which screwdrivers do i need for bias?

shadow070

Member
A quick question:
Which screwdrivers do i need to bias my Herbert with external bias points? both flathead and crosshead? and if possible also the size.

I couldn't find any info online, its been 5 years or so since i last did it, im at work and expecting my tubes today so i want to have everything once im at home :D

Thanks for the help,

Robert
 
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