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Re: Parallel SE Amps *Notes on Blurring*

Steve,

I am sure this has been said already below but 2 amps in parallel will result in a impedance/4 so 2 16 ohm taps will reflect correctly at 4 ohms. Still not better than a single tube, but better than paralleling.

Blurring is caused by the shutting down of one of the triodes in a transient nature. I use to make the TWIN and I could not understand why the power was not what I calculated it would be. So I put a 10 ohm resistor in series with each plate and did FFT testing and what I found was that no matter how well the tubes where biased and from seperate grid sources, one tube would end up shutting down the other. This is what I think causes the blurring. I did not find this as true with pentodes but do think there is a similar ideal happening there also.

Gordon

Go with a single tube and have better sound!
J. Gordon Rankin

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