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1. [Amps] Eimac vs Svetlana (score: 1): Author: W6NQ <w6nq@rfparts.com> (W6NQ); Date: Tue, 17 Dec 2002 17:54:01 -0800; The company I work for supplies the Svetlana 4CX350A tube to the Coast Guard and other government customers. The buyers verify that the 4CX350A Svetlana tube significantly outlasts the current produc; /archives//html/Amps/2002-12/msg00219.html (7,520 bytes)
2. [Amps] motel-Dayton (score: 1): Author: W6NQ <w6nq@rfparts.com> (W6NQ); Date: Wed, 08 May 2002 08:52:49 -0700; If anyone needs a close-in motel at Dayton-- I have two extra rooms which am turning back by tomorrow. Howard Johnson, on Poe Rd, off Hwy 75. ..........Merit; /archives//html/Amps/2002-05/msg00092.html (6,160 bytes)
3. [Amps] room- Dayton (score: 1): Author: W6NQ <w6nq@rfparts.com> (W6NQ); Date: Wed, 08 May 2002 20:25:15 -0700; I have extra room available for Dayton. Good rate & location. Howard Johnson on Poe & Hwy 75. Will be turning it back tomorrow if no interest. Merit; /archives//html/Amps/2002-05/msg00104.html (6,198 bytes)
4. [Amps] SB-200 Problem (score: 1): Author: W6NQ <w6nq@rfparts.com> (W6NQ); Date: Mon, 04 Mar 2002 20:29:13 -0800; Hi Chuck: Previous comments have given you have a wealth of good info to explore. One thing not mentioned is the possibility that you might have a shorted or gassy tube at this time. Shorted tubes us; /archives//html/Amps/2002-03/msg00066.html (11,677 bytes)
5. [AMPS] Euro Sub For Eimac 3CX800A7 (score: 1): Author: W6NQ <w6nq@rfparts.com> (W6NQ); Date: Wed, 06 Feb 2002 15:32:30 -0800; FYI-- Svetlana is still building the 3CX800A7 tube. It has not been dropped from their product list. Main difficulty, Russian plant still using capacity to build whatever they can, often not on the U; /archives//html/Amps/2002-02/msg00060.html (9,483 bytes)
6. [AMPS] 4CX1600B source? (score: 1): Author: W6NQ <w6nq@rfparts.com> (W6NQ); Date: Thu, 10 Jan 2002 16:54:21 -0800; Here is the straight scoop on the "illusive" 4CX1600B. It has been a tube of limited production until now. However, the factory assures me that they will be built in greater larger quantities shortly; /archives//html/Amps/2002-01/msg00083.html (7,452 bytes)
7. [AMPS] amplifier help (score: 1): Author: W6NQ <w6nq@rfparts.com> (W6NQ); Date: Wed, 16 Jan 2002 18:23:47 -0800; Hi Ron: Follows are a few general suggestions to follow along after the excellent comments of others. 1.) Optimum Ic for reasonable IMD is 100 ma. or so per device. Amp stability seems a bit easier t; /archives//html/Amps/2002-01/msg00117.html (17,454 bytes)
8. [AMPS] Bypassing Screen of 4cx800a for 50 MHz (score: 1): Author: W6NQ <w6nq@rfparts.com> (W6NQ); Date: Thu, 13 Dec 2001 17:15:15 -0800; Has anyone had any experience with the Svetlana 4cx800A at 50 MHz? How critical was method of screen bypass cap? Thanks Merit -- FAQ on WWW: http://www.contesting.com/FAQ/amps Submissions: amps@conte; /archives//html/Amps/2001-12/msg00220.html (7,953 bytes)
9. [AMPS] Metron MA 1000B - help needed (score: 1): Author: W6NQ" <w6nq@rfparts.com (W6NQ); Date: Wed, 21 Mar 2001 16:22:25 -0800; Follows a few additional comments on this amp: Sounds like a lot of gain with the two units. Watch out for output RF getting into the amp input circuit and radio mic wiring. (The usual grounding prac; /archives//html/Amps/2001-03/msg00184.html (8,621 bytes)
10. [AMPS] Building AMP with four valves in parallel (4-250) - any guidance ? (score: 1): Author: W6NQ" <w6nq@rfparts.com (W6NQ); Date: Sun, 10 Dec 2000 15:07:32 -0800; This is a multi-part message in MIME format. --=_NextPart_000_005E_01C062BA.EBB1A1A0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Perhaps your filament v; /archives//html/Amps/2000-12/msg00186.html (11,930 bytes)
11. [AMPS] Amperex and Penta Labs (score: 1): Author: W6NQ" <w6nq@rfparts.com (W6NQ); Date: Thu, 21 Sep 2000 09:01:08 -0700; As I recall, the original Penta Laboratories closed their doors many years before the current company was established (c. 1990)..... I remember Steve Sanett as being the principal owner of Aero Elect; /archives//html/Amps/2000-09/msg00937.html (7,962 bytes)
12. [AMPS] 31LQ6 (score: 1): Author: W6NQ" <w6nq@rfparts.com (W6NQ); Date: Mon, 1 May 2000 16:01:48 -0700; Just a note to the above remark on controlled warm up time-- Remember to put a series resistor or thermister in the primary for a soft start. Sweep tubes designed for "Series String Filaments" i.e 3; /archives//html/Amps/2000-05/msg00015.html (8,724 bytes)
13. [AMPS] Unruly L-7 Amplifier (score: 1): Author: W6NQ" <w6nq@rfparts.com (W6NQ); Date: Sun, 7 May 2000 10:10:38 -0700; Jeff: This really sounds like one of two things to me: (1.) An intermittant Grid-Filament short from one of the 3-500Z. The low drive problem mentioned may be a tipoff that the cathode sees a path to; /archives//html/Amps/2000-05/msg00088.html (9,316 bytes)
14. [AMPS] sb220 on 6m (score: 1): Author: W6NQ" <w6nq@rfparts.com (W6NQ); Date: Thu, 11 May 2000 08:06:19 -0700; What has been found to be the best way in handling grounding of grids for 6m? Direct connection or through convential parallel resistor/cap combination? ............Thanks, Merit W6NQ -- FAQ on WWW:; /archives//html/Amps/2000-05/msg00137.html (6,787 bytes)
15. [AMPS] Can anyone Identify an Amplifier part? (score: 1): Author: W6NQ" <w6nq@rfparts.com (W6NQ); Date: Mon, 3 Apr 2000 12:31:21 -0700; This is a multi-part message in MIME format. --=_NextPart_000_027D_01BF9D68.843B4660 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable These are metal cased m; /archives//html/Amps/2000-04/msg00017.html (8,818 bytes)
16. [AMPS] Diode stacks (score: 1): Author: W6NQ" <w6nq@rfparts.com (W6NQ); Date: Tue, 1 Feb 2000 17:04:01 -0800; Diode stack #24050 is rated at 32KV PIV with center tap, allowing two units to be used in bridge configuration. They are rated at a conservative 1.2A CCS with a 60A surge current. Diodes are individu; /archives//html/Amps/2000-02/msg00001.html (8,965 bytes)
17. [AMPS] SB-230 re-tube? (score: 1): Author: W6NQ" <w6nq@rfparts.com (W6NQ); Date: Mon, 13 Dec 1999 20:29:54 -0800; You might also want to look into another version of the 8873, which is the 8874/3CX400A7 triode. It uses the same socket as the 8873. No screen supply required. Modification for air from the bottom i; /archives//html/Amps/1999-12/msg00145.html (7,897 bytes)
18. [AMPS] Whither the 807? (score: 1): Author: W6NQ" <w6nq@rfparts.com (W6NQ); Date: Mon, 1 Nov 1999 17:16:23 -0800; Did anyone out there ever make a "beer can vertical"? That's where you invite all your buddies over for an antenna raising party, solder the cans together (when they were made of steel), and see how; /archives//html/Amps/1999-11/msg00059.html (8,472 bytes)
19. [AMPS] EIMAC 8560A (score: 1): Author: W6NQ" <w6nq@rfparts.com (W6NQ); Date: Sun, 14 Nov 1999 11:20:08 -0800; HI Monty: It's specs are similar to the 4CX250B, a tetrode, including bias/screen voltages, etc. Regards, Merit W6NQ -- FAQ on WWW: http://www.contesting.com/ampsfaq.html Submissions: amps@contesting; /archives//html/Amps/1999-11/msg00320.html (7,001 bytes)
20. [AMPS] Svetlana 4CX1600B (score: 1): Author: W6NQ" <w6nq@rfparts.com (W6NQ); Date: Tue, 23 Nov 1999 18:28:04 -0800; This tube has been hard to find. A new shipment from factory arrived, and I have five tubes set aside if anyone is looking for one. (Sockets, also.) Contact me direct. 73, Merit W6NQ -- FAQ on WWW: h; /archives//html/Amps/1999-11/msg00453.html (6,703 bytes)

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