- 1. [Amps] Re GS-35B hours.. (score: 1)
- Author: Robert Briggs <vk3zl@bigpond.com>
- Date: Sat, 19 Dec 2009 14:04:41 +1100
- G'day all....I note the comment that 500 hours is probably the useful life for the GS-35B....I have two amplifiers which are turned on and run daily.I use CW only, 160 meters..My original 35B amplifi
- /archives//html/Amps/2009-12/msg00472.html (7,884 bytes)
- 2. Re: [Amps] Re GS-35B hours.. (score: 1)
- Author: Doug Renwick <ve5ra@sasktel.net>
- Date: Fri, 18 Dec 2009 21:50:24 -0600
- And the max. legal output in VK is ... Ah what does it matter. Doug I'll run the race and I will never be the same again. G'day all....I note the comment that 500 hours is probably the useful life fo
- /archives//html/Amps/2009-12/msg00475.html (8,107 bytes)
- 3. Re: [Amps] Re GS-35B hours.. (score: 1)
- Author: Jack Parker <vhfplus@gmail.com>
- Date: Sat, 19 Dec 2009 08:20:08 -0800
- One thing that users of external anode power tubes might consider is filament voltage. My experience in commercial FM broadcast rigs is that running a PA tube at it's rated filament voltage from day
- /archives//html/Amps/2009-12/msg00494.html (9,593 bytes)
- 4. Re: [Amps] Re GS-35B hours.. (score: 1)
- Author: "David H Craig" <davidhcraig@verizon.net>
- Date: Sat, 19 Dec 2009 21:47:58 -0500
- I concur with this 100%. Each of my GS35bs had a variable transformer on the primary side of the filament transformer and it has a profound effect on performance. I use test-points on my Fluke to det
- /archives//html/Amps/2009-12/msg00501.html (12,372 bytes)
- 5. Re: [Amps] Re GS-35B hours.. (score: 1)
- Author: Ron Youvan <ka4inm@tampabay.rr.com>
- Date: Sun, 20 Dec 2009 02:56:00 +0000
- Filament power management. Good for indirectly heated cathodes. -- Ron KA4INM - Of what you see in books, believe 75%. Of newspapers, believe 50%. And of TV news, believe 25% -- make that 5% if the
- /archives//html/Amps/2009-12/msg00503.html (8,017 bytes)
- 6. Re: [Amps] Re GS-35B hours.. (score: 1)
- Author: "Bill, W6WRT" <dezrat1242@yahoo.com>
- Date: Sun, 20 Dec 2009 08:13:02 -0800
- ORIGINAL MESSAGE: REPLY: Later on in the tube's life, did you have to increase the heater voltage, or just leave it constant for the entire lifetime? 73, Bill W6WRT __________________________________
- /archives//html/Amps/2009-12/msg00512.html (7,917 bytes)
- 7. Re: [Amps] Re GS-35B hours.. (score: 1)
- Author: Jack Parker <vhfplus@gmail.com>
- Date: Sun, 20 Dec 2009 19:28:48 -0800
- Yes, the voltage did have to be increased to maintain power output nearing the end of tube life. Not too many hours left at that point but a good indicator to get another tube ready. Better than a su
- /archives//html/Amps/2009-12/msg00516.html (9,057 bytes)
- 8. Re: [Amps] Re GS-35B hours.. (score: 1)
- Author: "Carl" <km1h@jeremy.mv.com>
- Date: Sun, 20 Dec 2009 22:51:24 -0500
- It works well on filament tubes also. Carl KM1H _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps
- /archives//html/Amps/2009-12/msg00517.html (9,033 bytes)
- 9. Re: [Amps] Re GS-35B hours.. (score: 1)
- Author: "Jeff Blaine AC0C" <keepwalking188@yahoo.com>
- Date: Sun, 20 Dec 2009 23:00:42 -0600
- I think in the Eimac white paper covering the reduced filament voltage, they talk about the benefit being applicable to tubes with a certain ratio of filament power to output power. Forget what that
- /archives//html/Amps/2009-12/msg00519.html (9,331 bytes)
- 10. Re: [Amps] Re GS-35B hours.. (score: 1)
- Author: "pc5m, Carel" <pc5m@xs4all.nl>
- Date: Mon, 21 Dec 2009 09:12:33 +0100
- I think a small linear or even a switch mode power supply (however, be aware of the switching freq. noise) for the heather will do the job easily. No fiddling around with variacs, perfect control and
- /archives//html/Amps/2009-12/msg00520.html (13,421 bytes)
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