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previous: Jason Borders I have a Vox AC-50 that uses a 3 am... -- 3/16/1998 7:33 AM

Re: Fuses

3/16/1998 11:43 AM
Doc	Re: Fuses My experience is, if the circuit takes a slo-blow fuse it will be printed next to the fuse holder. Otherwise, if it says 3AG or just the amp rating, it is understood to mean standard fast blow. Always use a fast blow fuse in the B+. They're supposed to save your output transformer. Slow blow fuses are good where short duration overcurrent transients, or surges, would cause unnecessary "nuisance trips". Surges at turn-on can temporarily draw extra current, and are considered normal. These temporary overcurrents could look like a short circuit to a fast blow fuse if it was sized too close to the normal steady-state operating current draw. All fuses have a current vs. time curve. Slo-blo fuses will withstand an overcurrent for a longer period of time without opening than a fast blow type. Doc

3/16/1998 11:43 AM

Doc

Re: Fuses

My experience is, if the circuit takes a slo-blow fuse it will be printed next to the fuse holder. Otherwise, if it says 3AG or just the amp rating, it is understood to mean standard fast blow.

Always use a fast blow fuse in the B+. They're supposed to save your output transformer.

Slow blow fuses are good where short duration overcurrent transients, or surges, would cause unnecessary "nuisance trips". Surges at turn-on can temporarily draw extra current, and are considered normal. These temporary overcurrents could look like a short circuit to a fast blow fuse if it was sized too close to the normal steady-state operating current draw.

All fuses have a current vs. time curve. Slo-blo fuses will withstand an overcurrent for a longer period of time without opening than a fast blow type.

Doc

Replies:

Derrick Re: Fuses/ In a MARSHALL PLEXI -- 3/17/1998 10:18 AM