Whilst this thread was started by 'arnies' to evaluate 12BH7 tubes, may I take this slightly more off thread? (in view of the fact that nothing has been added since 2013 I can't believe this should prove a problem?)
Recent posts have discussed the possible upgrade of tubes for VTL Amps-not just in respect of the 12BH7 tube.
Now, interestingly I bought a VTL Amp just over a year ago. At the time I contacted VTL ( and the UK Distributor -Kog Audio) with regard to possible tube upgrades.Both were dismissive of the idea !!
I didn't take it any further at the time but I'm now having to consider replacement tubes. ( which is how I can to this thread)
So,you lads who have VTL amps, what's the recommendation ??
That is, for the 12BH7,12AT7 and the KT88?