Hi James,
Glad you got to the bottom of the problem.
If it’s a PS-100 I’d expect you want a matched pair of 6550 or KT88. Any brand is fine, just replace and play, no need to re-bias.
Regards
Dan
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Hi James,
Glad you got to the bottom of the problem.
If it’s a PS-100 I’d expect you want a matched pair of 6550 or KT88. Any brand is fine, just replace and play, no need to re-bias.
Regards
Dan