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Old 18th April 2013, 04:06 PM   #1
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Question Tamura F-2012

Does anybody have a datasheet for the Tamura F-2012? I've tried looking all over the 'net and can find no detailed info.

Or, at least, does anybody know what the turns/impedance ratio to the cathode FB winding is?

I know I can measure it, but I'd prefer to have the manufacturer's datasheet... Japanese language is fine.

TIA!

Pete
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Old 18th April 2013, 04:47 PM   #2
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I think you have to work a little
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Old 18th April 2013, 07:30 PM   #3
45 is offline 45  Italy
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Quote:
Originally Posted by pmillett View Post
Does anybody have a datasheet for the Tamura F-2012? I've tried looking all over the 'net and can find no detailed info.

Or, at least, does anybody know what the turns/impedance ratio to the cathode FB winding is?

I know I can measure it, but I'd prefer to have the manufacturer's datasheet... Japanese language is fine.

TIA!

Pete
The cathode feedback winding should be 16R as for other Tamura transformers. This means, for example, that for class AB operation the effective load seen by each tube will be [ SQRT(1250) + SQRT(16) ]^2 = 1548 ohms and the beta will be SQRT (16/1548) = 0.102 (or 10.2%) if you have two cathode windings.

Last edited by 45; 18th April 2013 at 07:33 PM.
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