Altec 525 transformer secondary current

[Pat Maki]

I'm rebuilding a couple of 525 psu's and need to replace the transformers. Can anyone please confirm what current you're getting across the 250V secondaries (red/white leads)? I'm getting 1A....but this secondary is also putting out 305VAC instead of 250VAC, so no sure the current reading is exact enough.

Since I've gained a lot of space in the chassis after swapping the large canned elcaps to smaller modern ones, the plan is to simply add a second trafo in each psu to get the 250VAC.

 

[Khron]

I'm getting 1A

As in, you ARE applying some sort of dummy load to it? Or how are you getting that "1A"?

https://sound-au.com/xfmr2.htm#s113

 

[Pat Maki]

Thanks for the reference link. Will dive into that. Tube mic is attached with the capsule removed...not sure if the capsule being removed disqualifies it as the load.. my assumption is that the heater/cathode/plate/grids....even with no capsule, account for a vast majority of current drawn.

 

[Khron]

not sure if the capsule being removed disqualifies it as the load

It does not; the capsule is a capacitor, and as such, draws no DC current.

my assumption is that the heater/cathode/plate/grids....even with no capsule, account for a vast majority of current drawn.

That's correct.

I'm getting 1A

Still haven't gotten an answer to this, though...

And where are you measuring that "305VAC"? That's in case that is indeed measured anywhere...