dynaco st 70 what tubes to replace first

Gentlemen: Esp Dave65mus, Rodman99999,& Viridian
I am so gratefull for the time you have taken to respond.

As a novice in this field of audio I appreciate your knowledge and passion.

I"ve got the new NOS ordered and look forward to Listening but also following your opinions on the threads.

Lawrence

I also own a Will Vincent rebuilt ST-70 wired in triode. I ended up changing all the tubes. RCA 7199's made a positive difference. I tried SED "winged C" el34's and a quad of Siemens el34's. I much prefered the Siemens, winged c's being too rolled of at the top for my taste.

But getting a Mullard fat base gz34 made it sound like a whole new amp. A much better amp. I actually couldn't belive what a positive impact it had on the sound. So if I had a limited budget for tubes, I'd spend my money on a Mullard gz34 first.

If you want the top(price doesn't matter) EL34,go for the Bugle Boy "square D" double getter.It gets along with every EL34 amp I've owned,and heard it in.At $800 and up for a NOS quad,watch out for counterfeits.They will out do all of the above mentioned.

Tommy 583, that is a great description of the sed winged c in my amp also.

IF I had tone controls on my preamp(good gear does not use them so I have none) the winged c's would be like turning the treble adjustment all the way down..... dull and lifeless.

I just put in a new quad of jj kt77's tonight... I had one go out after about 1 year of use and had been using kt66 gold lions since.... now with the vintage mullard gz34, rca blackplate 7199's, and jj kt77's, No more tube rolling for me! I am going to stock up on jj's and rca blackplates and enjoy the music!

Dav 65,

Have you ever tried the gold Lion KT-77's? I was thinking about trying quad of them when funds allow.