Projects for next hollidays (the world smallest VBITNGC??)

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What kind/brand of socket is intended?

I attach a foto of a suitable socket. It is a ceramic type, 17.5mm diameter for the pins.

Just remove the center tap.

Kind regards
Franz
 

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Uuups, I just remarked on the picture:

On the small board, it is printed +6.3V and -6.3V for the tube filament voltage.

Of course, this is the same error, I made drawing the schematics, the ECC88's need 6.3V to heat the filament.

The correct printing would be +6.3V and GND.

I am very sorry!
Franz
 
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