Home » VintageKustom.com » Replacement Part Suggestions » help to identify proper 250v slow blow AC fuse for 72 coupe? (needing spec confirmation.)
help to identify proper 250v slow blow AC fuse for 72 coupe? [message #26779] Sun, 01 July 2018 23:17 Go to next message
MaceHathaway is currently offline  MaceHathaway
Messages: 1
Registered: July 2018
Junior Member
Picked up a Kustom 72 Coupe on the cheap,it is missing the fuse in the AC plug...I know it is 250v,marked on the outside of the fuse holder..and slow blow,or time release,but that is all I can figure out. Can anyone tell me how many amps this fuse would be?? 3a?...4a?...5a?, and I also am not sure how long...20mm seems too short...22mm?
Thanks for the help. Would sure love to hear this amp!
Been searching the net with no luck. Thanks in adnavce for the help!-Mace
Re: help to identify proper 250v slow blow AC fuse for 72 coupe? [message #26780 is a reply to message #26779] Mon, 02 July 2018 08:00 Go to previous message
stevem is currently offline  stevem
Messages: 4064
Registered: June 2004
Location: NY
Senior Member
The proper fuse for your amp would be a Littlefuse type 218 series 5 x 20mm in the amperage stated on the back of the amp.
A fuse like this can be had from Newark electronics part number 26k8060 for a 4 amp fuse.
One thing to note hear is that a fuse in a tube type amp does not blow out for no reason, you likely have a bad output tube that took the fuse out in the first place!
The way to check this if you choose to not take it to a tech is to pull all of the output tubes out , install a new fuse and then re-install the output tubes one by one until the fuse blows again , then you have found the bad tube.
This of course means you will need a hand full of new fuses to test with.
In a pinch you can use a fast blow type fuse rated at 1 amp more then what the amp calls for in a slow blow type fuse.
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