On Sun, Nov 20, 2022 at 02:45 PM, John KN5L wrote:
Are we talking about the Q of the resistors self capacitance?
Yes, Per Steve's measurement, 11Mohm resistor has parallel capacitance
of 0.4pF with Q=45.
John KN5L
? OK, I see it a little different. The parallel capacitance has its own loss resistance associated with it.
?I think you ignored that?
11M¦¸ = R1, ? Rmeasured or Rm= 5,190,000? Rcp = Loss resistance of parallel self capacitance, it's the unknown.
Rt = R1 + R2, rearranged it is R2 = Rt - R1, Changing the names? 1/Rcp = 1/R1 - 1/Rm = 1/5.19M¦¸ - 1/11M¦¸ = 1/Rcp or 9,848,000¦¸.
So, what I think we have is loss resistance (from the self capacitance) of 9,848,000¦¸ in parallel with 11,000,000¦¸ which equals,
5,190,000¦¸.
Leaving us with a Self Capacitance Q of 22.17.
What do you think?
?????????? Mikek
?
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Thanks, Mikek
