14-06-2016, 12:23 PM
(14-06-2016, 11:32 AM)unrealdave Wrote: There is a place for a valve rectifier but I don't know which one.
any ideas?
Being B9A and assuming a 6.3V heater winding is provided will narrow it down to an EZ80 or EZ81, dependent on maximum current.
It looks a bit unusual, to say the least! It looks as if you have 4 silicon diodes, rear left, for a bridge rectifier for the low voltage supply which is obviously fed to a stabilizer of some kind - probably two - based around the devices on the heat sinks.
The Bulgin male beside the transformer will be Mains in - if you can find the matching female! - and there are two unmarked terminals on the front edge.
However, there doesn't seem to be any other output connection potential unless there are other connectors we can't see.
I think you are going to have to trace this out in order to find out exactly what is going on unless someone can recognise it from somewhere ...
... and just as I was about to preview this the site froze up on me!
Fortunately I had the wit to do a CTRL+A, CTRL+c to copy it to the clipboard because otherwise I would have lost it!
