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3-500z Modulator Grid drive transformers

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Author Topic: 3-500z Modulator Grid drive transformers  (Read 746 times)
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Patrick J. / KD5OEI
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« on: March 31, 2020, 02:32:32 AM »

not mine.

as we know the 3-500Z needs 25W peak drive for full class B audio ratings.
Also, its very low driving impedance renders the usual driver transformers (like for 833s) very inefficient, almost unusable.
Driver iron is not abundant for 3-500Z at all.
Here are Triad 30 Watt units.. 500 Ohms CT to 32/16/8/4/2 Ohms. 40Hz-15KHz.
Easily driven by solid state amps, or a tube one. $20 each.
This kind of deal may never come around again. Closest thing is a new Edcor for $50-100.
I been through all of this, so..


pictures and data sheet - the audio guy has no use for them.

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