Jolida JD-100 can U use 12AU7 or 12AT7 instead?

Just wondering if anyone knows if either of these tubes can be used instead of the 12AX7 in this circuit.

jig04-26-2005 9:03pm

amandarae Details Discussions Posts This discussion Message User 512 posts 04-26-2005 at 11:46pm Copy Comment URL Report Comment Edit Delete No, absolutely not! You can use an ECC83 or 5751 however.
stevecham Details Discussions Posts This discussion Message User 3,340 posts 04-27-2005 at 03:19am Copy Comment URL Report Comment Edit Delete Ditto Amandarae, you must use the 12AX7, ECC83 or 5751 as only they have the required amount of gain for this circuit.
stevecham Details Discussions Posts This discussion Message User 3,340 posts 04-27-2005 at 03:20am Copy Comment URL Report Comment Edit Delete By the way try a pair of matched Ei (not EH) 12AX7s in this player, they make my JD-100 sound fabulous and I have tried all except Mullards.
jkaway Details Discussions Posts This discussion Message User 93 posts 04-27-2005 at 03:30am Copy Comment URL Report Comment Edit Delete Stevecham is right on the mark re Ei tubes.They also make great 12au7 and at 8 or 9 bucks apiece are a steal.