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replacing tubes on amp.

Augoners,
hi guys,i need some advice on changing tubes. sine my BAT amp have 4 pairs of power tubes and 8 pairs of the little 6sn7.. the question is..it is hard to find 8 pairs of 6sn7 of the same kind in the used market..do i need to keep the same brand on all of the tubes? and can i switch 1 or 2 pairs at a time or do i have to switch everything at once?.would it improve the sound if i replace only 1 pair of tube at a time?thanks
ttrhp

Showing 1 response by sugarbrie

sugarbrie
3,854 posts
 
Albert's advice is a good safe bet for very good performance.

There are other audiophiles though that do get good results mix and matching different 6sn7 tubes; if you want to take the time to do a lot of "tube rolling". The "mixed" crowd believe using all the same tube seems to accentuate the particular tube's weaknesses.

A popular alternative is to use the older VT231/6SN7s as the voltage amplifiers, and the 6SN7-GTA/GTB as driver tubes. They feel they are playing on the strengths of both types.

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