EL51 amplifier

	electron Tube Data sheets
	electron Tube Data sheets
	EL51 amplifier

2007-08-24
Here I will report a bit about an amplifier I'm building.
It may take a long time because I'm in no hurry to finish it ;-)
The main goal is to make an amp with 1930's side contact tubes without any semiconductors.
There will be the following tubes: 4x EL51, 7x AZ4, 2x EE1, and the rest EF6 tubes probably.
As you can see, the main transformers and the p-sockets are already mounted.
For the AZ4's I will add some small transformers at the bottom side, which is still completely empty.

2011-07-28
Here you can see that I made some aluminum pipes for the wires to the top connections of the tubes. It took a while to find a good solution. Glue was not working so I had to find something else. A friend of me suggested using a jack plug socket which is 6.35 mm while the aluminum pipe is 6mm. So they skew a bit but that is ok for me. Most mechanical work has been done so now I can add some electronic stuff.

2021-05-10
I decided to do something again ... Maybe finish it this year :)
One output stage is built and i'm tuning the circuit. I added a 4699 tube to reduce ripple voltage on the driverstage. The output transformers are replaced with 5k Raa types.

	2007-08-24 Here I will report a bit about an amplifier I'm building. It may take a long time because I'm in no hurry to finish it ;-) The main goal is to make an amp with 1930's side contact tubes without any semiconductors. There will be the following tubes: 4x EL51, 7x AZ4, 2x EE1, and the rest EF6 tubes probably. As you can see, the main transformers and the p-sockets are already mounted. For the AZ4's I will add some small transformers at the bottom side, which is still completely empty.
	2011-07-28 Here you can see that I made some aluminum pipes for the wires to the top connections of the tubes. It took a while to find a good solution. Glue was not working so I had to find something else. A friend of me suggested using a jack plug socket which is 6.35 mm while the aluminum pipe is 6mm. So they skew a bit but that is ok for me. Most mechanical work has been done so now I can add some electronic stuff.
	2021-05-10 I decided to do something again ... Maybe finish it this year :) One output stage is built and i'm tuning the circuit. I added a 4699 tube to reduce ripple voltage on the driverstage. The output transformers are replaced with 5k Raa types.