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Cayin A-70t tube rolling ...EL34 Tubes?...

I'm looking to do some tube rolling with my new Cayin A-70t and I'm curious if anyone has any experience doing that. I noticed that there seems to be two models around. One that has a switch to select EL34 or KT88 and one that has the bias pots in place of the switches. I have the one with the bias pots. I'm thinking about trying some SED winged C and some EH 6CA7. What would I set the bias to for use with these tubes. The default is .35-.4
mailman199
5 responses Add your response
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samzx12
1,220 posts
 
Anyone compared the 70T to the 88T?
vinyladdict
164 posts
 
A little late to the party... but I'm running Tung-Sol 6550's in mine with fantastic results. Tung-Sol 12AX7's and the stock 12AU7EH's.
ton1313
272 posts
 
I just put the gold lion KT-77 in my Cayin A50T and I'm quite impressed. They are still breaking in, but have already shown more control over the winged C, that they replaced.
mailman199 OP
34 posts
 
Thanks. I just spoke with Steve and let me first say is is a SUPER nice guy and was very willing to help.

Essentially the bias settings are .30-.40, BUT you need to turn them all the way down before powering up with the new tubes.

Cheers!
geraldm121
63 posts
 
Call Steve at VAS as you have his version of the A-70 he can answer your questions.
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