Posted March 7, 200619 yr I want to fit better quality tubes to a TU-600, do I need to re-set the bias/plate voltages or are the pre-amp tubes auto-biasing? if so where to I tweek the levels and where to I measure. thanks.
March 9, 200619 yr Author Anyone, surely someone must know if I can just swap the tubes and go or do I need to tweek and voltages?
March 14, 200619 yr Author Still no response I changed the tubes anyway. Its now running a pair of JJ Tesla ECC83s tubes and sounding much the better for it tonality and staging are a definitel improvement of the Sovtek 12AX7LPs fitted as standard.I'd still be interested to know if I can set the plate voltage / bias by the variable resistors on the board for this amp.
March 14, 200619 yr Admin Still no response I changed the tubes anyway. Its now running a pair of JJ Tesla ECC83s tubes and sounding much the better for it tonality and staging are a definitel improvement of the Sovtek 12AX7LPs fitted as standard.I'd still be interested to know if I can set the plate voltage / bias by the variable resistors on the board for this amp.PM jimJ on here, he is our resident tube expert
March 17, 200619 yr Still no response I changed the tubes anyway. Its now running a pair of JJ Tesla ECC83s tubes and sounding much the better for it tonality and staging are a definitel improvement of the Sovtek 12AX7LPs fitted as standard.I'd still be interested to know if I can set the plate voltage / bias by the variable resistors on the board for this amp.<{POST_SNAPBACK}>Will the JJ's filaments take the beating a vehicle driven on the road will recieve? The Sovteks will, and why they are used AFAIK. If not for daily driving and the abuse a vehicle takes, ANY, within reason, would suffice. IMO.Good luck.
March 17, 200619 yr ^^^ good point... cuz some home tubes arent meant to be jumbled around and such in a home environment?
March 17, 200619 yr Exactly.....paper thin filaments. (Also why ppl say they will break in a car i suspect.....as they know how fragile the HT's sometimes are.)
April 27, 200619 yr Author Well, they have been in for over a month now and still sounding great. they seem up to the job.
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.