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RE: Addendum

Ralph

I am not a keen small amp believer went it comes to ELS speakers.

As you may well know, more tubes in parallel means lower impedance (if all things remains the same). Even with transformer coupled ones, it makes winding the OPT an easier task.

20kHz is not near high enough. To get really airy highs, a minimum target is 25kHz.

I do not know of any ELS that does not drop its impedance to 1 to 2 Ohms at 20kHz.

Coupled with your (and my) love for zero feedback, small tube amps is but a dream IMO.

Can 1500pF be wound into the secondary of the high frequency transformer? I believe that even 500pF is enough.

Lew, did you measure the Au Transformer secondary winding capacitance?


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  • RE: Addendum - KIS 21:13:55 04/27/12 (0)

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