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17th November 2009, 04:31 PM
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#1 |
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diyAudio Member
Join Date: Apr 2002
Location: Llanddewi Brefi, NJ
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The soul of a new "electrostatic" machine
to borrow a phrase from Tracey Kidder -- wouldn't the Impasse Preamplifier with a bias supply work well to drive my electrostatic ear-speakers (Stax Lambda). I mentioned it to a friend at the NJAS meeting on Sunday.
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17th November 2009, 11:25 PM
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#2 |
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diyAudio Member
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I would think that the Impass was not designed for that service. I have not seen the Impass schematic, but I would think a Red Light with the headphone jacks on the primaries might be more like it.
The "nominal" sensitivity is measured with a 100 V pp signal. They are about 100pF. Takes some real current to charge that capacitor. Blue Hawaii used EL34 and an 800V ps. I would be interested in other responses. Doug
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Scienta sine ars nihil est - Science without Art is nothing. (Implies the converse as well) Mater tua criceta fuit, et pater tuo redoluit bacarum sambucus 
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18th November 2009, 02:22 PM
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#3 |
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diyAudio Member
Join Date: Apr 2002
Location: Llanddewi Brefi, NJ
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The Impasse is balanced out and I've gotten it to swing 60V RMS -- SY designed it to drive a pair of Pass F4 "current source" amps -- the input capacitance of which is a function of the 2SK170 and 2SJ74.
The Romans didn't have cricetae, they were native to the lands of the allemani. |
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18th November 2009, 05:22 PM
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#4 | |
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diyAudio Member
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Quote:
Its worth a try at 60V RMS. Details of the Pin-out for the Stax connector can be found at Headwize. Let me know how it works out.
__________________
Scienta sine ars nihil est - Science without Art is nothing. (Implies the converse as well) Mater tua criceta fuit, et pater tuo redoluit bacarum sambucus
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18th November 2009, 05:24 PM
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#5 |
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diyAudio Moderator
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Interesting idea; there's certainly symmetry. What's the load look like?
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"...we stumble and get up, we are sad, confident, insecure, feel loneliness and joy and love. There is nothing more; but I want nothing more.” - Christopher Hitchens 1949-2011 |
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