What tubes for ST-70

Oops i stated above that the GZ-34 i bought was an RCA. It is a GE branded tube.

Thanks for the link Rodman, he has alot to choose from. I just ordered a quad of the winged c Svetlana el34's. I'll post once they arrive and i have a chance to listen to them. Thanks guys.

I got a pair of RCA 7199's from my local dealer yesterday. All i can say is WOW. It's like a whole new amp. Alot more detail, but still sounds smooth. Now i really can't wait for the new EL-34's to arrive.

Thanks for your input guys. The amp came with a JJ Tesla GZ34, i just picked up an RCA GZ34 from a guy that lives near me. He also has a few Mullards i could get, but i didn't have the money on me when i stopped by. That being said, the RCA does sound better to me. The amp also has an IEC inlet, so i'm using a Signal Cable magic power cord. The 7199's it came with say Tung-Sol on them. The power tubes don't have any markings on them at all. I'm not even sure if they are EL34's or KT77's. My local tube guy doesn't have any 34's or 77's to try before i buy. So what ever i choose i'll have to get them off the net. I just want to make sure i don't make a mistake that i'll be stuck with for a while.

Tommy

Ok i put in a quad of the Svetlana EL-34 winged C, RCA 7199's and a GE GZ-34. The sound is alot smoother overall. I do think i lost a little bass when i installed the EL-34's. This leads me to belive the old tubes were KT-77's. The soundstage is a little wider and higher. The top end is more layed back and not harsh at all. I think i'm going to get the Mullard GZ-34 and see if that makes a differance. Over all i'm pretty happy with the sound, just looking for that last little bit.

I've seen some good things about the remake of the Gold Lion KT-77's. I may try a quad of those next. I've seen them priced around $180-$200 a matched quad. I wonder if they are worth it though?

Well guys my tube rolling is done for now. In the end i settled on a pair of RCA 7199's, a quad of winged "C"' el34's and a Mullard fat base gz34. While the 7199 and el34 tubes were an improvement over the tubes i had to start with, the gz34 brought the amp up to a new level.
I could not belive the improvement i heard after i installed this tube. The bass is much more full, the treble very smooth and the mids are to die for. I'm just glad my local dealer doesn't charge the crazy prices i see on the net for these tubes. But in truth if i spent $150 for this level of improvement i wouldn't be disapointed.

Well Rodman, you were right thanks for your advice. About the caps, this is not a stock st70. It has been rebuilt from the ground up. The only thing that is original on it is the transformers. From what i can see from the top there are solen caps in the 7199 board. I will have to open it up to see the rest of the components that are in there. But for now it sounds so good i don't want to waste any time on taking it apart. I'll just listen for a while. :)