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Audio Research VT100 MKIII Tube Replacement

Hello,
I recently bought a second hand VT100 MKIII. I will replace amp's all 12 tubes. 4 pairs are 6550 I already ordered but I am confused about should I replace them with  4 single 6H30 tubes. Should I replace them with 6H30Pi or they have to be identical as 6H30.
Thanks !David.
davidbarac

Showing 1 response by artemus_5

artemus_5's avatar
artemus_5
1,992 posts
 
I’m confused by the question
Are you trying to replace 6550 with 6H30? Or asking if there is a difference between the 6h30 and 6h30pi?

Fwiw all 6h30 tubes are the same.
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