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Old 31st October 2010, 03:28 PM   #1
Stee is offline Stee  Italy
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Default 6922 sepp with Balanced Gains

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here you can find a version of Aikido
in my picture a modification
where cathode have anode gain and viceversa
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Old 31st October 2010, 05:23 PM   #2
Stee is offline Stee  Italy
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Default 6SN7 SRPP AND SEPP

probably to have exactly the same gain between two rails @ zero NFB
need a SRPP before
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Old 1st November 2010, 07:11 AM   #3
Stee is offline Stee  Italy
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Default dual supply

to solve the problem of GND
also good for headphone OTL stage
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File Type: png headphnone 6SN7 6AS7.PNG (27.8 KB, 97 views)
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Last edited by Stee; 1st November 2010 at 07:20 AM.
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Old 1st November 2010, 12:01 PM   #4
DF96 is offline DF96  England
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In post #2 that is not an SRPP, but an active load. SRPP takes output from the upper cathode, not the lower anode.

The result is not a verson of Aikido, because you have lost the main point of Aikido - that the signal currents balance at the HT supply.
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Old 1st November 2010, 03:51 PM   #5
Stee is offline Stee  Italy
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Default yes true

but where is the news?
using three identical devices
with the same bias
you get the same gain
on both branches without feedback
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