Most are in the 3-5 amp range slow blow in some, charging caps and bringing transformers up. Valves may have more protection a second fuse fast blow on the bias circuit.
A Valve goes nutty on it's last turn on cycle, POP and hopefully the FB will pop too. .5 to 1 amp or something.. OR turn the bias up to quick when re biasing.. POP!
A Valve goes nutty on it's last turn on cycle, POP and hopefully the FB will pop too. .5 to 1 amp or something.. OR turn the bias up to quick when re biasing.. POP!