tube upgrade for first sound

Has anyone been able to improve on the stock tubes in the First Sound preamps? I was thinking about trying the Russian 6H23. Any thoughts? thanks

84audio12-22-2003 3:27am

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artg Details Discussions Posts This discussion Message User 362 posts 05-13-2005 at 01:26am Copy Comment URL Report Comment Edit Delete ditto what tvad said - I also had the white label PQ's 6922's and they were fabulous in the FS - and at a "reasonable" price to boot!
oldpet Details Discussions Posts This discussion Message User 295 posts 05-13-2005 at 01:46am Copy Comment URL Report Comment Edit Delete Hello men, :-) I have collected a few NOS tubes already: 7308 PQ /white/US, and a Holland pair. 6922 USN-CEP. 6922 PQ/white/US. Pinched waists? Don't think so. I'm not gonna spend $500 for a pair of tubes, just on sheer principle. :-) So I'm set with NOS tubes. I just wanted to try some current production tubes. As the price of NOS climbs, I thought, current production is at least worth a shot. The EH tubes didn't work at all in the FS. Nothing lost, except for a couple of dollars to send them back. Ei Elites, is another story though. They work. And for $9.00 per tube, you might be surprised. ;-) Thanks for the words of wisdom men. It is appreciated. :-) p
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drubin Details Discussions Posts This discussion Message User 3,285 posts 05-13-2005 at 02:49pm Copy Comment URL Report Comment Edit Delete I've also gone through two sets of the EH tubes. But I want to know why they are not working.