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1. [Amps] 2 x 4cx1500b Tube matching? (score: 1): Author: qrp73@talk21.com (qrp73@talk21.com); Date: Tue, 16 Jul 2002 06:18:52 GMT+01:00; I want a build a dual 4cx1500b amplifier. I managed to obtain a batch of unmatched 4cx1500b's all different date codes. I was wondering which method would be best to achieve matched and balanced tube; /archives//html/Amps/2002-07/msg00212.html (8,441 bytes)
2. [Amps] 2 x 4cx1500b Tube matching? (score: 1): Author: yo9fzs@office.deck.ro (yo9fzs); Date: Tue, 16 Jul 2002 09:26:33 +0300; Hello Greg Even if the the cathode and filament are connected, you may still use cathode R for negative feedback and "equalising" the tube currents, but you have to use chokes for the filaments. Ther; /archives//html/Amps/2002-07/msg00213.html (10,909 bytes)
3. [Amps] 2 x 4cx1500b Tube matching? (score: 1): Author: g8gsq@qsl.net (Steve Thompson); Date: Tue, 16 Jul 2002 07:47:43 +0100; matched tubes. I would also like to DC ground the screen and these boards dont appear to support grid driven DC grounded screen. The SEK board does support grounded screen. Bullet point 4 on the firs; /archives//html/Amps/2002-07/msg00214.html (7,308 bytes)
4. [Amps] 2 x 4cx1500b Tube matching? (score: 1): Author: Ian White, G3SEK" <g3sek@ifwtech.co.uk (Ian White, G3SEK); Date: Tue, 16 Jul 2002 09:39:38 +0100; When I was designing the boards, I looked very carefully at the possibility of dual independent screen and/or grid supplies to handle un-matched tubes... and decided it would be pointless. It is a m; /archives//html/Amps/2002-07/msg00215.html (10,687 bytes)

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