Quicksilver Mid Mono Tube Rolling

Also , there are several build revisions of the amp..... the older ones without dual bias pots for each tube can not use KT90 or KT120  like the later ones can.  So be aware of that....   aside from that any EL34 or 6L6 will work for the outputs, but these amps were voiced for the EL34 tube.  

Great amps you have acquired!!!     I have had great luck with both Gold Lion KT 88 and KT 66 but am currently running JJ EL34 which I like a lot.   I re tuned about six months ago with all JJ and the amp sounded fantastic but the input tubes got noisy so I put the EH I had been using and it still sounds pretty damn good.   When funds allow and when those tubes get tired I am going to do Gold Lions for the input and driver tubes.  I use them in other equipment and they seem to last forever and in my experience sound better than any other new production tube for their type.  Do that and you will save yourself so e headaches.  I like to try different tubes but the problem with constant tube rolling is that it loosens the spring tension inside the tube socket.  So I try to avoid that by using the best current tubes that I know sound good.   

I have had a Gold Lion in my conrad Johnson pre for about 4 years... it ate lesser 6922 in about 6 months because it runs them hard...  Gold Lion 6922 is the only tube that has lasted and has also been dead quiet .

Make sure you turn the bias fully counter clockwise before turning the amps back on if you change the output tubes.    Then after it warms up a minute or two slowly adj bias and check 15 minutes after that and then a few times during the first hour or so to make sure bias is stable....   

I can't say enough good things about Quicksilver.   I bout my amps used about six years ago, they were about a year old and have been rock solid.    Had a few bad tubes, blew a fuse a few times but never a hard failure.

I just bought the Quicksilver Headphone amp and it is built exactly like the Mids....   like a tank.      

The Mid Monos are worth every bit new and are a steal used.... enjoy

I have found that the driver tubes make little difference.    Mike of QS said the input tube makes the bigger difference of the two.  I have a pair of 6n23p Reflector in there and they seem to last forever in that position.  

I am going to sound like a hippocrate about tube rolling, but I put a JJ Ecc88 in my pre and JJ  ECC803s in each Mid mono and the combination sounds phenomenal with the JJ EL 34.  I must have had a dirty socket or pins, I had noise last time I tried the 803s