DC 1.2V-37V LM317 Adjustable Regulated Soft Start Power for 6.3v 12.6v Filament
Description:

Tube Amp Amplifier filament LM317 adjustable voltage regulator with soft start circuit boards , it also can be used in vacuum tube amp negative grid bias power adjustment: High quality double-sided PCB solder, thick copper, small ripple factor of the line, before guts for pole / tube filament results are satisfactory. PCB fixing holes left corners, small volume assembly.

Tube filament with, just getting machine is powered on, the voltage from 0V to 6.3V or 12.6V, tube filament slowly increased from cold low resistance, to avoid the impact of the tube voltage jump mutation, protection extend tube life.
 
7.5V ~ 13V AC power supply, DC 1.2V ~ 12.6V voltage adjustable, 1 ~ 1.5A current output.
hu0307-6 
You can also exchange 5V ~ 32V AC power supply, 1.2V ~ 37V DC voltage adjustable, 1 ~ 1.5A current output. 
 hu0307-5
Imported 6A full-bridge rectifier, Nissan or import 1000μ50V filter, LM317 adjustable voltage regulator, Philips or import 680μ50V secondary filter.
 
The board will take the connection: two lead AC voltage inputs, two lead DC voltage output.
 
Size: 63 × 45mm.
 
Package Included:
 
1 x Tube Filament Regulated Power Supply Board
 
 
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