[DouglasQuaid]

Quote:

Originally Posted by pabbi1 /img/forum/go_quote.gif I do have an extra set of boards...

Peer pressure is a dirty thing. I'd be happy to take a set to play around with, assuming it's not your personal spare. It should be fun having two DIY Stax amps side by side. Solid-state for the summer to try to cut down on heat sources and the Hybrid for wintertime to keep my room nice and toasty. When the temps break 100, I might have to resort to switching to my dynalo.

 

[pabbi1]

Quote:

Originally Posted by spritzer /img/forum/go_quote.gif I should get the Vulcan boards soon as Marc forgot about me...

Marc has Dynafet Fever - can't blame him, as I started kitting up a 307a amp yesterday - it is a sickness.


Quote:

Originally Posted by DouglasQuaid /img/forum/go_quote.gif Peer pressure is a dirty thing. I'd be happy to take a set to play around with, assuming it's not your personal spare. It should be fun having two DIY Stax amps side by side. Solid-state for the summer to try to cut down on heat sources and the Hybrid for wintertime to keep my room nice and toasty. When the temps break 100, I might have to resort to switching to my dynalo.

I have them in case we need to try a clean build with work arounds, but if the existing boards will work, no need for me to build a second, as I'm just doing proto duty.

 

[spritzer]

Quote:

Originally Posted by pabbi1 /img/forum/go_quote.gif Marc has Dynafet Fever - can't blame him, as I started kitting up a 307a amp yesterday - it is a sickness.

Believe me... I know. Most of today I've been thinking about a mini ES-1 and next job is to check if I have all the parts needed to build one quickly on a perfboard.

 

[digger945]

Quote:

Originally Posted by pabbi1 /img/forum/go_quote.gif Marc has Dynafet Fever ...

I think that's goin' around these parts.

Probly wont see a cure for at least 6 months.

 

[n_maher]

Quote:

Originally Posted by pabbi1 /img/forum/go_quote.gif Now, Nate, about getting four matching quads out of eighty 6s4a....

We'll figure something out, I'm sure.

 

[DouglasQuaid]

Quote:

Originally Posted by spritzer /img/forum/go_quote.gif Believe me... I know. Most of today I've been thinking about a mini ES-1 and next job is to check if I have all the parts needed to build one quickly on a perfboard.

is there an es1 schematic out with resistor values and all? The only one I saw was the one Kevin drew and there were no values written. And in that case, does the es2 run same tubes and topology?

As for dynafet, I wish the new dual-jfet design would get released already.

 

[spritzer]

Here is the original Stax schematic for the amp.



I would perhaps tweak the plate resistors but Mikhail didn't. Well unless running parallel resistors takes some sort of thought besides being cheap and not be willing to pay for more expensive resistors. That schematic is lacking any adjustment for the output tubes so that would have to be added though. The ES-1 and ES-2 are identical.

 

[Wenglish]

The progress of this thread/evolution of ideas was very interesting to read through. Color me very interested in this amp. I just wish I had something more substantial than that to add.

 

[luvdunhill]

Quote:

Originally Posted by spritzer /img/forum/go_quote.gif I should get the Vulcan boards soon as Marc forgot about me...

I predict you'll have them a week from Friday

 

[pabbi1]

Quote:

Originally Posted by luvdunhill /img/forum/go_quote.gif I predict you'll have them a week from Friday

Well, here is something for Birgir to look forward to... oh, and the final coat of Tung oil just went on, so case will be dry in the morning, so money shot tomorrow EXCEPT for the jack...

 

[krmathis]

Looking really nice!

 

[spritzer]

Yay Marc and Al.

Here's my contribution, a mini ES-1.



Those are just the filaments fired up so now I have to find a working HV supply (I tend to blow them up

) and see if it catches fire or just makes music.

 

[Emooze]

Wow, both of those look amazing for a first attempt.

Super impressed

 

[AudioCats]

Quote:

Originally Posted by spritzer /img/forum/go_quote.gif Yay Marc and Al. Here's my contribution, a mini ES-1. Those are just the filaments fired up so now I have to find a working HV supply (I tend to blow them up ) and see if it catches fire or just makes music.

the two pieces of paper under the board has some interesting writing on it, care to share?

 

[spritzer]

Here ya go. This is what Mikhail used to build the ES amps but it lacks one of the most important things, how to set up the filaments. The author of the text does touch on it but far from enough IMO. It's quite clear in the original Stax schematic how they are supposed to be wired.