2008-12/msg00353.html (6,264 bytes)
25. Re: [Amps] SB-220 Drive Levels -FTFM (score: 1): Author: N7KA@comcast.net; Date: Fri, 23 Jan 2009 17:12:35 +0000; The manual on page 72 states .5 Amps, 2000V, and Ig of 100-200mA. This is with the SSB/CW switch is in the CW position (lower plate voltage) resulting in 1000W INPUT, the legal limit at the time the; /archives//html/Amps/2009-01/msg00271.html (8,183 bytes)
26. [Amps] ALS-1300 (score: 1): Author: N7KA@comcast.net; Date: Sun, 8 Feb 2009 15:15:31 +0000 (UTC); To make it easy for folks: 1200W output (continuous they state) 1.5 to 22MHz. Not yet available. http://www.mfjenterprises.com/catalog/Pages_01_through_25.pdf Front page lower left corner _________; /archives//html/Amps/2009-02/msg00196.html (7,048 bytes)
27. Re: [Amps] Ten Tec Titan II Blower Replacement? (score: 1): Author: N7KA@comcast.net; Date: Mon, 9 Feb 2009 03:24:51 +0000 (UTC); An approach that might work is to look in Yellow pages under Electric Motors, Repairs and Parts (or similar section) and see if there is a motor repait shop anywhere near you. I know someone that wa; /archives//html/Amps/2009-02/msg00215.html (9,092 bytes)
28. Re: [Amps] OT: Can someone ID this tube and its use ? (score: 1): Author: N7KA@comcast.net; Date: Wed, 1 Apr 2009 22:14:31 +0000 (UTC); It looks like some varia tion of a 4-1000A. The metal base ring appears to have oval vent holes, whereas the 4-400, 4-250, and 4-125 had round vent holes. Its not a 3-400Z, 3-500Z, or 3-1000 beca; /archives//html/Amps/2009-04/msg00018.html (9,407 bytes)
29. [Amps] Radio Switch/Multi-Tech (score: 1): Author: N7KA@comcast.net; Date: Fri, 24 Apr 2009 14:13:30 +0000 (UTC); What are the SUCCESSFUL techniques for removing the pin in the rotor of these switches? IF YOU HAVE SUCCESSFULLY removed these pins I would like to know how it was done and what tools were used. I; /archives//html/Amps/2009-04/msg00311.html (7,203 bytes)
30. Re: [Amps] Eimac AS newsletters (score: 1): Author: N7KA@comcast.net; Date: Fri, 31 Jul 2009 00:37:17 +0000 (UTC); YES. Its the QST September 1971 article. Arne N7KA Does anyone have a copy of EIMAC AS-45? ( design and construction techniques for linear amplifiers using the 8877 ) I have all except this one N8D; /archives//html/Amps/2009-07/msg00417.html (7,312 bytes)
31. Re: [Amps] Re Henry 2KD2 Amplifier (score: 1): Author: N7KA@comcast.net; Date: Fri, 8 Jan 2010 03:33:01 +0000 (UTC); Lets keep the 80-10M amps alive and working well. I want users of those amps to use THEM as designed, on 80-10M. You ask why? Many folks operate from small locations on 80-10M. Just imagine all the; /archives//html/Amps/2010-01/msg00046.html (8,595 bytes)
32. [Amps] HV Conn (score: 1): Author: N7KA@comcast.net; Date: Wed, 13 Jan 2010 15:45:25 +0000 (UTC); Voltage rating p er DELTA catalog: MHV 3500V RMS 5000VDC N 1000V RMS HN 1500V RMS UHF 500V RMS In the MHV series there is a standard and "polarized" mating. Arne N7KA ______; /archives//html/Amps/2010-01/msg00141.html (6,598 bytes)
33. Re: [Amps] Amp keying delay selection (score: 1): Author: N7KA@comcast.net; Date: Sat, 20 Feb 2010 22:30:48 +0000 (UTC); You want menu 7-4 to delay RF output from MK-V until af ter amp relays close. This is the menu used to prevent hot switching of an amps relays. Mine is set at 25ms plenty slow for manual relays of; /archives//html/Amps/2010-02/msg00597.html (7,784 bytes)
34. Re: [Amps] unbuilt SB-220 GONE! (score: 1): Author: N7KA@comcast.net; Date: Wed, 31 Mar 2010 01:35:21 +0000 (UTC); At those prices I can envision every SB-220 owner doing the reverse, un-building their amps, cleaning them thoroughly, and selling them as a kit. I do have one Heathkit unbuilt kit I got from an el; /archives//html/Amps/2010-03/msg00914.html (7,548 bytes)
35. [Amps] HOMEBREW AMP HDW (score: 1): Author: N7KA@comcast.net; Date: Wed, 31 Mar 2010 13:16:34 +0000 (UTC); McMaster CARR is an excellent source of small parts. My catalog is 3600+ pages. Their prices shipped are much lower than purchasing from a local distributor. PEM Fasteners: Look under PEM-STYLE FA; /archives//html/Amps/2010-03/msg00939.html (6,760 bytes)
36. Re: [Amps] dayton (score: 1): Author: N7KA@comcast.net; Date: Tue, 18 May 2010 04:14:36 +0000 (UTC); ELECRAFT introduced a 500W amp at Visalia DX Convention. Think it was KPA-500. Not yet available. Expected in late 2010. May have been at Dayton. 500W 160-6M, same size as K3. Arne N7KA ________; /archives//html/Amps/2010-05/msg00164.html (7,646 bytes)
37. Re: [Amps] 3CX1000A7 (score: 1): Author: N7KA@comcast.net; Date: Tue, 16 Nov 2010 20:44:36 +0000 (UTC); Ohh, but there is a supplier. Go here: http://home.cshore.com/lunarlink/ Arne N7KA To bad there is no one building large VHF amps. _______________________________________________ Amps mailing list; /archives//html/Amps/2010-11/msg00269.html (7,045 bytes)
38. Re: [Amps] Help identifying tubes (score: 1): Author: N7KA@comcast.net; Date: Mon, 29 Nov 2010 05:48:41 +0000 (UTC); Take the guess work out of the equation. Here is a site that provides good info and EIMAC datasheets. Pay attention to the tube diagram pinout (especially pins 2 & 4) and physical dimensions. http:; /archives//html/Amps/2010-11/msg00535.html (8,329 bytes)
39. [Amps] Relay wanted (score: 1): Author: N7KA@comcast.net; Date: Mon, 17 Jan 2011 20:49:44 +0000 (UTC); Posted for K0YW: Wanted DOWKEY SPDT RF relay, KW size, UHF or N connectors, 12 or 24VDC coil. Please Reply to K0YW at centurylink dot net. Thanks Arne N7KA __________________________________________; /archives//html/Amps/2011-01/msg00175.html (6,331 bytes)
40. Re: [Amps] Jennings UCS puller interchangeability ? (score: 1): Author: N7KA@comcast.net; Date: Wed, 4 May 2011 04:19:14 +0000 (UTC); You may have "bellows Couplings". Look through a McMasterCarr catalog, all kinds of adapters and couplings available. Arne N7KA Date: Mon, 2 May 2011 17:36:58 -0700 From: "Jim W7RY" <w7ry@inbox.com; /archives//html/Amps/2011-05/msg00009.html (9,695 bytes)

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