Eddie Current Electra Electrostatic Amplifier
Jun 10, 2012 at 11:19 AM Post #76 of 456
One of them is vertically challenged and the other isnt.
 
Jun 10, 2012 at 11:33 AM Post #77 of 456
Here is a list of what should work, if the tube socket is wired correctly
(G3 tied to cathode)
 
6L6G  (and A,B,C versions)
5881
5932
7027
EL34
6CA7
KT77
WE350B
 
Compatible with an adapter
6550
KT88
KT90
 
Jun 10, 2012 at 3:38 PM Post #78 of 456
The 350b would work wouldnt it?
 
Jun 10, 2012 at 7:43 PM Post #79 of 456
Yep the 350B has the same pinout and voltages.
NOS on those could be silly amounts of money.
Current price over $700 each.
 
Jun 10, 2012 at 10:02 PM Post #80 of 456
I would be happy if I could find them for $700. I am seeing $900 - 1800 for 1.
 
Jun 10, 2012 at 10:20 PM Post #81 of 456
Quote:
I would be happy if I could find them for $700. I am seing $900 - !800 for 1.

 
Oh, so they're even cheaper than the big bulbed Osram PX25s.  That's like a Bluelight special!
 
Jun 10, 2012 at 10:59 PM Post #82 of 456
Here is a list of what should work, if the tube socket is wired correctly
(G3 tied to cathode)
 
6L6G  (and A,B,C versions)
5881
5932
7027
EL34
6CA7
KT77
WE350B
 
Compatible with an adapter
6550
KT88
KT90
    Dear Kevin ,  thanks for the info.  Could you recommend which tubes for each types should we consider?  I am thinking about
     6L6GC  : RCA, Sylvania
     EL34 :   XF1, XF2,  Metal base
     KT77 : GEC NOS
     350B  :  WE 350B, WE367A?
Should this be enough?
 
 
Jun 10, 2012 at 11:02 PM Post #83 of 456
Just heard back from Craig.  Looks like the Electra is down to one cap now.  
smile.gif

 
Jun 10, 2012 at 11:33 PM Post #85 of 456
Just heard back from Craig.  Looks like the Electra is down to one cap now.
    I also heard that the performance may be approaching DIY T2 with higher gain to drive O2mkI
The SE version will change from the pentode tubes to triode tubes    ,  that's also good news.
 
Jun 11, 2012 at 12:04 AM Post #87 of 456
You do NOT need more gain to drive the O2 (and I find the T2 comment to be highly suspect)
 
Quote:
Just heard back from Craig.  Looks like the Electra is down to one cap now.
    I also heard that the performance may be approaching DIY T2 with higher gain to drive O2mkI
The SE version will change from the pentode tubes to triode tubes    ,  that's also good news.

 
Jun 11, 2012 at 12:17 AM Post #89 of 456
Cant wait, just waiting for the preorder to open up.
 
Jun 11, 2012 at 12:31 AM Post #90 of 456
Quote:
You do NOT need more gain to drive the O2 (and I find the T2 comment to be highly suspect)
 

 
He meant it in a good way, as in top dog amp.  Forgive Purrin's lack of eloquence.  Snow blinded by all that TP.  
tongue.gif

 

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