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K&K Audio / Lundahl Transformers Welcome! Need support, you got it. Or share youe ideas and experiences. |
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K&K Audio / Lundahl Transformers Welcome! Need support, you got it. Or share youe ideas and experiences. |
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In Reply to: 46 IT 46 posted by jdg123 on March 21, 2016 at 13:53:08:
There's nothing wrong with the proposition diagrammed above. With a 5K:8ohm output transformer, and two 46 gain stages, you will achieve a gain of about 8dB.
Given the plate impedance of the tube (something like 2400ohms) you could get good results from either the Lundahl LL2753/25mA (1:1) or the shown Lundahl LL2746/30mA (1:2). The Lundahl LL1663/30mA (5K:8ohms) would be my choice for output transformer.
With the output stage cathode resistor shown the IT secondary lead labeled "BIAS" will require a positive voltage applied or the output tube will be cut off. You could use a smaller value cathode resistor and then ground that secondary lead.
Kevin Carter
K&K Audio
www.kandkaudio.com
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Follow Ups
- RE: 46 IT 46 - KevinC 18:24:37 03/21/16 (1)
- RE: 46 IT 46 - jdg123 05:55:07 03/29/16 (0)
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