Question about current ratings of Hammond 300 series power transformers.

[Evenharmonics]

I would try others like Edcor.
Hammond's PT spec and actual numbers are not very close.

[G]

Originally posted by Ty_Bower
Have you tried looking through the .pdf of all Edcor's power transformers? They might have something in there...

http://www.audiotransformers.net/for...hp?topic=198.0

The first one I see might be an XPWR105. It says it is good for 360 VCT at 250 mA, and 6.3V at 3 amps. There might be other candidates in the list too.

Spot On! I just ordered the 105 and the 104. They are running about 3 weeks behind though but that is just fine. They look like really nice transformers and their specs are perfect for my new preamp/amp! I had forgotten about Edcor. Thank you. Bandersnatch is going to drool all over himself when I post pics of the 12B4a powerhouse amp I'm building.

[Geek]

Originally posted by Evenharmonics
I would try others like Edcor.
Hammond's PT spec and actual numbers are not very close.

I found the current ratings OK, but voltages to be somewhat highish.

Example, I have a 279GX here rated 225-0-225 @ 65mA and 6.3V @ 2.5A. At full load she delivers 250-0-250 HV and 6.7V heater

Originally posted by G
They are running about 3 weeks behind though but that is just fine.

Good to hear their business is picking up. They were 2 weeks behind last week

Cheers!

[mosfets]

Originally posted by Geek


I found the current ratings OK, but voltages to be somewhat highish

Typical for Hammond at 60Hz. Tubelab has noted above. Depending on your application, I guess it could be a nuisance.

[Geek]

Hi,

Originally posted by mosfets


Typical for Hammond at 60Hz. Tubelab has noted above. Depending on your application, I guess it could be a nuisance.

I should have read more closely

But yeah, it is a nuisance, as it meant extra and unanticipated regulator dissipation.

Cheers!