RE: IT Transformer connection phasing

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In Reply to: RE: IT Transformer connection phasing posted by deafbykhorns on September 17, 2016 at 15:26:21:

I think there's a confusion of two issues. (1) If you hook up the IT backwards, the impedance seen by the grid will be way higher than if hooked up the otherway - leading to shitty highs. and (2) The Inverted Interstage where the IT is gapped and wound EXPLICITLY to deal with both grid current from an A2 tube, and plate current from the driver.

In the case of (2), the transformer is not 1:1, it has a lower turns ratio to provide low voltage but high current swings of grid current. That means it not bifilar wound and it means the directions of current must be opposed to provide flux cancelling.

To solve (1), just try it! To solve (2) requires explicit magnetics design and custom winding.

-- Jim

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Follow Ups Full Thread

Topic - IT Transformer connection phasing - deafbykhorns 19:44:36 09/16/16 (9)

RE: IT Transformer connection phasing - Chip647 06:27:05 09/17/16 (8)

RE: IT Transformer connection phasing - andy evans 09:36:04 09/17/16 (7)

RE: IT Transformer connection phasing - Chip647 14:35:13 09/17/16 (6)

RE: IT Transformer connection phasing - deafbykhorns 15:26:21 09/17/16 (5)

Shunt capacitance - Triode_Kingdom 23:57:05 09/17/16 (3)

RE: Makes perfect sense now - deafbykhorns 10:56:16 09/18/16 (2)

I connected it wrong at first too.... - andy evans 11:40:28 09/18/16 (1)

RE: I connected it wrong at first too.... - deafbykhorns 16:20:05 09/18/16 (0)

RE: IT Transformer connection phasing - Jim Doyle 19:08:12 09/17/16 (0)

Follow Ups

RE: IT Transformer connection phasing - Jim Doyle 19:08:12 09/17/16 (0)

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