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Andy Cowley
 
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Default 5K OPT in place of 3K ?

wrote:

Hello,

I have an opportunity to have SE OPT 5K / 0,4,8 ohms. Big good ones
second hand, cheap price.
But i want to build 300B SE, usually it is more 3K OPT.

Is there a way to use them for a 300b amp. ?


Dear Luc,

Primary impedance is secondary impedance x turns squared.

Just connect a 4 ohm speaker to the 8 ohm tap.
Primary impedance will then be 2.5k.

Speakers are not constant impedance loads anyway. A good
transformer will be fine like this.

best

Andy