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

Results:

References: [ +subject:/^(?:^\s*(re|sv|fwd|fw)[\[\]\d]*[:>-]+\s*)*\[Amps\]\s+HIGH\s+FILAMENT\s+VOLTAGE\s*$/: 14 ]

Total 14 documents matching your query.

1. Re: [Amps] HIGH FILAMENT VOLTAGE (score: 1): Author: kenneth Johnson <wa6rtp@hotmail.com>; Date: Sat, 10 Dec 2016 23:58:39 +0000; I used # 12 wire total of 24 inches long wound in a two inch coil placed in each filament lead . this droped the voltage on my henry 2k-3 filaments into specifation. your problem is finding enough ro; /archives//html/Amps/2016-12/msg00254.html (7,474 bytes)
2. Re: [Amps] HIGH FILAMENT VOLTAGE (score: 1): Author: Mike Waters <mikewate@gmail.com>; Date: Sat, 10 Dec 2016 18:15:05 -0600; No need to use #12. Smaller wire = more compact. A shorter piece of #16 (or maybe even #18), would do fine. Depends on the current. 73, Mike www.w0btu.com ____________________________________________; /archives//html/Amps/2016-12/msg00257.html (7,863 bytes)
3. Re: [Amps] HIGH FILAMENT VOLTAGE (score: 1): Author: Richard Solomon <dickw1ksz@gmail.com>; Date: Sat, 10 Dec 2016 17:34:11 -0700; You can also use Nichrome wire from an old toaster or such. BUT, before you go through this, make sure the meter you use to measure the Filament Voltage is accurate. Try making the measurement with 2; /archives//html/Amps/2016-12/msg00259.html (8,054 bytes)
4. Re: [Amps] HIGH FILAMENT VOLTAGE (score: 1): Author: <w8hw@comcast.net>; Date: Sat, 10 Dec 2016 19:40:44 -0500; Mike is correct. I have used 27 inch of #18 wire on 3-500 tubes many times and got voltage down to 4.97 volts for each tube. The wire is just one big resistor and gets warm, but works fine. The life; /archives//html/Amps/2016-12/msg00261.html (8,921 bytes)
5. Re: [Amps] HIGH FILAMENT VOLTAGE (score: 1): Author: "Jim Hargrave" <w5ifp@gvtc.com>; Date: Sat, 10 Dec 2016 22:38:25 -0600; You can reduce the voltage with parallel back to back diodes in series with each tube filament. 20 amp/40v diodes are cheap and do not present a mounting challenge. 73, Jim w5ifp@gvtc.com ___________; /archives//html/Amps/2016-12/msg00265.html (9,941 bytes)
6. Re: [Amps] HIGH FILAMENT VOLTAGE (score: 1): Author: Bill Turner <dezrat@outlook.com>; Date: Sun, 11 Dec 2016 05:35:53 +0000; -- ORIGINAL MESSAGE --(may be snipped) REPLY: Yes, but remember those diodes will get hot. I suggest the kind that can be mounted to the chassis. Also, at that current level they may produce hash in; /archives//html/Amps/2016-12/msg00266.html (7,982 bytes)
7. Re: [Amps] HIGH FILAMENT VOLTAGE (score: 1): Author: Vic Rosenthal <k2vco.vic@gmail.com>; Date: Sun, 11 Dec 2016 08:07:05 +0200; And the meter should be specified as measuring "true rms". Vic 4X6GP _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo; /archives//html/Amps/2016-12/msg00267.html (8,207 bytes)
8. Re: [Amps] HIGH FILAMENT VOLTAGE (score: 1): Author: Bryan Swadener via Amps <amps@contesting.com>; Date: Sun, 11 Dec 2016 19:12:09 +0000 (UTC); I suggest NO diodes or resistors in the LV side of the xfmr. A buck transformer in the primary loses or looses [sic] the least power. The secondary needs to handle the amplifier's primary current. A; /archives//html/Amps/2016-12/msg00270.html (8,894 bytes)
9. Re: [Amps] HIGH FILAMENT VOLTAGE (score: 1): Author: RCM <robrk@nidhog.net>; Date: Sun, 11 Dec 2016 14:32:08 -0500; ???????????? Many Amps, Heath SB220, Many Henrys, filament voltage is supplied from a winding on the main transformer. Anything stuck on the primary will effect all voltages. _______________________; /archives//html/Amps/2016-12/msg00271.html (8,099 bytes)
10. Re: [Amps] HIGH FILAMENT VOLTAGE (score: 1): Author: <w8hw@comcast.net>; Date: Sun, 11 Dec 2016 15:07:43 -0500; Caution... Yes you can but... In the case of 3-500 tubes each diode would dissipate 8.5 watts (14 amp * .6v) so for Continues use, you would need 15 watt or better yet 25 watt diodes and that would b; /archives//html/Amps/2016-12/msg00272.html (11,528 bytes)
11. Re: [Amps] HIGH FILAMENT VOLTAGE (score: 1): Author: Bryan Swadener via Amps <amps@contesting.com>; Date: Sun, 11 Dec 2016 21:15:10 +0000 (UTC); Yes; a buck/boost transformer with its secondary wired in series with the OEM transformer needs to have a secondary rated AT LEAST as high as the OEM transformer's primary current requirement. And ye; /archives//html/Amps/2016-12/msg00277.html (9,181 bytes)
12. Re: [Amps] HIGH FILAMENT VOLTAGE (score: 1): Author: "Jim Hargrave" <w5ifp@gvtc.com>; Date: Sun, 11 Dec 2016 16:45:49 -0600; There are several ways to fix this one. I mentioned Diodes because I know it works. It may not be the best solution, but is a simple way to obtain a volt or so drop. A bridge rectifier takes up a sma; /archives//html/Amps/2016-12/msg00282.html (15,384 bytes)
13. Re: [Amps] HIGH FILAMENT VOLTAGE (score: 1): Author: Richard Solomon <dickw1ksz@gmail.com>; Date: Sun, 11 Dec 2016 16:15:46 -0700; And a piece of Nichrome Ribbon/Wire from a broken Toaster is free. 73, Dick, W1KSZ _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/ma; /archives//html/Amps/2016-12/msg00284.html (17,955 bytes)
14. Re: [Amps] HIGH FILAMENT VOLTAGE (score: 1): Author: "Jim W7RY" <jimw7ry@gmail.com>; Date: Sun, 11 Dec 2016 19:23:40 -0600; SB220 filament winding is on a separate transformer. SB200 is the same transformer. 73, Merry Christmas. Jim W7RY/0 I suggest NO diodes or resistors in the LV side of the xfmr. A buck transformer in; /archives//html/Amps/2016-12/msg00290.html (9,788 bytes)

Current List: 1 - 14
Page: [1]