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by guitarspaz
Mon Feb 01, 2010 11:51 pm
Forum: Technical Discussion
Topic: Do I need to change my Cathode Resistors? Class A content...
Replies: 8
Views: 2989

Do I need to change my Cathode Resistors? Class A content...

Here's the deal, I just picked up a used Trace Elliot Speed Twin C30 30 watt Class A combo amp. The amp uses 5 12AX7s and 4 El84s. I re-tubed with JJs across the board and it sounds GREAT. This amp is Cathode Biased and has no bias adjustment. The manual specifically says drop in a matched QUAD of E...