Long Overdue SE Build

[lordglum]

Long Overdue SE Build need help troubleshooting

So this is about 10 years in the making. This was a 2A3 that is about 10 years old.

Edcore Power
Electraprint TM3Kb outputs
Maple/Walnut base
Aluminum top plate

The wife picked out the blue color for me on the trannies. Hoping to have this done in a couple months.

Painted w/spay cans.

Thanks,
Jeremy

 

[lordglum]

More pics....

Need to attach, fine sand and rub the mirror finish on the base.
Install the board
run my wires and wire the jumpers.
I am running jumpers to the main top plate since I want the rectifier and 300B tubes mounted to the top plate.

 

[wdecho]

I am looking forward to more pictures and descriptions of your build. I am in the process of building one myself and would like some ideas on how to make the board integrate into a nice a case. Looking good so far.

 

[lordglum]

Made some progress a year later.
Working to finish the tranny wiring.

 

[lordglum]

So after 2 years I started work on this again. 1st step is refreshing my memory and my notes on where I left off. I’m almost ready for initial checkout.

 

[lordglum]

Under the hood....

 

[devour]

Coming soon!

An externally hosted image should be here but it was not working when we last tested it.

moto x3m

 

[Cool Hand Luke]

The case looks really good there lordglum.

Is that a mill that you used to cut the top plate?

 

[lordglum]

Thanks for the kind words.

We did use a mill for the vertical lines on the top plate.
Everything else was done by hand and hole punches.

 

[sunil]

Made some progress a year later.
Working to finish the tranny wiring.

View attachment 715878

View attachment 715879

View attachment 715880

Nice looking layout. Please finish it.

 

[lordglum]

Thanks for the comments. I’m actually planning to get it done. It has been hanging over my head for almost 15 years when it started life as a 2A3.

 

[lordglum]

It’s alive!

First power up specs no tubes.
B- @260v
B+ @ .69v
Filament @4.98v

Slight hum in the chassis but at least no smoke.

 

[lordglum]

Rectified installed.
B+@ 445
B-@260
Filament @4.98

 

[lordglum]

-116v on left channel
-107 on right channel

Done for the night will install the 5842 tomorrow.

 

[lordglum]

No 5842 installed:
B+ 445v
R/L channel coupling cap 138v

5842 installed
B+ 445v
R/L coupling cap 10v no change using the potentiometer.
Any ideas why voltage is low and won’t change?

 

[lordglum]

Trying to add picture.