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

Results:

References: [ +subject:/^(?:^\s*(re|sv|fwd|fw)[\[\]\d]*[:>-]+\s*)*\[AMPS\]\s+Emission\s+from\s+Thoria\s+Filaments\s*$/: 12 ]

Total 12 documents matching your query.

1. [AMPS] Emission from Thoria Filaments (score: 1): Author: w3am@juno.com (w3am@juno.com); Date: Thu, 30 Apr 1998 23:02:36 -0700; Hey, John: I was also taught, as you describe, that the amount of recarburization is limited by the brittleness of the resultant element. In small, closely spaced tubes, you can rezap them beyond the; /archives//html/Amps/1998-05/msg00004.html (9,937 bytes)
2. [AMPS] Emission from Thoria Filaments (score: 1): Author: km1h@juno.com (km1h@juno.com); Date: Mon, 04 May 1998 19:53:35 EDT; I had heard that the quality way to rebuild a tube included a new filament and grid structure and was about 50-75% the cost of a new tube. The less than reputable rebuilders used the acetylene method; /archives//html/Amps/1998-05/msg00032.html (9,596 bytes)
3. [AMPS] Emission from Thoria Filaments (score: 1): Author: measures@vc.net (Rich Measures); Date: Mon, 4 May 98 19:36:10 -0800; What is the name of a rebuilder who replaces the filament every time a tube is rebuilt, and does not use acetylene? Filaments are not carburized when they are made. Even if the filament were replace; /archives//html/Amps/1998-05/msg00039.html (9,575 bytes)
4. [AMPS] Emission from Thoria Filaments (score: 1): Author: km1h@juno.com (km1h@juno.com); Date: Tue, 05 May 1998 20:17:06 EDT; None that I know of. The point I was trying to make is that some reportedly just do the acetylene bit and call it a rebuild. Tom Bruckner and several of the QRO CB and 75M crowd. Comments heard on th; /archives//html/Amps/1998-05/msg00055.html (9,144 bytes)
5. [AMPS] Emission from Thoria Filaments (score: 1): Author: pcmeas@hotmail.com (Arlen Mendelssohn); Date: Wed, 06 May 1998 02:13:25 PDT; 00:29:32)); Mon, 04 May 1998 22:36:50 -0400 (EDT) To: <amps@contesting.com> writes: tungsten/1.5%-thorium byproduct. new ______________________________________________________ Get Your Private, Free; /archives//html/Amps/1998-05/msg00064.html (11,679 bytes)
6. [AMPS] Emission from Thoria Filaments (score: 1): Author: pcmeas@hotmail.com (Arlen Mendelssohn); Date: Wed, 06 May 1998 02:15:17 PDT; I find it rather interesting that Eimac's website, in its discussion of remanufactured tubes, notes that they replace filaments only when they cannot be re-used, and when they can be re-used, Eimac; /archives//html/Amps/1998-05/msg00065.html (8,075 bytes)
7. [AMPS] Emission from Thoria Filaments (score: 1): Author: measures@vc.net (Rich Measures); Date: Wed, 6 May 98 07:40:32 -0800; Carburization makes a 98.5%-tungsten/1.5%-thorium filament considerably more frangible. Does it make sense that the filament would be carburized before it is assembled into the tube? Maybe Eimac fee; /archives//html/Amps/1998-05/msg00071.html (8,902 bytes)
8. [AMPS] Emission from Thoria Filaments (score: 1): Author: KF0FX@aol.com (KF0FX); Date: Wed, 29 Apr 1998 21:15:41 EDT; There was a comment a while back about emission from a tungsten-thoria filament being the result of carburization. I had been under the impression that the thorium was used to enhance emission. And t; /archives//html/Amps/1998-04/msg00338.html (7,702 bytes)
9. [AMPS] Emission from Thoria Filaments (score: 1): Author: measures@vc.net (Rich Measures); Date: Thu, 30 Apr 98 00:15:50 -0800; carburized. As it was explained to me, when Econco Broadcast Services (916-662-4495) rebuilds a thoriated-tungsten filament tube, No thorium is used to restore emission -- no matter how many times t; /archives//html/Amps/1998-04/msg00339.html (9,194 bytes)
10. [AMPS] Emission from Thoria Filaments (score: 1): Author: KF0FX@aol.com (KF0FX); Date: Thu, 30 Apr 1998 08:25:35 EDT; << - - How does one determine how much tungsten carbide has been formed?: . Tungsten is a better electrical conductor than tungsten-carbide, so one can tell how thick the tungsten-carbide layer is by; /archives//html/Amps/1998-04/msg00347.html (7,885 bytes)
11. [AMPS] Emission from Thoria Filaments (score: 1): Author: measures@vc.net (Rich Measures); Date: Thu, 30 Apr 98 07:57:00 -0800; As I understand it, a digital instrument is used to measure the filament current. Based on what I know about the recarburization process, Eimac's thorium-explanation does not wash. yes, Chris www.vc; /archives//html/Amps/1998-04/msg00349.html (8,367 bytes)
12. [AMPS] Emission from Thoria Filaments (score: 1): Author: jtml@lanl.gov (John Lyles); Date: Thu, 30 Apr 1998 13:20:58 -0600; I witnessed the recarb process on a big tube recently. It was essentially as AG6K described it. The gas used and the exact technique are sort of proprietary for each company but it was certainly an a; /archives//html/Amps/1998-04/msg00353.html (7,787 bytes)

Current List: 1 - 12
Page: [1]