Mail Archive Search: <+subject:/^(?:^\s*(re|sv|fwd|fw)[\[\]\d]*[:>-]+\s*)*\[AMPS\]\s+3CX300A1\s+for\s+AB1\s+GG\s*$/>

Results:

References: [ +subject:/^(?:^\s*(re|sv|fwd|fw)[\[\]\d]*[:>-]+\s*)*\[AMPS\]\s+3CX300A1\s+for\s+AB1\s+GG\s*$/: 12 ]

Total 12 documents matching your query.

1. [AMPS] 3CX300A1 for AB1 GG (score: 1): Author: ohashi@ny.airnet.ne.jp (ohashi); Date: Tue, 27 Jul 1999 21:11:20 +0900; Greetings from Japan!! I have an MLA-2500B working well, however worry about degradation of the tubes of 8875, wonder triode. It's difficult to find spare tubes now. I am considering conversion to us; /archives//html/Amps/1999-07/msg00516.html (8,512 bytes)
2. [AMPS] 3CX300A1 for AB1 GG (score: 1): Author: ohashi@ny.airnet.ne.jp (ohashi); Date: Tue, 27 Jul 1999 23:12:04 +0900; Tnx for prompt res. Yes, I know these two articles, but I like GG amp instead of GC. '73 de JA2DHC/1 Kazuo Ohashi QTH: Fujisawa, Kanagawa, Japan PBBS: JA2DHC@JL1ZND.11.JNET1.JPN.AS WebPage: http://ww; /archives//html/Amps/1999-07/msg00519.html (8,309 bytes)
3. [AMPS] 3CX300A1 for AB1 GG (score: 1): Author: Peter_Chadwick@mitel.com (Peter Chadwick); Date: Tue, 27 Jul 1999 15:20:44 +0100; With that tube in GG, you will have to be very careful about keeping it in AB1; it has very little grid dissipation capability, so you will need a grid trip. I would not rely on ALC to protect the tu; /archives//html/Amps/1999-07/msg00520.html (8,014 bytes)
4. [AMPS] 3CX300A1 for AB1 GG (score: 1): Author: ohashi@ny.airnet.ne.jp (ohashi); Date: Tue, 27 Jul 1999 23:36:21 +0900; I think high impedance bias circuit (about 1-5Kohm) can secure from over drive of G1, as positive region swing generates more bias voltage. '73 de JA2DHC/1 Kazuo Ohashi QTH: Fujisawa, Kanagawa, Japan; /archives//html/Amps/1999-07/msg00521.html (8,381 bytes)
5. [AMPS] 3CX300A1 for AB1 GG (score: 1): Author: Peter_Chadwick@mitel.com (Peter Chadwick); Date: Tue, 27 Jul 1999 15:41:11 +0100; And unacceptable splatter! Also there will be grid dissipation - and you won't need very much to ruin the tube - it only is rated for 1 watt of grid disipation. If you have grid current, the tube is; /archives//html/Amps/1999-07/msg00522.html (8,212 bytes)
6. [AMPS] 3CX300A1 for AB1 GG (score: 1): Author: ohashi@ny.airnet.ne.jp (ohashi); Date: Wed, 28 Jul 1999 00:21:55 +0900; Very quick response !! You are right if no ALC is used. My idea assumes 1-10 mA grid current (yes, it is little bit AB2), but ALC reduces driving power from the excitor, resulting total IMD is not so; /archives//html/Amps/1999-07/msg00526.html (8,472 bytes)
7. [AMPS] 3CX300A1 for AB1 GG (score: 1): Author: measures@vc.net (Rich Measures); Date: Tue, 27 Jul 1999 08:55:08 -0700; ? A triode that is designed for Class AB1 has a Mu of c. 4. A Mu of at least 100 is needed for GG service. - cheers, Peter. Rich... R. L. Measures, 805-386-3734, AG6K, www.vcnet.com/measures -- FAQ; /archives//html/Amps/1999-07/msg00534.html (8,181 bytes)
8. [AMPS] 3CX300A1 for AB1 GG (score: 1): Author: measures@vc.net (Rich Measures); Date: Tue, 27 Jul 1999 08:55:12 -0700; ? not same thing. 6146Bs have a screen to shield the grid from the anode. - cheers, Kazuo Rich... R. L. Measures, 805-386-3734, AG6K, www.vcnet.com/measures -- FAQ on WWW: http://www.contesting.com/; /archives//html/Amps/1999-07/msg00535.html (8,471 bytes)
9. [AMPS] 3CX300A1 for AB1 GG (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Tue, 27 Jul 1999 16:49:15 -0400; First, ALC is not that fast. Most rigs can't even keep up with themselves, let alone a loop from an external PA. Second, any grid current will perturb grid voltage unless the grid comes from a suppl; /archives//html/Amps/1999-07/msg00544.html (8,355 bytes)
10. [AMPS] 3CX300A1 for AB1 GG (score: 1): Author: measures@vc.net (Rich Measures); Date: Tue, 27 Jul 1999 15:22:41 -0700; ? What is the Mu of the tube, Tom. Rich... R. L. Measures, 805-386-3734, AG6K, www.vcnet.com/measures -- FAQ on WWW: http://www.contesting.com/ampfaq.html Submissions: amps@contesting.com Administra; /archives//html/Amps/1999-07/msg00547.html (9,055 bytes)
11. [AMPS] 3CX300A1 for AB1 GG (score: 1): Author: Peter_Chadwick@mitel.com (Peter Chadwick); Date: Wed, 28 Jul 1999 09:19:56 +0100; The data sheet doesn't give it. It does give ra and gm, from which I work out mu = 9. I'll stick my neck out now: This is a very bad choice of tube for RF GG service. It is rated as an audio tube;it; /archives//html/Amps/1999-07/msg00552.html (11,307 bytes)
12. [AMPS] 3CX300A1 for AB1 GG (score: 1): Author: measures@vc.net (Rich Measures); Date: Wed, 28 Jul 1999 07:11:45 -0700; You can't get an AB1 triode to turn on hard at zero grid-volts unless it has a Mu of more than 4 or so. AB1 triodes are problematic at frequencies over a few hundred kHz. - later, Peter Rich... R. L; /archives//html/Amps/1999-07/msg00558.html (12,423 bytes)

Current List: 1 - 12
Page: [1]