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Old 25th October 2004, 08:15 AM   #1
garbage is offline garbage  Singapore
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Lightbulb DRD calculator

hi all

when i was approaching the drd design, it just drove me nuts figuring out the resistor values. especially i'm a tube newbie. learning all the jargons of the tube world is staggering.

but thanks to the knowledge in this forum, and pointers from others, i think i more or less understand it now.

thus, i've put together an excel spreadsheet that will calculate resistor values and B+ for DRD design that appeared in VTV.

there is another sheet on the excel that calculates HD2%, HD3% and HD4% given inputs such from a loadline graph. (graph has to be drawn yourself though).

just wanted to share it with others.

cheers
garbage
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Old 25th October 2004, 01:37 PM   #2
garbage is offline garbage  Singapore
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Default attachment was not in .zip format

let me try again...
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Old 29th October 2004, 02:31 PM   #3
garbage is offline garbage  Singapore
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Default updated drd calculator

the current flow is wrong in the previous calculator.
the one here should give the correct values, after clarifying at this thread (thanks guys)

also included is a field that takes OPT resistance as input. this is to cater for voltage drop across the OPT as pointed out by Jim D at AA.

cheers
garbage
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