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1. [AMPS] Re: Bent filaments (score: 1): Author: w8jitom@postoffice.worldnet.att.net (w8jitom@postoffice.worldnet.att.net); Date: Sun, 13 Jul 1997 11:55:20 +0000; To: <amps@contesting.com> I wonder how the VHF current gets so high through VERY large RF choke so as to melt the wire, when full boogie HF drive doesn't melt the wire? This claim seems to be a case; /archives//html/Amps/1997-07/msg00071.html (12,542 bytes)
2. [AMPS] Re: Bent filaments (score: 1): Author: measures@vc.net (Rich Measures); Date: Sun, 13 Jul 97 10:45:17 -0700; To: <amps@contesting.com> Ian said this current is DC. I said it's DC. Who said that the current is VHF, Mr. Rauch? Rich-- R. L. Measures, 805-386-3734, AG6K -- FAQ on WWW: http://www.contesting.com; /archives//html/Amps/1997-07/msg00073.html (8,463 bytes)
3. [AMPS] Re: Bent filaments (score: 1): Author: w8jitom@postoffice.worldnet.att.net (w8jitom@postoffice.worldnet.att.net); Date: Sun, 13 Jul 1997 21:26:07 +0000; To: <amps@contesting.com> Rich, You now claim the VHF current is dc. But in another post you claimed RF heats the grid of an 8877 and boils away the gold, and you claim HUNDREDS of mA of dc can't hu; /archives//html/Amps/1997-07/msg00075.html (10,206 bytes)
4. [AMPS] Re: Bent filaments (score: 1): Author: philk5pc@connect.net (Phil Clements); Date: Mon, 14 Jul 1997 00:16:57 -0500; snip....... snip...... Hi Tom et al..... IMO the source of the current that bends the filaments is the same source that has sent Ip meters sailing out of their holes and across the room. It is the fi; /archives//html/Amps/1997-07/msg00077.html (9,365 bytes)
5. [AMPS] Re: Bent filaments (score: 1): Author: Shawn Tayler" <stayler@powernet.net (Shawn Tayler); Date: Mon, 14 Jul 97 06:52:35; Hi Phil, I'll bite. How is this done? The old Thyratron to ground? de Shawn N7LQ (formerly WB7TDI) DM09dn & DN01fa -- FAQ on WWW: http://www.contesting.com/ampfaq.html Submissions: amps@contesting.co; /archives//html/Amps/1997-07/msg00078.html (8,760 bytes)
6. [AMPS] Re: Bent filaments (score: 1): Author: km1h@juno.com (km1h @ juno.com); Date: Mon, 14 Jul 1997 09:54:44 EDT; On Mon, 14 Jul 1997 00:16:57 -0500 philk5pc@connect.net (Phil Clements) writes: That is where the 10-15 Ohm wirewound in series with the HV line comes into play. In the SB-220, simply remove that sil; /archives//html/Amps/1997-07/msg00082.html (11,661 bytes)
7. [AMPS] Re: Bent filaments (score: 1): Author: w8jitom@postoffice.worldnet.att.net (w8jitom@postoffice.worldnet.att.net); Date: Mon, 14 Jul 1997 11:27:36 +0000; To: <amps@contesting.com> Hi Phil, Thanks for adding some intelligent comments to this subject. I agree totally. The filter capacitor is the source of the energy. Only a resistance is fast enough, a; /archives//html/Amps/1997-07/msg00085.html (11,514 bytes)
8. [AMPS] Re: Bent filaments (score: 1): Author: bkmak@airmail.net (Bob Kmak); Date: Mon, 14 Jul 97 11:38:03 -0500 (CDT); Tom, Are you saying that a string of smaller HV supply capacitors in series is better than a big oil-filled cap, for big-bang protection purposes? I'm new to this stuff, and just trying to figure it; /archives//html/Amps/1997-07/msg00086.html (8,639 bytes)
9. [AMPS] Re: Bent filaments (score: 1): Author: w8jitom@postoffice.worldnet.att.net (w8jitom@postoffice.worldnet.att.net); Date: Mon, 14 Jul 1997 13:12:20 +0000; To: <amps@contesting.com> No sale Carl. When the tube faults the grid flys right up to full anode voltage. The grid just as often as not arcs to the filament in that condition, wiping out all the st; /archives//html/Amps/1997-07/msg00088.html (11,800 bytes)
10. [AMPS] Re: Bent filaments (score: 1): Author: G3SEK@ifwtech.demon.co.uk (Ian White, G3SEK); Date: Mon, 14 Jul 1997 07:39:55 +0100; That certainly has to be true - aided by bad design that fails to limit the maximum surge current, fails to protect the meters with diodes (BIG diodes) and then forgets to turn off the mains supply t; /archives//html/Amps/1997-07/msg00090.html (10,190 bytes)
11. [AMPS] Re: Bent filaments (score: 1): Author: w8jitom@postoffice.worldnet.att.net (w8jitom@postoffice.worldnet.att.net); Date: Mon, 14 Jul 1997 19:40:13 +0000; To: <amps@contesting.com> Hi Bob, Absolutely. The best electrolytics are ones that are just as large as necessary. Overkill in the power supply transformer and rectifiers is a good idea, but one the; /archives//html/Amps/1997-07/msg00095.html (9,878 bytes)
12. [AMPS] Re: Bent filaments (score: 1): Author: measures@vc.net (Rich Measures); Date: Mon, 14 Jul 97 19:45:56 -0700; To: <amps@contesting.com> There is typically no abnormal gas in grid/filament shorted 3-500Zs. Without gas, how could there have been such an arc? Rich-- R. L. Measures, 805-386-3734, AG6K -- FAQ on; /archives//html/Amps/1997-07/msg00096.html (8,844 bytes)
13. [AMPS] Re: Bent filaments (score: 1): Author: measures@vc.net (Rich Measures); Date: Mon, 14 Jul 97 19:45:58 -0700; To: <amps@contesting.com> Agreed. More is not always better. However, a suitable HV glitch resistor is a good idea no matter what type of filter caps are being used. ...or even kiloamperes with spec; /archives//html/Amps/1997-07/msg00097.html (9,280 bytes)
14. [AMPS] Re: Bent filaments (score: 1): Author: bkmak@airmail.net (Bob Kmak); Date: Tue, 15 Jul 97 07:39:00 -0500 (CDT); Tom, Thanks very much for the information. I am gathering together parts to build a plate supply, and was sort of leaning towards a string of electrolytics anyway, due to their availability from plac; /archives//html/Amps/1997-07/msg00099.html (8,499 bytes)
15. [AMPS] Re: Bent filaments (score: 1): Author: w8jitom@postoffice.worldnet.att.net (w8jitom@postoffice.worldnet.att.net); Date: Tue, 15 Jul 1997 13:29:48 +0000; To: <amps@contesting.com> Rich replied: Sorry Rich, I only know English and it doesn't seem to work. I;'ll try one last time. 1.) In "Getters And Their Function in Vacuum Tubes", an arc is listed as; /archives//html/Amps/1997-07/msg00101.html (9,720 bytes)
16. [AMPS] Re: Bent filaments (score: 1): Author: measures@vc.net (Rich Measures); Date: Tue, 15 Jul 97 17:16:25 -0700; To: <amps@contesting.com> Don't take it to heart, Mr. Rauch. There are probably quite a few others who would confuse a "personal director" with a "personnel director". Besides that, you recognized y; /archives//html/Amps/1997-07/msg00104.html (9,182 bytes)

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