Just checking to make sure I am correct. 2-El84's in push pull need about 8000 ohms primary impedance. If I double the number of output tubes I would then need about 4000 ohms.
Am I correct?
Am I correct?
2 posters
transformer primary impedance
sailor- Posts : 269
Join date : 2011-04-04
Roy Mottram- Admin
- Posts : 1838
Join date : 2008-11-30
that's correct
another thing most people don't realize is that if you use a different secondary winding the reflected impedance to the primary changes,
so instead of using the ratio of 8K to 8 ohms, you could connect to the 4 ohm tap using 8 ohm speakers and the primary impedance will be 4K.
It's the same transformer ratio 4K to 4 ohms.
another thing most people don't realize is that if you use a different secondary winding the reflected impedance to the primary changes,
so instead of using the ratio of 8K to 8 ohms, you could connect to the 4 ohm tap using 8 ohm speakers and the primary impedance will be 4K.
It's the same transformer ratio 4K to 4 ohms.