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References: [ +from:jmellis@ihug.co.nz: 29 ]

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1. [AMPS] Re: Copper tube - semi-rigid (score: 1): Author: jmellis@ihug.co.nz (Martin Ellis); Date: Sat, 29 Apr 2000 08:06:32 +1200; Try refrigeration repair specialists. But most multiband amplifiers have a solid wire coil which is switched in on 40/80/160m. The coaxial feed would require tubing for all bands, is it worth the ef; /archives//html/Amps/2000-04/msg00183.html (7,768 bytes)
2. [AMPS] Re: Plate chokes and other mysteries... (score: 1): Author: jmellis@ihug.co.nz (Martin Ellis); Date: Sun, 12 Mar 2000 19:25:31 +1300; Hello John, Are you able to tell us the band and method of use when the plate choke went? Regards Martin ZL1ANJ -- FAQ on WWW: http://www.contesting.com/ampsfaq.html Submissions: amps@contesting.com; /archives//html/Amps/2000-03/msg00592.html (7,591 bytes)
3. [AMPS] Color in 3-500z (was Rocky Point effects) (score: 1): Author: jmellis@ihug.co.nz (Martin Ellis); Date: Thu, 16 Mar 2000 11:13:17 +1300; Good morning, I agree with Tom. 3-500z tubes have proved reliable for me in regular amateur service. But of four spare unused 3-500z tubes, that were on the shelf for 12 years, only one has proved to; /archives//html/Amps/2000-03/msg00716.html (7,345 bytes)
4. [AMPS] 2 x 3-500z amplifiers (score: 1): Author: jmellis@ihug.co.nz (Martin Ellis); Date: Mon, 20 Mar 2000 16:12:07 +1200; Good morning, While activity is quiet on the reflector, I would like to raise a question about the TL922 amplifier: How can we assess the performance of individual tubes in a TL922? For example, afte; /archives//html/Amps/2000-03/msg00826.html (7,243 bytes)
5. [AMPS] Re: Power supply question (score: 1): Author: jmellis@ihug.co.nz (Martin Ellis); Date: Sun, 23 May 1999 11:43:29 +1200; Hello Vic, I have a Heath SB1000 which is designed for 120 or 240 volts, and it has a 110v fan. In the case of 240v AC supply, the two primary windings of T1 are in series, and the fan is connected a; /archives//html/Amps/1999-05/msg00288.html (7,369 bytes)
6. [AMPS] Re: Heathkit SB-1000 choke values? (score: 1): Author: jmellis@ihug.co.nz (Martin Ellis); Date: Sun, 25 Apr 1999 19:49:00 +1200; Hello Skip, I have a SB1000 and I obtained the "sholdered" replacement RF choke from Heathkit before they dropped Amateur equipment. The original choke is fine for 160-80-40-20-15-10 The newer choke; /archives//html/Amps/1999-04/msg00389.html (7,539 bytes)
7. [AMPS] Re: CW amplifier tubes (score: 1): Author: jmellis@ihug.co.nz (Martin Ellis); Date: Sat, 20 Mar 1999 12:41:01 +1300; Carl KM1H replied: The amplifier that seems to run cool and quiet is the KW TL922. This uses a fan on the rear of the cabinet. It does not blow air across the tubes. The fan is mounted directly behin; /archives//html/Amps/1999-03/msg00499.html (7,641 bytes)
8. [AMPS] Re: Later??? (score: 1): Author: jmellis@ihug.co.nz (Martin Ellis); Date: Tue, 29 Dec 1998 15:06:32 +1300; HNY Lars. If you were around in the beginning of the Rock Era, I seem to remember that the first song was Rock Around the Clock <Bill Haley>, and the follow up was See You LATER Alligator. The equiva; /archives//html/Amps/1998-12/msg00458.html (7,149 bytes)
9. [AMPS] TL-922A 10m conversion (score: 1): Author: jmellis@ihug.co.nz (Martin Ellis); Date: Wed, 11 Nov 1998 22:31:21 +1300; Hello Roger, The input caps on the TL922 are: Band Value 10m 120P 15m 120P 20m 220P 40m 470P 80m 550P 160m 1560P Cheers, Martin ZL1ANJ -- FAQ on WWW: http://www.contesting.com/ampfaq.html Submissions; /archives//html/Amps/1998-11/msg00163.html (7,119 bytes)
10. [AMPS] Re: TET/EMTRON (score: 1): Author: jmellis@ihug.co.nz (Martin Ellis); Date: Fri, 13 Nov 1998 09:32:05 +1300; Hello Peter, The history of TET is quite interestingThe original company was founded by JG1PEA Taniguchi-san. The company details were Taniguchi Engineering Traders, 2589-1 Shimonagaya-cho, Kohnan-Ku; /archives//html/Amps/1998-11/msg00180.html (8,159 bytes)
11. [AMPS] Re: Tuner trouble (score: 1): Author: jmellis@ihug.co.nz (Martin Ellis); Date: Thu, 26 Nov 1998 15:08:18 +1300; Hello Henry. The MB-V-A is a little unusual in that part of the balun winding is in circuit all the time, except when you select the "A Direct" switch. That means that RF passes thru part of the balu; /archives//html/Amps/1998-11/msg00336.html (7,443 bytes)
12. [AMPS] Re: TL-922 (score: 1): Author: jmellis@ihug.co.nz (Martin Ellis); Date: Tue, 22 Sep 1998 00:34:30 +1200; Hello Gus, Be sure you check the two 470 uH grid chokes for continuity. Then check the bias voltage supply, to ensure that a possible grid-filament short did not damage it. Regards, Martin ZL1ANJ --; /archives//html/Amps/1998-09/msg00217.html (7,230 bytes)
13. [AMPS] Re: 3-600Z (score: 1): Author: jmellis@ihug.co.nz (Martin Ellis); Date: Thu, 06 Aug 1998 08:36:26 +1200; Do you think that when the manufacturer has upped anode dissipation, we could increase anode volts and get more Po for same Ia? At least we can pray that grid/filament shorts are designed out of the; /archives//html/Amps/1998-08/msg00039.html (7,155 bytes)
14. [AMPS] Re: Calculating input vs output (score: 1): Author: jmellis@ihug.co.nz (Martin Ellis); Date: Tue, 21 Jul 1998 10:10:01 +1200; to output? Does this ratio change for different amps/tubes/designs/modes/class? Hello Al, As I recall the power ratio is best described in db. For example for a pair of 3-500z in GG the power gain is; /archives//html/Amps/1998-07/msg00109.html (7,223 bytes)
15. [AMPS] Re: Neutralization 572Bs (score: 1): Author: jmellis@ihug.co.nz (Martin Ellis); Date: Sat, 23 May 1998 14:20:09 +1200; Good morning, In the early 1980s I had a bad case of instability on 10M in a FL2100B which uses a pair of 572Bs. My elmer was Ray ZL1GG (one grounded-grid), who gave me a copy of the FL2100z circuit.; /archives//html/Amps/1998-05/msg00509.html (7,864 bytes)
16. [AMPS] Re: SB-1000 WARC usage (score: 1): Author: jmellis@ihug.co.nz (Martin Ellis); Date: Fri, 29 May 1998 08:39:15 +1200; Hello Vic, Not sure of the serial # of your SB1000. I purchased a kit in 1989 from Portland Radio, and soon after assembly, I was advised that Heathkit had released a new plate circuit RFC. I was sen; /archives//html/Amps/1998-05/msg00615.html (7,955 bytes)
17. [AMPS] Re: Broadband tube type "no tune" amplifiers. (score: 1): Author: jmellis@ihug.co.nz (Martin Ellis); Date: Thu, 09 Apr 1998 22:31:45 +1200; There was a series of No-Tune amplifiers sold by Amp Supply Co. I have a brochure for the LK-800A which featured three 3CX-800A7 tubes. I understand this was released at Dayton 1985. The unit was pri; /archives//html/Amps/1998-04/msg00069.html (8,096 bytes)
18. [AMPS] Re: ARCING MORE (score: 1): Author: jmellis@ihug.co.nz (Martin Ellis); Date: Fri, 17 Apr 1998 09:03:30 +1200; Hello Dick, Would you expect damage in an amplifier, when the operator changes the transceiver and antenna to a new band, but neglects to alter the band change switch in the amplifier? One of my gues; /archives//html/Amps/1998-04/msg00112.html (9,635 bytes)
19. [AMPS] Re: Building of First amp - 813 (score: 1): Author: jmellis@ihug.co.nz (Martin Ellis); Date: Thu, 12 Feb 1998 10:11:36 +1300; Hello John, The 813 is a very rugged tube and has the reputation of being almost indestructable in amateur service. It is common to use it as a triode. The main limitation of the 813 in conventional; /archives//html/Amps/1998-02/msg00072.html (8,343 bytes)
20. [AMPS] Re: Filter Capacitors (score: 1): Author: jmellis@ihug.co.nz (Martin Ellis); Date: Fri, 13 Feb 1998 15:39:50 +1300; Old electrolytic capacitors need to be *formed* by applying HV in steps, ramping up across 12-24 hours. If they end up taking full rated HV without going out of spec, then they are ready to go back i; /archives//html/Amps/1998-02/msg00082.html (8,169 bytes)

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