Restoration of four Leak TL12 plus valve power amplifiers.
This project took me a long time to complete because I did not work on it full time.
Some interesting facts regarding the Leak 12 plus amplifier:
Two types of output transformers were used on these amplifiers. The early issue had
a 50% Ultra Linear screen grid tap that was later changed to 25%.
Three colours were used: champagne, bronze and grey.
The earlier types had the main AC fuse mounted on top of the mains transformer and
on the later ones it was mounted on the side of the chassis.
Two of mine were of the earlier type and the other two of the later issue.
Restoration included the replacement of capacitors/resistors/valves/sockets where it was
necessary.
One of the amplifiers still has to be repainted. I will do it on a later stage.
Tested all the amplifiers with modern test equipment to ensure the technical specifications
are in line with its original specifications.
I will later post some photos of the four restored amplifiers.
Interesting is that the output transformers of the TL12 plus is the same as that of the
Leak ST20. The ST20 also had the same two different UL output transformer changes.
This project took me a long time to complete because I did not work on it full time.
Some interesting facts regarding the Leak 12 plus amplifier:
Two types of output transformers were used on these amplifiers. The early issue had
a 50% Ultra Linear screen grid tap that was later changed to 25%.
Three colours were used: champagne, bronze and grey.
The earlier types had the main AC fuse mounted on top of the mains transformer and
on the later ones it was mounted on the side of the chassis.
Two of mine were of the earlier type and the other two of the later issue.
Restoration included the replacement of capacitors/resistors/valves/sockets where it was
necessary.
One of the amplifiers still has to be repainted. I will do it on a later stage.
Tested all the amplifiers with modern test equipment to ensure the technical specifications
are in line with its original specifications.
I will later post some photos of the four restored amplifiers.
Interesting is that the output transformers of the TL12 plus is the same as that of the
Leak ST20. The ST20 also had the same two different UL output transformer changes.
