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Old 25th May 2012, 10:32 AM   #1
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Default Datasheet Cpk values

Dear folks,

Sorry for this simple question but Im a little bit confused about naming of capacities in valve datasheets.

For simulation models I need:
Cpk, Cgp and Cpk

At datasheet ( example 6N23P ) I get:
each triode output 3.6pF
output 2.0pF
transfer each triode 1.5pF
anode-to-cathode each triode 0.18pF

Cpk is 0.18pF but what does "input", "output" and "transfer" means?

Thanks a lot
Karsten
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Old 25th May 2012, 04:58 PM   #2
nazaroo is offline nazaroo  Canada
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You might try comparing a Russian tube that is a copy of a known American tube, such as a 6922 or something,
and see if the Miller capacitance etc. lines up.
Then see which names match which American name conventions,
on the datasheet from the American tube.
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Old 25th May 2012, 06:52 PM   #3
DF96 is online now DF96  England
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Transfer probably means Cpg(Cag). Input probably means Cgk+Cpg. Output probably means Cpg(Cag)+Cpk(Cak). However, it would depend on whether the datasheet assumes grounded cathode (most valves) or grounded grid (some VHF/UHF valves).
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Old 25th May 2012, 09:01 PM   #4
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Hello,

Thank you both! Thats really helpful hints I see, it's not as simple as I thought...

Best regards
Karsten
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