A blue EL12N PP

[DeathRex]

The outputs are Edcor and the power is from the 10 pounder ebay special that Ed posted, the 170 volt version.
I ordered a couple of different knobs, hopefully one will look right.
It does just at 25 watts, luckily I put in Edcor's CXPP25.

[Geek]

*whistles*
Gorgeous!

I love the retro look to the chassis.

[SteveH]

Lovely chassis - how did you make it ?

[DeathRex]

The acrylic is from a bad piece at work, I just had to cut it in half. For the tube socket holes a regular hole saw is quick through plastic, even melts it a little bit. I put in plastic inserts for all of the tube sockets and brackets. The only screws showing are for the transformers and the aluminum on the back and rear of the sides. The local heating and AC place cut the aluminum and I bent it using a HF bending brake and a PVC pipe. Probably needed a steel pipe, because the PVC bent too much. There's more acrylic underneath with slits cut in for ventilation. Underneath I made eyelet boards, they work fine and all, but the eye is kinda small. It's my first all German tubed stereo.
I also learned how to set the bias on a directly connected cathodyne phase splitter. The EL12s run with about -18 volts on the control grid.

It was $6 for the aluminum, $0 for the plastic, $3 screws and nuts.

[Shannon Parks]

Sharp, sharp, sharp. Thanks for the post!

Shannon

[turing]

There are no native test data provided? Or simply rang the machine do?

[DeathRex]

You can find some data, and then you have to estimate; like the EF6 was replaced with the EF40, which was replaced with the EF86, so work backwards from EF86 data/schematic. I was using data from the ECH21 for the ECH4, but then I didn't use it.
The EL12s just had to be biased, once I found the correct transformer. The EBC3 was easy once I found out how to bias it.

[db56]

No capacitors between phase splitter and output tubes!?

[DeathRex]

Oops! I'll fix it.