when I switched to my EMT chain I thought I was prepared reducing a little noise of the EMT 139a phono pre. You may only hear a very light breeze between the different music songs in the pause between the songs.I tried some Nos matched tubes I had bought for this improvement – but failed.
All units in this chain work pretty efficiently, the EMT R 80, Ortofon arm and A 90 cart, the Western Electric 618B, the EMT139a phono pre and at least the EMT JPA in the MM function.
So what am I doing? Believing one of my technical advisors that one should select 100 tubes using only the matched 8 ones for the two Mono EMT 139a?
I was pretty in dispair of quite a difficult way ahead of me. In the end I precisely built it back to my old matched tubes and took care that the tubes stood firm in their sockets.
When connected to the chain and the WAVAC amps I suddenly realized that the breeze was nearly gone. Wow! Maybe the two 139a units needed a special treatment or just a good stand for the tubes after having driven 20 km with the set from my technican who implemented these fabulous boxes…