[Amps] Powering up a linear after years of non use

[Iain]

Good afternoon All

 

I have recently acquired a 4cx250B linear from Frontier Electronics LA-2
2metre Linear Amp.

It hasn't had any volts on it for years.

 

I have a large mains variac that I use to run up my homebrew stuff but how
should I use it to run up this old linear...should I disconnect all the
supplies to the valve first ?

what sort of mains supply voltage should I start at and how long should I
take before I get it up to our 240vac mains input ?

 

Tnx in anticipation

Iain G4DPF