Tube integrated PP KT88 amp with one cathode R per pair of power tubes

Tubes Asylum

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Click below for pics, etc. My Friend Rnolan's been given this amp, and his post at the bottom of that thread below, provides details of the valve complement in his.
Three 5Z3s?
So it's using cathode bias for the KT88s? Yes, or isn't it that simple?
Does my friend Richard need / must he get - a KT88 that matches one of the others in the amp?
OR a matched quad?
I used to believe that matched pairs of EL84s were not required for LEAK Stereo 20s. HJ LEAK wrote this in the owners doc'n. I thought that was due to cathode bias? I do have four matched pairs in the LEAKs.

TIA

Warmest

Tim Bailey

Skeptical Measurer & Audio Scrounger

Chinese? PP KT88 integrated (Open in New Window)

Edits: 08/31/16 08/31/16 08/31/16

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Topic - Tube integrated PP KT88 amp with one cathode R per pair of power tubes - Timbo in Oz 22:02:46 08/31/16 (4)

Cathode (1 R or 2) or Fixed bias, - Chip647 05:23:57 09/01/16 (0)

PP Cathode bias with ONE resistor - implications? TIA - Timbo in Oz 03:00:37 09/01/16 (0)

RE: Tube integrated PP KT88 amp with one cathode R per pair of power tubes - DAK 22:29:26 08/31/16 (1)

RE: Tube integrated PP KT88 amp with one cathode R per pair of power tubes - FenderLover 06:28:59 09/01/16 (0)

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