05-09-2013, 05:21 PM
What is the voice coil impedance? It looks like it is 1.1 Ohm.
The Push-pull transformer has finer grained impedance matching; unfortunately 125 SE series does not. The highest you will get at 1.1 Ohm voice coil is 2.5K Ohm primary impedance and 42 tube needs 7K Ohm.
Also Hammond SE is very expensive.
I used this with my Zenith
http://www.ebay.com/itm/OT8SE-Tube-Outpu...2321364cc4
It's half price.
However, this is not a match either.
What is exact voice coil impedance?
The Push-pull transformer has finer grained impedance matching; unfortunately 125 SE series does not. The highest you will get at 1.1 Ohm voice coil is 2.5K Ohm primary impedance and 42 tube needs 7K Ohm.
Also Hammond SE is very expensive.
I used this with my Zenith
http://www.ebay.com/itm/OT8SE-Tube-Outpu...2321364cc4
It's half price.
However, this is not a match either.
What is exact voice coil impedance?