Replacing Tubes in a TU-600

[Puggie 0]

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.

[Puggie 0]

Anyone, surely someone must know if I can just swap the tubes and go or do I need to tweek and voltages?

[Aaron Clinton 2,372]

JR might be your best bet, and he only checks in every few days

[Puggie 0]

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.

[Aaron Clinton 2,372]

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

[Renegadesrun 0]

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.

[flakko 1]

^^^ good point... cuz some home tubes arent meant to be jumbled around and such in a home environment?

[Renegadesrun 0]

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.)

[Puggie 0]

Well, they have been in for over a month now and still sounding great. they seem up to the job.