Mail Archive Search: <+subject:/^(?:^\s*(re|sv|fwd|fw)[\[\]\d]*[:>-]+\s*)*\[Amps\]\s+amps\s*$/>

Results:

References: [ +subject:/^(?:^\s*(re|sv|fwd|fw)[\[\]\d]*[:>-]+\s*)*\[Amps\]\s+amps\s*$/: 55 ]

Total 55 documents matching your query.

41. Re: [Amps] AMPS (score: 1): Author: "Joe Subich, W4TV" <w4tv@subich.com>; Date: Fri, 21 Jul 2006 20:24:16 -0400; There is no K-202 on the schematic or parts list of the PA-374, PA-76 or PA-78 amplifiers on the BAMA site. Those are the only amplifiers produced by Alpha to use the 8874. In all three cases the gri; /archives//html/Amps/2006-07/msg00818.html (10,184 bytes)
42. Re: [Amps] AMPS (score: 1): Author: R L Measures <r@somis.org>; Date: Fri, 21 Jul 2006 15:37:14 -0700; K-202 looks like it's a grid shutoff. I was looking at Alpha's diagram. Found it. thanks, Joe. The Q1 is a TIP-147 and is rated at 5A. Q1 appears to carry grid current. Is this true? R L MEASURES, AG; /archives//html/Amps/2006-07/msg00820.html (10,248 bytes)
43. Re: [Amps] AMPS (score: 1): Author: "John Vickers" <wa4tt@nlamerica.com>; Date: Fri, 21 Jul 2006 21:26:23 -0400; Joe answers: I was preparing to order the Herring, someone mentioned earlier, for dinner. But the awful stench of rotting "Mullet" blowing in from the West Coast has me thinking steak and potatoe in; /archives//html/Amps/2006-07/msg00825.html (10,088 bytes)
44. Re: [Amps] AMPS (score: 1): Author: "Joe Subich, W4TV" <w4tv@subich.com>; Date: Fri, 21 Jul 2006 23:59:23 -0400; Rich, where is K-202? Which diagram from Alpha? Rich, the manual clearly states if the grid-current overload occurs by itself the PTT is opened (which applies cutoff bias) since the likely cause is o; /archives//html/Amps/2006-07/msg00834.html (10,176 bytes)
45. Re: [Amps] AMPS (score: 1): Author: R L Measures <r@somis.org>; Date: Fri, 21 Jul 2006 19:08:56 -0700; Thanks. Since grid-current meters typically connect from the cathode / neg-HV to gnd I missed this. Does this circuit stop the flow of grid-current or just open the PTT line?. R L MEASURES, AG6K. 805; /archives//html/Amps/2006-07/msg00836.html (10,626 bytes)
46. Re: [Amps] AMPS (score: 1): Author: "Joe Subich, W4TV" <w4tv@subich.com>; Date: Sat, 22 Jul 2006 02:44:56 -0400; If you would follow the schematic ... (or read the manual at page 5e) you will find it disables the PTT line if grid current is excessive. How odd ... Alpha does the same thing as G3SEK, WD7S, and an; /archives//html/Amps/2006-07/msg00839.html (7,118 bytes)
47. Re: [Amps] AMPS (score: 1): Author: Ian White GM3SEK <gm3sek@ifwtech.co.uk>; Date: Sat, 22 Jul 2006 09:29:22 +0100; Q1 is part of an 'electronic zener' circuit that provides cathode bias. In normal operation it carries cathode current, and also <normal> levels of grid current. The current paths for normal anode an; /archives//html/Amps/2006-07/msg00842.html (10,832 bytes)
48. Re: [Amps] AMPS (score: 1): Author: Ian White GM3SEK <gm3sek@ifwtech.co.uk>; Date: Sat, 22 Jul 2006 10:09:17 +0100; Sorry, my previous posting was an intermediate draft. What I meant to post was this version, so please ignore the previous one. There is nothing technically different below, but I tried to make the e; /archives//html/Amps/2006-07/msg00843.html (13,467 bytes)
49. Re: [Amps] AMPS (score: 1): Author: R L Measures <r@somis.org>; Date: Fri, 21 Jul 2006 22:36:26 -0700; On the 374 Plug In Board CB2 Schematic, to the right of Q203, D213 and Q204. K202 is labeled "Grid" so I assume it has something to do with protecting the grid. "Plug In Board CB2 Schematic" Could th; /archives//html/Amps/2006-07/msg00862.html (10,958 bytes)
50. Re: [Amps] AMPS (score: 1): Author: R L Measures <r@somis.org>; Date: Sat, 22 Jul 2006 06:53:13 -0700; Mr. Subich -- I did not say that there was an Alpha amplifier that used a 50A-rated transistor to protect the grid (of an 8877), I said that due to the 8877's extraordinary emissive capability, one w; /archives//html/Amps/2006-07/msg00864.html (10,478 bytes)
51. Re: [Amps] AMPS (score: 1): Author: R L Measures <r@somis.org>; Date: Sat, 22 Jul 2006 07:39:26 -0700; If the anode potential fell to a very low level during parasitic regeneration, electrons from the 3, 8874s' cathodes would mostly flow into their grids, causing a >18A burst of grid-current which wou; /archives//html/Amps/2006-07/msg00865.html (12,985 bytes)
52. Re: [Amps] AMPS (score: 1): Author: "Joe Subich, W4TV" <w4tv@subich.com>; Date: Sat, 22 Jul 2006 13:06:44 -0400; Anode potential falls to a very low level without corresponding high anode current? Amazing but not possible. The plate current pulse would cause the control board to take the HV off line and quench; /archives//html/Amps/2006-07/msg00880.html (10,058 bytes)
53. Re: [Amps] AMPS (score: 1): Author: R L Measures <r@somis.org>; Date: Sat, 22 Jul 2006 13:40:19 -0700; High anode-I corresponds with low anode-V. Eimac specs the repetitive peak anode current at 6A per tube, and the one shot capability would undoubtedly be a bit more than that. ?? For an 8877 amplifie; /archives//html/Amps/2006-07/msg00926.html (10,657 bytes)
54. [Amps] amps (score: 1): Author: "herzog@frontiernet.net@frontiernet.net" <herzog@frontiernet.net>; Date: Sun, 26 Apr 2009 00:14:09 -0400; re Date: Sat, 25 Apr 2009 22:57:25 -0400 From: "Carl" <km1h@jeremy.mv.com> Subject: Re: [Amps] Fw: High SWR = Baluns actually To: <philc@texascellnet.com>, "'Amps reflector'" <amps@contesting.com> Me; /archives//html/Amps/2009-04/msg00363.html (7,977 bytes)
55. [Amps] amps (score: 1): Author: "Baruch Zilbershatz" <4z4rb@bezeqint.net>; Date: Tue, 5 Oct 2010 05:32:34 +0200; You can look up at my sales page on ebay for solid state amps and drivers. Listed under my call sign 4z4rb You might find what you need as a driver or a stand alone medium power amp. Thanks 4z4rb Bar; /archives//html/Amps/2010-10/msg00019.html (6,587 bytes)

Current List: 41 - 55
Page: [1] [2] [3]