- 1. Re: [Amps] Gettering 3-500 Tubes (score: 1)
- Author: rbethman <rbethman@comcast.net>
- Date: Sat, 05 Nov 2011 19:08:13 -0400
- I wouldn't be concerned with "Gettering". *IF* there is air leakage into the tubes, they will show a cloudy gassy look. Go ahead and try them as they are after you've gotten the rest sorted out. *IF*
- /archives//html/Amps/2011-11/msg00008.html (9,163 bytes)
- 2. Re: [Amps] Gettering 3-500 Tubes (score: 1)
- Author: rbethman <rbethman@comcast.net>
- Date: Sun, 06 Nov 2011 11:52:05 -0500
- Yes, a bad tube will still arc over. The biggest issue is arcing over to the filaments. Protect the filament transformer/windings with a large enough wattage resistor, that does NOT significantly red
- /archives//html/Amps/2011-11/msg00013.html (9,813 bytes)
- 3. Re: [Amps] Gettering 3-500 Tubes (score: 1)
- Author: rbethman <rbethman@comcast.net>
- Date: Sun, 06 Nov 2011 12:12:10 -0500
- I agree completely! The only time I've had Eimac tube gas issues, has been with WWII era 250THs and 100THs. The ONLY reason for this to occur is because they are NOT force air cooled! They are ONLY c
- /archives//html/Amps/2011-11/msg00014.html (10,384 bytes)
- 4. Re: [Amps] Gettering 3-500 Tubes (score: 1)
- Author: rbethman <rbethman@comcast.net>
- Date: Sun, 06 Nov 2011 14:21:04 -0500
- I can agree with that. Although I don't usually let the 3-500s sit for more than a couple of years. The ones in my Amp Supply LK-500ZB are the originals. When it was shipped to me in the late '90s, T
- /archives//html/Amps/2011-11/msg00018.html (15,056 bytes)
- 5. Re: [Amps] Gettering 3-500 Tubes (score: 1)
- Author: rbethman <rbethman@comcast.net>
- Date: Sun, 06 Nov 2011 17:15:06 -0500
- Carl brings up some VERY good points! I'm not a fan of all this Harbach mod stuff. Replacing the original diodes with better ones is darn good advice. When I built my SB-201, I replaced the Heath sup
- /archives//html/Amps/2011-11/msg00023.html (9,973 bytes)
- 6. Re: [Amps] Gettering 3-500 Tubes (score: 1)
- Author: rbethman <rbethman@comcast.net>
- Date: Tue, 08 Nov 2011 11:10:50 -0500
- I don't find it a surprise that the Chinese 572Bs are a problem. Too much from China is very problematic. I find the Cetron 572Bs and the old U.S. made 813s to be just fine. If I ever have to replace
- /archives//html/Amps/2011-11/msg00034.html (9,471 bytes)
- 7. Re: [Amps] unsubscribe (score: 1)
- Author: rbethman <rbethman@comcast.net>
- Date: Sat, 19 Nov 2011 15:22:45 -0500
- This would be done by going to: <http://lists.contesting.com/mailman/listinfo/amps > -- +--+ +--+ +--+ +--o00o--°(_)°--o00o--+ _______________________________________________ Amps mailing list Amps@c
- /archives//html/Amps/2011-11/msg00084.html (10,222 bytes)
- 8. Re: [Amps] Is after-powerdown cooling desirable? (score: 1)
- Author: rbethman <rbethman@comcast.net>
- Date: Tue, 20 Dec 2011 12:20:26 -0500
- I run an Amp Supply LK-500ZB. While it isn't a problem, being a VERY well built and designed amplifier, I have used nylon screws and nuts to place a muffin fan over the top of the 3-500Zs. I have it
- /archives//html/Amps/2011-12/msg00160.html (8,883 bytes)
- 9. Re: [Amps] Anti-Corona Paint (score: 1)
- Author: rbethman <rbethman@comcast.net>
- Date: Tue, 27 Dec 2011 11:18:36 -0500
- The referenced 9921 product is a * Semi-conductive coating. Eddy, What are you having problems with? Normally corona is an issue when insulators are coated with crud, salt spray, and the like. This r
- /archives//html/Amps/2011-12/msg00223.html (8,824 bytes)
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