Wurlitzer Lric M 1964 verstarker frage- Amp question!

Hello!

Can someone help me with the following question?

On the left side of the amplifier in my Wurlitzer Lyric there are two fuses- labelled:

Si 3- 6A

and


Si 2- 0.3 A

and my amplifier stopped working today. The fuse in the 0.3A was in fact 0.4A and had blown.

What exactly does this fuse protect? Is 0.4A a satisfactory replacement, and does it being blown explain the lack of sound???

Many thanks indeed

Morgan in Luxembourg

Hi Morgan!
This Fuse is for the high Voltage for the tubes. Maybe the next after the Fuse is the Rectifier and
this one is defect, or one of the following Electrolytic Capacitors have a short Circuit.
Best Regards Willi!