2a3 Operating Points

[Jim R.]

Hi Paul,

Bummer on the tfa-2004s, but it's no big deal really -- just had to ask as the measurementss looked fairly close.

And a special thanks for the rest of the post -- that's much more useful to me than something like "replace the 1.2k resistor with a...".  You kno, teach a man to fish and all that.

Thanks again,

Jim

[ebag4]

Ed,

I hope they are all to you that they are to Jim and I.  I can't wait to hear your impressions of the JJ 2A3-40 (and again after 250 hours)!!!!

John

BTW, I've only spoken with Mr. Eurotubes once but can assure you his cool...very nice guy and helpful. 

Hi John, I am hoping they arrive tomorrow, if not it should be Tuesday.  Can't wait to hear them. 

It appears that my caps should arrive sometime early next week as well, it will be difficult to refrain from installing the tubes and caps at the same time but my plan is to do one followed by the other at a later date so that I hear the differences each change makes.  More than likely I won't be able to wait more that a day or so, I'm like a little kid in that regard.

Best,
Ed

[InfernoSTi]

Ed, based on your other posts, I'm pleased you have found these tubes live up to the hype and then some!  Here is a photo showing the stock Sovtek 2A3 on the left and the JJ 2A3-40 on the right.  What a huge tube it is...it is hard to get a feel for the size until you see it in person!  John

(https://forum.bottlehead.com/proxy.php?request=http%3A%2F%2Fwww.hawthorneaudio.com%2Fphotos%2Falbums%2Fuserpics%2F11473%2Fphoto-213.JPG&hash=0a9e66a21540c0d4651ccc4f447efd7fc9f361e1)

[Jim R.]

And aside from the size difference, the weight and thickness of the glass is another thing you realize when you first handle them.  That's thee kind of thick glass you find on EML, EAT, and other similar quality tubes.

The JJ 300bs are likewise very beefy as well.

-- Jim