A-430 or A-431 winding

I saw it was posted time ago the winding sequence of the A-470 transformer.

Somebody know about the winding of A430/ A431 output transformers? Or are them still a secret?

Hi --- is this what you are looking for??

http://www.tubebooks.org/file_downloads/dynaco_transformers.pdf

Check the A43X diagrams.

Stew

stewdan wrote:Hi --- is this what you are looking for??

http://www.tubebooks.org/file_downloads/dynaco_transformers.pdf

Check the A43X diagrams.

Stew

No, I know about external connections.

I mean the sequence of turns into the transformer coils.

F.

Hi --- Take a look at these links, I think the 1st one is what you are looking for.


The A470 OPT Winding Diagram ..................
http://www.diytube.com/phpBB2/viewtopic.php?t=3694&sid=057d98e9066c0d0915878e91e02602e5

Dynaco A470 Output Transformer Measurements
https://www.audioasylum.com/cgi/vt.mpl?f=amp&m=196142

Stew

stewdan wrote:Hi --- Take a look at these links, I think the 1st one is what you are looking for.


The A470 OPT Winding Diagram ..................
http://www.diytube.com/phpBB2/viewtopic.php?t=3694&sid=057d98e9066c0d0915878e91e02602e5

Dynaco A470 Output Transformer Measurements
https://www.audioasylum.com/cgi/vt.mpl?f=amp&m=196142

Stew

Ok, but all this info are for the A-470 transformer which was/is used on ST70. I need info about the A-430/A-431, which was /is used on the Dynaco MKII and MKIII monoblocs.
Iguess the winding is more or less same.

The input and output impedance is the same (4.3K input, 4-8-16 output), but the power is different, so I think that iron and wires has slghtly bigger dimensions than the one reported for the A-470.

I needed for two reason: I have two transformer in theory compatible with Dynaco MKII, but I have some suspect they do not have same winding. Then, I would like to wind myself two clones just for fun, and also for use on my monoblocks

F.

Hi ---- I went to the diytube link  
and clicked on each of the Board Index < Amplifiers < ST70 and Mark III parts of the link but could NOT find Mark III or A43X OPT info that looks like the A470 info.

I also checked at audioasylum, audiokarma and a few other tube sites, but came up empty.

So, I am out of ideas.
Good luck,
Stew