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1. [Amps] FW: High filament current on the 8877 amplifier tube (score: 1): Author: <maflukey@gmail.com>; Date: Mon, 9 Oct 2023 15:20:45 -0500; I have nothing to offer about the excessive current draw, but I have read a lot of warnings NOT to apply plate voltage to an 8877 until the cathode comes up to full temperature to avoid damaging the; /archives//html/Amps/2023-10/msg00023.html (9,737 bytes)
2. Re: [Amps] FW: High filament current on the 8877 amplifier tube (score: 1): Author: MU 4CX250B <4cx250b@miamioh.edu>; Date: Mon, 9 Oct 2023 22:36:50 +0000; Matt, I believe the W8JI precautions you cited are only half correct. Yes, it is important never to draw cathode current from a tube with an underheated filament or cathode. However, it is fine to ap; /archives//html/Amps/2023-10/msg00024.html (11,700 bytes)

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