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

Results:

References: [ +subject:/^(?:^\s*(re|sv|fwd|fw)[\[\]\d]*[:>-]+\s*)*\[AMPS\]\s+Inrush\s+Current\s*$/: 13 ]

Total 13 documents matching your query.

1. [AMPS] Inrush Current (score: 1): Author: w6frmarv@pacbell.net (Marv Gonsior); Date: Tue, 25 Apr 2000 13:28:59 -0700; --==_816203==_.ALT Content-Type: text/plain; charset="us-ascii"; format=flowed Gents: Phil, K5PC, urged limiting heater inrush current on indirectly heated tubes like the 8877. I also believe, despit; /archives//html/Amps/2000-04/msg00144.html (9,083 bytes)
2. SV: [AMPS] Inrush Current (score: 1): Author: sm5ki@algonet.se (sm5ki); Date: Wed, 26 Apr 2000 06:55:41 +0000; detta format, kommer hela eller delar av detta meddelande inte att vara l?sbart. --MS_Mac_OE_3039576941_83854_MIME_Part Content-type: text/plain; charset="US-ASCII" Content-transfer-encoding: quoted; /archives//html/Amps/2000-04/msg00149.html (11,266 bytes)
3. SV: [AMPS] Inrush Current (score: 1): Author: 2@vc.net (measures); Date: Tue, 25 Apr 2000 23:28:28 -0700; As have I. Curiously, in addition to the open heater, the insulation between the heaters and the cathode had broken down. To me, this possibly suggests a B+ to gnd flashover that drove the cathode t; /archives//html/Amps/2000-04/msg00151.html (8,676 bytes)
4. SV: [AMPS] Inrush Current (score: 1): Author: Peter_Chadwick@mitel.com (Peter Chadwick); Date: Wed, 26 Apr 2000 07:58:13 +0100; heater I presume you mean 'ground to RF'. Interestingly enough, back in the dawn of pre-history when the the old Command transmitters were designed, they used a Hartley oscillator at only a few watts; /archives//html/Amps/2000-04/msg00152.html (9,501 bytes)
5. SV: [AMPS] Inrush Current (score: 1): Author: 2@vc.net (measures); Date: Wed, 26 Apr 2000 06:58:47 -0700; I mean that the heater should probably not be DC grounded as long as the possibility of a B+ to ground arc exists. . If such an arc occurs, the internal insulation between cathode and heater can arc; /archives//html/Amps/2000-04/msg00153.html (10,153 bytes)
6. SV: [AMPS] Inrush Current (score: 1): Author: Peter_Chadwick@mitel.com (Peter Chadwick); Date: Wed, 26 Apr 2000 15:08:38 +0100; Do I understand you as advising a bifilar filament choke, and tying one side of the heater and cathode together? That stops the heater cathode insulation getting punctured with a B+ to ground short;; /archives//html/Amps/2000-04/msg00154.html (9,030 bytes)
7. SV: [AMPS] Inrush Current (score: 1): Author: 2@vc.net (measures); Date: Wed, 26 Apr 2000 08:57:54 -0700; Yes Correct Jumper the cathode to the heater and it does not matter if the heater/cathode insulation has gone to hell. The heater draws 10.5a. Radios that will deliver over 10a of RF output are not; /archives//html/Amps/2000-04/msg00155.html (9,450 bytes)
8. SV: [AMPS] Inrush Current (score: 1): Author: Ian White, G3SEK" <g3sek@ifwtech.com (Ian White, G3SEK); Date: Wed, 26 Apr 2000 18:18:12 +0100; An external B+ to ground short in a GG amplifier - the classic case being powering-up with the B+ crowbar switch closed - will not send any current through the cathode at all. The current flows back; /archives//html/Amps/2000-04/msg00157.html (10,342 bytes)
9. SV: [AMPS] Inrush Current (score: 1): Author: 2@vc.net (measures); Date: Wed, 26 Apr 2000 12:51:03 -0700; ? I have not yet powered up with interlock shorting the hv to ground. However, I have had intermittent B+ to gnd arcs, mainly during intermittent vhf parasites. If an amplifier were switched on with; /archives//html/Amps/2000-04/msg00160.html (10,668 bytes)
10. SV: [AMPS] Inrush Current (score: 1): Author: Ian White, G3SEK" <g3sek@ifwtech.com (Ian White, G3SEK); Date: Wed, 26 Apr 2000 22:38:33 +0100; Good point - I should have said, "powering-up and then closing the B+ crowbar switch." - moderated by a surge limiting ("glitch") resistor, all of which is totally within our control. Yes, there are; /archives//html/Amps/2000-04/msg00161.html (9,783 bytes)
11. SV: [AMPS] Inrush Current (score: 1): Author: 2@vc.net (measures); Date: Wed, 26 Apr 2000 20:22:40 -0700; Penetrating the grid seems quite unlikely. cheers, Ian. - Rich..., 805.386.3734, www.vcnet.com/measures. end -- FAQ on WWW: http://www.contesting.com/ampsfaq.html Submissions: amps@contesting.com Ad; /archives//html/Amps/2000-04/msg00165.html (9,808 bytes)
12. SV: [AMPS] Inrush Current (score: 1): Author: Ian White, G3SEK" <g3sek@ifwtech.com (Ian White, G3SEK); Date: Thu, 27 Apr 2000 07:46:24 +0100; Depends what you mean by "penetrating". It doesn't have to blow a physical hole in the grid. What could be happening is that the very local area of the grid where the arc strikes is pulled strongly p; /archives//html/Amps/2000-04/msg00167.html (9,166 bytes)
13. SV: [AMPS] Inrush Current (score: 1): Author: 2@vc.net (measures); Date: Thu, 27 Apr 2000 04:43:33 -0700; The grid is rather well grounded through the Eimac fixture. . I do not see how such a scenario would be possible. None of the current that supplies an anode/grid arc is emitted by the cathode. The c; /archives//html/Amps/2000-04/msg00168.html (9,558 bytes)

Current List: 1 - 13
Page: [1]