systemtruck
Well-known member
Pardon this question, which surely some of you well seasoned folks have had to begrudgingly entertain for the newbies once in a while.
The reason I’m asking is because I have my hands on some pretty beefy output transformers that are difficult to find specs / info about. They were made by HP in the dawn of their development.
I’m also asking because david at Cinemag mentioned to me recently that one of their transformers may not even bat an eye at some DC current because they’re so robust. This leads a new guy like me to think, hey, if these other HP transformers I have are quite literally 2X the physical size and weight of those Cinemag’s, or more, maybe they can handle some DC current.
Is any of this sounding like it has some mathematical backing?
I know that inductance is key for low frequency signal. I assume that gapping transformers makes up for lack of strong inductance. So im guessing here that if a transformer isn’t gapped but has massive inductance, maybe they’ll pass DC without too much loss of bass. But how much?
A completely different take on this is a quote I found somewhere…
“”” P-P transformers can work in a SE fassion if you measure your idle current of the tube and feed the current through the center tap as well as an equal current that goes to the other end of the 'unused' winding and you put a load resistor that draws the same amount of idle current as the tube. “””
The reason I’m asking is because I have my hands on some pretty beefy output transformers that are difficult to find specs / info about. They were made by HP in the dawn of their development.
I’m also asking because david at Cinemag mentioned to me recently that one of their transformers may not even bat an eye at some DC current because they’re so robust. This leads a new guy like me to think, hey, if these other HP transformers I have are quite literally 2X the physical size and weight of those Cinemag’s, or more, maybe they can handle some DC current.
Is any of this sounding like it has some mathematical backing?
I know that inductance is key for low frequency signal. I assume that gapping transformers makes up for lack of strong inductance. So im guessing here that if a transformer isn’t gapped but has massive inductance, maybe they’ll pass DC without too much loss of bass. But how much?
A completely different take on this is a quote I found somewhere…
“”” P-P transformers can work in a SE fassion if you measure your idle current of the tube and feed the current through the center tap as well as an equal current that goes to the other end of the 'unused' winding and you put a load resistor that draws the same amount of idle current as the tube. “””
