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Total 27 documents matching your query.

1. [AMPS] Caveat on Dentron Filaments + MLA-2500B Notes (score: 1): Author: philk5pc@tyler.net (Phil Clements); Date: Tue, 1 Aug 2000 10:03:37 -0500; Sort of like putting touch-up paint on the Mona Lisa! I hear you, Peter! (((73))) Phil, K5PC -- FAQ on WWW: http://www.contesting.com/FAQ/amps Submissions: amps@contesting.com Administrative requests; /archives//html/Amps/2000-08/msg00007.html (7,712 bytes)
2. [AMPS] Caveat on Dentron Filaments + MLA-2500B Notes (score: 1): Author: Peter_Chadwick@mitel.com (Peter Chadwick); Date: Tue, 1 Aug 2000 15:42:18 +0100; You know that good old New England saying - 'If it ain't bust, don't fix it' - there's a helluva lot of truth in it. 73 Peter G3RZP -- FAQ on WWW: http://www.contesting.com/FAQ/amps Submissions: amps; /archives//html/Amps/2000-08/msg00005.html (7,489 bytes)
3. [AMPS] Caveat on Dentron Filaments + MLA-2500B Notes (score: 1): Author: philk5pc@tyler.net (Phil Clements); Date: Tue, 1 Aug 2000 09:37:54 -0500; Using the "stock" 100 ohm 25 watt metal-clad resistor in my MLA-2500B, the input VSWR is 1:1 on 160-10 meters. Even if it has an inductive component it is hard to beat for a perfect match to the exc; /archives//html/Amps/2000-08/msg00004.html (8,312 bytes)
4. [AMPS] Caveat on Dentron Filaments + MLA-2500B Notes (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Tue, 1 Aug 2000 04:59:28 -0400; Dentron used surplus resistors and other components from Electronic Surplus in Cleveland Ohio every chance they got. The resistors were generally standard wire wounds. 73, Tom W8JI w8ji@contesting.c; /archives//html/Amps/2000-08/msg00002.html (7,820 bytes)
5. [AMPS] Caveat on Dentron Filaments + MLA-2500B Notes (score: 1): Author: Peter_Chadwick@mitel.com (Peter Chadwick); Date: Tue, 1 Aug 2000 07:38:31 +0100; Not all the Dale type metal clad resistors are inductive - certainly over here, there's a manufacturer who makes a non inductive variety. It uses Ayrton-Perry winding. I have some of these rated 200; /archives//html/Amps/2000-08/msg00001.html (7,541 bytes)
6. [AMPS] Caveat on Dentron Filaments + MLA-2500B Notes (score: 1): Author: philk5pc@tyler.net (Phil Clements); Date: Mon, 31 Jul 2000 20:24:34 -0500; Any idea what the part number of an appropriate device is? Let's get this strait...from each cathode, we will have a 40 ohm resistor. The 40 ohm resistors tie together with the 72 ohm shunt resistor; /archives//html/Amps/2000-07/msg00006.html (8,873 bytes)
7. [AMPS] Caveat on Dentron Filaments + MLA-2500B Notes (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Mon, 31 Jul 2000 21:18:03 -0400; An unbypassed equal-value series-resistance placed at each cathode will equalize the tube currents and reduce the IMD, as well as swamping the drive. The smartest engineering always uses one part fo; /archives//html/Amps/2000-07/msg00005.html (9,973 bytes)
8. [AMPS] Caveat on Dentron Filaments + MLA-2500B Notes (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Mon, 31 Jul 2000 21:05:52 -0400; What is the reverse recovery time of the diode you used? 73, Tom W8JI w8ji@contesting.com -- FAQ on WWW: http://www.contesting.com/FAQ/amps Submissions: amps@contesting.com Administrative requests:; /archives//html/Amps/2000-07/msg00004.html (8,883 bytes)
9. [AMPS] Caveat on Dentron Filaments + MLA-2500B Notes (score: 1): Author: 2@vc.net (measures); Date: Mon, 31 Jul 2000 17:55:57 -0700; ? Yes. Also, the orig. shunt resistor was wire wound. The cathodes themselves are c. 27-ohms avg. so a series cathode-resistor is needed to increase the driving Z of the cathodes. Another circuit im; /archives//html/Amps/2000-07/msg00003.html (9,257 bytes)
10. [AMPS] Caveat on Dentron Filaments + MLA-2500B Notes (score: 1): Author: philk5pc@tyler.net (Phil Clements); Date: Mon, 31 Jul 2000 19:02:45 -0500; Okay...let's replace it..... Was 100 ohms a bad choice also for a pair of 8875's? I happen to have a carborundum 72 ohm @ 50 watts....how would that be? (((73))) Phil, K5PC -- FAQ on WWW: http://www; /archives//html/Amps/2000-07/msg00001.html (9,473 bytes)
11. [AMPS] Caveat on Dentron Filaments + MLA-2500B Notes (score: 1): Author: w8ik@subich.com (Joe Subich, W8IK); Date: Mon, 31 Jul 2000 19:17:59 -0400; Yes, Dentron used the Dale resistors ... not a good choice. -- FAQ on WWW: http://www.contesting.com/FAQ/amps Submissions: amps@contesting.com Administrative requests: amps-REQUEST@contesting.com Pr; /archives//html/Amps/2000-07/msg00000.html (9,508 bytes)
12. [AMPS] Caveat on Dentron Filaments + MLA-2500B Notes (score: 1): Author: kc4slk@csrlink.net (Mike Sawyer); Date: Mon, 31 Jul 2000 18:24:40 -0400; <snip> Probably true. It is one of those that are in a gold metal rectangular case. 100 ohms @ 25 watts. These sound like Dale resistors. They are designed to "pop-out" from the ends when the power r; /archives//html/Amps/2000-07/msg00228.html (9,704 bytes)
13. [AMPS] Caveat on Dentron Filaments + MLA-2500B Notes (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Mon, 31 Jul 2000 12:21:56 -0400; I hope what you are using to measure the inductor measures it at the operating frequency! 73, Tom W8JI w8ji@contesting.com -- FAQ on WWW: http://www.contesting.com/FAQ/amps Submissions: amps@contest; /archives//html/Amps/2000-07/msg00227.html (9,154 bytes)
14. [AMPS] Caveat on Dentron Filaments + MLA-2500B Notes (score: 1): Author: philk5pc@tyler.net (Phil Clements); Date: Mon, 31 Jul 2000 10:05:16 -0500; Not a problem...Eimac says one minute minimum...my delay tube in my 2500B takes 2 minutes when cold. Thanks, Phil, K5PC -- FAQ on WWW: http://www.contesting.com/FAQ/amps Submissions: amps@contesting; /archives//html/Amps/2000-07/msg00226.html (8,910 bytes)
15. [AMPS] Caveat on Dentron Filaments + MLA-2500B Notes (score: 1): Author: philk5pc@tyler.net (Phil Clements); Date: Mon, 31 Jul 2000 09:49:37 -0500; I'll put the top on and report what I measure...good point. Probably true. It is one of those that are in a gold metal rectangular case. 100 ohms @ 25 watts. Will add a 10 ohm HV glitch resistor, a; /archives//html/Amps/2000-07/msg00225.html (10,414 bytes)
16. [AMPS] Caveat on Dentron Filaments + MLA-2500B Notes (score: 1): Author: k9zm@frontiernet.net (Greg Gobleman); Date: Mon, 31 Jul 2000 06:18:13 -0500; for for the have delay Hi Goose, So RF Parts has finally run out? That's amazing considering what the prices were getting to be. I think you meant to say that the 8875's are identical except for the; /archives//html/Amps/2000-07/msg00220.html (9,648 bytes)
17. [AMPS] Caveat on Dentron Filaments + MLA-2500B Notes (score: 1): Author: W8AV@aol.com (W8AV@aol.com); Date: Mon, 31 Jul 2000 06:55:41 EDT; << I think you can buy new 8875's no problem. All you can afford! Yeah stocks seem to be getting down but priced the way they are, nobody is going to run out soon. Talked to RF Parts about two months; /archives//html/Amps/2000-07/msg00219.html (9,470 bytes)
18. [AMPS] Caveat on Dentron Filaments + MLA-2500B Notes (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Sun, 30 Jul 2000 20:45:25 -0400; Only as coupling capacitors, unless they were in a low-current application. That's true. Any change in temperature and the capacitor will move like crazy in value. 73, Tom W8JI w8ji@contesting.com -; /archives//html/Amps/2000-07/msg00213.html (9,577 bytes)
19. [AMPS] Caveat on Dentron Filaments + MLA-2500B Notes (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Sun, 30 Jul 2000 20:45:25 -0400; Sounds high from what I remember. Was that measured in place, with the top on? The swamping resistors I remember are fairly inductive. They mostly disappear on ten meters, even if they are there. Or; /archives//html/Amps/2000-07/msg00214.html (9,722 bytes)
20. [AMPS] Caveat on Dentron Filaments + MLA-2500B Notes (score: 1): Author: philk5pc@tyler.net (Phil Clements); Date: Sun, 30 Jul 2000 10:18:25 -0500; The coil in the "B" model measures 19 uh...very adequate for a Q of 10-12 on 160m. (1100 ohms plate load) Always a good idea with high-dollar tubes! You don't have to....a 100 ohm swamping resistor; /archives//html/Amps/2000-07/msg00205.html (11,718 bytes)

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