How to match a replacement OPT to an existing one.

[wdecho]

There are others but Uncle Doug is pretty good and detailed.

 

[Ken Boyd]

I will get the 1645's they are 5000 ohms.

 

[wdecho]

Another one.

For something that seems really simple, wire wrapped around some metal, it can get real complicated. Most people do not consider the impedance of the wire of the speaker. Resistance yes, but not the impedance.

 

[Mr Boochie]

I will get the 1645's they are 5000 ohms.

There you go! Solid transformers.

 

[wdecho]

I will get the 1645's they are 5000 ohms.

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