pucho812

You tell me whar a man gits his corn pone, en I'll tell you what his 'pinions is.


mrclunk

Re: Rusty transformers
« Reply #1 on: February 18, 2019, 07:03:57 AM »
Very interesting, thanks.
I can't wait for the hifi crowd to get on board with this...
"All our transformers are hand oxidised in virgin glacial water, siphoned by blind nomads deep in the foothills of Everest."

pucho812

Re: Rusty transformers
« Reply #2 on: February 18, 2019, 01:17:16 PM »
On one hand rust is bad especially in you using them in ham applications.  Rust does not shield well.

But on the other hand is the rust is cosmetic for audio seems to function without issue.
You tell me whar a man gits his corn pone, en I'll tell you what his 'pinions is.

rackmonkey

Re: Rusty transformers
« Reply #3 on: February 23, 2019, 01:02:36 PM »
I guess there’s also a threshold of “too much of a good thing”. Iron oxide is significantly less permeable than iron. If the rust penetrates deeper than just the surface of the laminations, it would lower the permeability of the core.

But it’s an interesting idea. First I’ve heard about surface rust reducing eddy currents. From experience, I’ve used a quite a few rusty transfoermers that sound great. Especially old Jensen JE-123-S in API circuits. Seems like just about every one of those Jensens from the 70s have a healthy layer of oxide on them.
Whether you think you can or you think you can't, you're probably right.


 

Related Topics

  Subject / Started by Replies Last post
45 Replies
27487 Views
Last post July 15, 2004, 08:31:15 PM
by jhaible
6 Replies
1874 Views
Last post May 24, 2009, 02:48:38 AM
by PRR
14 Replies
2460 Views
Last post July 24, 2009, 02:04:58 PM
by CJ
28 Replies
15924 Views
Last post March 07, 2019, 06:58:23 PM
by EmRR