need your help to determine this preamp circuit

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Need your help to determine roughly the output impedance of this preamp circuit:

1. each channel use only one 6H30 as differential stage, yes, balanced in/output is expected

2. each half 6h30 run 20mA idle and plate load R is 6K (6h30 internal plate resistance us 820 ohm)

3. 6V6 for cathode ccs

I intend to have this single stage preamp in <2K output impedance, Is this circuit feasible?

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Topic - need your help to determine this preamp circuit - Eric Chan 02:27:22 01/25/17 (5)

RE: need your help to determine this preamp circuit - pmaneri@samsontech.com 09:00:09 01/25/17 (2)

RE: need your help to determine this preamp circuit - Eric Chan 09:12:34 01/25/17 (1)

RE: need your help to determine this preamp circuit - dave slagle 19:42:20 01/25/17 (0)

RE: need your help to determine this preamp circuit - Michael Samra 02:45:56 01/25/17 (1)

RE: need your help to determine this preamp circuit - Eric Chan 02:55:42 01/25/17 (0)

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