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Old 1st May 2021, 5:32 pm   #19
ms660
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Join Date: Apr 2011
Location: Cornwall, UK.
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Default Re: Ferguson 401 radiogram

A general rule of thumb for the ripple current rating for a reservoir capacitor (the one connected directly to the cathode) is that it should be at least twice the DC load current.

The maximum reservoir capacitance given in the GZ32 valve data is 60uF providing the total series resistance is a minimum of 150 Ohms:

http://www.r-type.org/pdfs/gz32.pdf

Lawrence.
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