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1. [Amps] AL-80B "Optional" Grid Protection circuitry - identify? (score: 1): Author: Charlie <ad5th@direcway.com>; Date: Mon, 17 Jan 2005 18:48:38 -0600; The AL-80B manual and web site discuss an "optional' grid protection board I believe they call it. I am the new owner of a used AL-80B and would like to know how I can check if this "optional ' grid; /archives//html/Amps/2005-01/msg00330.html (7,060 bytes)
2. Re: [Amps] AL-80B "Optional" Grid Protection circuitry - identify? (score: 1): Author: "Gary Smith" <wa6fgi@sbcglobal.net>; Date: Mon, 17 Jan 2005 20:00:34 -0800; Were you overdriving the amp? You can use the amp without the alc hooked up, but you do have to watch the power input level. My suggestion is to tune with a low input power level then raise the drive; /archives//html/Amps/2005-01/msg00332.html (8,844 bytes)
3. Re: [Amps] AL-80B "Optional" Grid Protection circuitry - identify? (score: 1): Author: R.Measures <r@somis.org>; Date: Tue, 18 Jan 2005 01:25:07 -0800; The only grid protection that seems to protect a 3-500Z reliably is a fusable element --such as a 0.5A, 3AG fuse or a 20 - 39 ohm 1/4 or 1/2 watt carbon-film R. While transistor-type protection circu; /archives//html/Amps/2005-01/msg00337.html (8,458 bytes)

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