Details：

New and improved version, adding filament suspension circuit, better circuit performance, overall improvement of signal-to-noise ratio and tube's life.

The board with 45 seconds audio delay

BC Audio Capacitor

PCB Size:220mm x 133mm

Tube Model : 2PC 12AU7 /ECC82

Works volage:

AC1---High voltage：0-AC280V (0.1A)

AC2---filament：0-AC9V (2.5A)

AC3-- delay：0-AC8V (0.5A)

Suitable transformer link：

https://www.ebay.com/itm/353555003773

https://www.ebay.com/itm/353126807151

Note：

Diy Kit 1：as the picture show ，not included all capacitances and tubes ！

Diy Kit 2 :as the picture show ，all parts need buyer to solder it ,(not included tubes) 470uf 64V cap is used ！

Assembled Board:have tested it well ,(not included tubes) 470uf 64V cap is used ！