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Joachim Gerhard Filter Buffer for ES9022

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#643
Here is a question about using the JG Filter buffer in balanced mode.

I would like to buffer each phase with one channel of the buffer, with a transformer coming after the buffer for unbalancing. Here is my question: Do I need to terminate the buffer to ground (let´s say with a 100k resistor from each phase-output to ground) to get a fixed ground reference?

I am missing the usual output resistor to ground and wonder if it is necessary in this design.

Thank you
Florian
 
#651
Great! Sent an inquiry in early December, was patient as I know he's swamped. Been there, done that!

Am I correct in my understanding that the current Filter-Buffer boards are a little different from the original ones? I have one of the originals and wanted to get another to use for a balanced-output setup... will one original and one current be sufficiently matched to each other?

TIA!

Greg in Mississippi
 
#653
The current outstanding list :

Eldam 1x
nicusim 1x
yacuza 1x
Greg Stewart 1x
Scuba 2x
leto 1x
baswamin 1x

If we missed anyone please kindly amend list above. Our apologies.

PCB has slight revision to avoid soldering mistakes.
Otherwise no change.


Patrick
 
Last edited:
#658
Those on the list above please kindly check your PM for further instructions and respond accordingly.

Due to excessive load at work, we have to suspend further DIY activities until further notice, most probably not before April 2014.


Thank you for your interest ans your support,
Patrick
 
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