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Old 22nd March 2013, 03:53 PM   #21
rknize is offline rknize  United States
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Do you have an aux film cap attached to the PCB? If not, C2 deserves some consideration.

You have a pretty good cap for C10/20 already. I honestly don't know what to make of the KZ series. Other than some vague statements, there is not much on the data sheet in the way of specs. The PW that you have shows the specs for impedance and ripple current, since they are designed for power supply filter use. C10/20 are, effectively, power supply filters. They hold the cathode voltage steady as the current through the tube varies. They are coupling caps in the sense that they AC-couple the cathodes to ground.
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Old 22nd March 2013, 06:00 PM   #22
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Wow ... For a newbie like it sounds gibrish.
I will be happy if you can explain in simple words as I have no electrical knowledge
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Old 22nd March 2013, 07:52 PM   #23
rknize is offline rknize  United States
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1) I don't see much point in swapping the PW-series for the KZ-series caps for C10 and C20.

2) Do you have an auxiliary cap installed on the board?

3) The coupling cap is a matter of taste. The one you have is a fairly generic one, I think.
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Old 23rd March 2013, 09:02 AM   #24
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Hi .
Thanks . What I meant is that I would be happy if you can explain ( in simple words ) how each cap influence on the performance

Thanks
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Old 23rd March 2013, 03:28 PM   #25
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Sagi: Auxiliary cap=motor run cap.

Using this cap in parallel with the last cap in the PS reduces the output impedance, increases the capacitance of the PS and would certainly assist an average cap in the last PS position. Cornell Dublier LX series caps in the PS are an excellent choice.
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Old 23rd March 2013, 03:51 PM   #26
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Got it . So I have motor run cap .

Thanks
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