The board without wax
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
Removal of the old diodes:
An externally hosted image should be here but it was not working when we last tested it.
Enlarging the holes to fit the new diodes in:
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
The new Philips BY 228 Diodes soldered in place:
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
Completed board ready to be covered with beeswax:
An externally hosted image should be here but it was not working when we last tested it.
The beeswax-cube I picked up in a honey-shop is being melted:
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
The completed box:
An externally hosted image should be here but it was not working when we last tested it.
Making new patch cables for the unit by hand:
silver plated copper 1mm solid core wire insulated by PTFE ribbon used by plumbers covered by and additional heat shring tubing:
silver plated copper 1mm solid core wire insulated by PTFE ribbon used by plumbers covered by and additional heat shring tubing:
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
Last edited:
I replaced the old neon with a new one of the same size, 6*20mm
An externally hosted image should be here but it was not working when we last tested it.
The procedure of soldering the solid core patches:
I sourced titanium m3 screws and nuts for the replacement of rivets for fixing the phenolic selector board.
I sourced titanium m3 screws and nuts for the replacement of rivets for fixing the phenolic selector board.
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
For some reason, I decided to stay with uniform white color for all the patch cables
An externally hosted image should be here but it was not working when we last tested it.
Finished EHT unit:
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
Will look something like this:
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
Troubles redoing the 8mm diameter hole in the back of the audio transformer.
The previous owner 'drilled' a larger diameter hole to accomodate a larger and 'better' input sockets, but he removed them after selling the speakers and refitted the OEM plugs those were wobbly in these holes. So, I had to redo the holes with some method.
First, I had used some 'commercial 'epoxy putty, that fell out every time, and had limited durability regarding heat. I had a luck to obtain some nice high temperature putty that stayed in place at least after the drilling and painting too.
The previous owner 'drilled' a larger diameter hole to accomodate a larger and 'better' input sockets, but he removed them after selling the speakers and refitted the OEM plugs those were wobbly in these holes. So, I had to redo the holes with some method.
First, I had used some 'commercial 'epoxy putty, that fell out every time, and had limited durability regarding heat. I had a luck to obtain some nice high temperature putty that stayed in place at least after the drilling and painting too.
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
Time to refit the windings into the box:
An externally hosted image should be here but it was not working when we last tested it.
I simply covered the holes with cellotape, filled the box with hot wax, and carefully slid the whole block into it. I had no troubles with the earthing, the four screws on the top managed to get in contact both the box and the transformer's housing through the excess wax.
This is the epoxy I used with success: (sorry for the advertisement)
An externally hosted image should be here but it was not working when we last tested it.
The finished audio transformer:
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
