07-08-2012, 09:04 PM
David
How are you setting up your output meter?
It is perfectly acceptable to connect the output meter between plate and B+ of the output tube...in other words, across the primary. In fact, this is preferred to connecting your meter across the speaker voice coil.
But you are not measuring DC voltage; you want to measure AC voltage across the output transformer primary.
Same thing if you connect the output meter across the speaker voice coil - you want to measure AC voltage, and it will be a low voltage.
If the reading does not change when varying the level of the volume control or the signal level...then something is wrong with your output meter.
How are you setting up your output meter?
It is perfectly acceptable to connect the output meter between plate and B+ of the output tube...in other words, across the primary. In fact, this is preferred to connecting your meter across the speaker voice coil.
But you are not measuring DC voltage; you want to measure AC voltage across the output transformer primary.
Same thing if you connect the output meter across the speaker voice coil - you want to measure AC voltage, and it will be a low voltage.
If the reading does not change when varying the level of the volume control or the signal level...then something is wrong with your output meter.
--
Ron Ramirez
Ferdinand IN
![[-]](https://philcoradio.com/phorum/images/bootbb/collapse.png "[-]")
