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RE: Try some 12AY7's.

24.220.159.71

In Reply to: RE: Try some 12AY7's. posted by gradEHoser on November 02, 2014 at 13:21:32

The worst that could happen is that you wouldn't like the sound (I doubt it, though).

I can say that with confidence, because I just looked over the data sheets. 12.6v @ .15a series/ 6.3v @ .3a heaters on both, same pinout of course, and all other important aspects close. The 12AT7 can take a higher plate voltage, but your CD output stage won't be running them that hot. Now, I wouldn't swap them for 12AX7's (although guitar guys do it all the time).

I've tried all kinds of 12AT7's, including the really nice ones, and the 'AY's are the ones that stayed. My application is for the first gain stage of an integrated amp, so of course YMMV.

I do have an extra pair here, I could send them to you if you'd like to try them out.

Cory

Follow Ups:

RE: Try some 12AY7's. - gradEHoser 14:08:42 11/03/14 (1)
Thanks for the offer of your spare tubes but I can grab some at the local guitar shop. Iam going to give those 12AY7 a good listen and if they don't pan out I spotted some Tungsram 12AT7 at the local hifi shop that get some good reviews. Thanks again. Jeff
- RE: Try some 12AY7's. - Cory M. 16:44:24 11/03/14 (0)
  Cool. Hey, do us a kindness if you could, and post your impressions once you've listened through them for a while. I'd be curious to know if your results mirror what mine have with the 12AT7 to 12AY7 swap.
  
  Keep in mind also, there are a lot of good suggestions in this thread. As Mechans said, NOS/ UOS (and even new) 12AT7's are still plentiful and fairly inexpensive. All of the ones that have been suggested are good/ different. You may want to collect a few pairs over time, and find out which ones are best to your ears. And airtime makes a great point- impedance matching can work wonders for the sound.
  
  Cory

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