John Curl's Blowtorch preamplifier part II

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I have two 500VA transformers for the 2 x 330W/4ohm amplifier. I started with two 300VA transformers for the prototype that measured 2 x 270W/4ohm.

Good if not driving lower than 4 ohm ....


Carefully designed no peeking DBT of course? :rofl:

I have come to observe that there is no one answer, someone will hate any system that others might love.

Agree, but it was unanimous on the Batt supply only and split on the other setups, So yes very rare to get consensus in audio, hence why the decision on straight batteries was a surprise ...
 
For JC ------ From a research group in ACSP (Analog Circuits and Signal Processing --- (emphasis is mine)

"As normally happens in any area of research, the initial results are quit often derived intuitively which lead to systematic formulation of methodologies subsequently to enable the generation of all possible circuits belonging to a specific class."




THx-RNMarsh
 
What I find difficult to comprehend, is why people would go to the effort of oversized transformers and oversized reservoir capacitance, then realise they cause a spray of mains harmonics from the sharp, tall charging current pulses, then call up all kinds of chokes to migitate the oversized transformer and capacitance again.

To me that doesn't seem a very smart way to design your stuff, but probably I am missing something?

Jan

We will have to ask John et al on that one.

Reminds of the Naim (? IIRC) that had a 100VA transformer in one of their preamps when probably 15 VA would have done. I did not understand it.
 
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