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

artg Details Discussions Posts This discussion Message User 362 posts 04-18-2005 at 01:18pm Copy Comment URL Report Comment Edit Delete weird. never had this happen, but those tubes cant be bad. do you have a swap tube to try in its place - justy to see if it goes away? Otherwise, you should call emmanuel
Post removed Aug 12, 2015
drubin Details Discussions Posts This discussion Message User 3,274 posts 04-18-2005 at 02:46pm Copy Comment URL Report Comment Edit Delete I'm having the exact same problerm with a new pair of EH6922's. Sometimes tubes go bad well before their time, I guess. Maddening. I'm almost certain it can't be the OA2, which is not in the signal path and thus can't create the kind of distortion you (we) are hearing.
oldpet Details Discussions Posts This discussion Message User 295 posts 04-18-2005 at 04:37pm Copy Comment URL Report Comment Edit Delete Thanks Drubin I guess I'll switch the stock tubes, with other tubes I've been collecting, to see if the distortion stops. Good point, about the OA2 not being in the signal path. Please post again with what happens in your FS. Thanks Paul
artg Details Discussions Posts This discussion Message User 362 posts 04-21-2005 at 12:21am Copy Comment URL Report Comment Edit Delete well, well, well, here's a gem for the taking.... http://cls.audiogon.com/cgi-bin/cls.pl?preatube&1118799988