15K Primary Impedance Output Transformer

High primary impedance (>10K Ohm) has always been a challenge for most winders. Unfortunately, such high primary impedance are required for older tubes, like 6J5G, 6SN7, 801A and etc, that have Rp (internal plate impedance) of ~4K Ohm.


Here's a preview of the upcoming 15K OPT for 801A and similar tubes: 

20Hz to 20kHz TOTALLY FLAT

Full bandwidth: 10Hz (-0.5dB) to 60kHz (-3dB), measured with 801A tube in actual performing circuit.

J&K Audio Design

Product Lists  
Level 0

Level 1: link 1, link 2, link 3

Level 2: link 1, link 2, link 3, link 4, link 5, link 6 

Level 3: depends on type, size and complexity. Email us for details.

Iso-trans: link 1, link 2

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