No19 set fuses

[Bruce MacMillan]

Buss and Littelfuse are competitors that produce the same product. The Buss MBB is now called AGC, Littelfuse 3AG is now the 312 series. The high voltage is a fast blow (312) but the 10A is slow blow (313 series). Look closely and you can see a spring at one end of the fuse. This allows a higher inrush current than the actual rating.

[James D Teel II]

I’m having a devil of a time looking them up. Here they are in the order described.

[James D Teel II]

Oh, and my PSU is a 1943 Philco No.1. My apologies for not making that clear.

[James D Teel II]

Well. I found a NOS pack of the 5A 125v fuses, but am still looking for the one on the right.

[rob love]

As Bruce mentioned, the MBB series turned into the AGC series a long long time ago. The AGC is a 1/4" by 1-1/4 glass fast blow fuse. So what you are after is a Bussman or Eaton AGC 1/4A fuse.



Here is a link to a page where the fuse types are discussed and the mention made of the MBB type. https://www.galco.com/techdoc/buss/mbo-8_dat.pdf


Here is a link to the specific fuse on quesiton, but you will likely find them locally. They are not rare. https://www.allfuses.com/agc-1-4

[Chris Suslowicz]

Originally Posted by James D Teel II

Well. I found a NOS pack of the 5A 125v fuses, but am still looking for the one on the right.

But those are the wrong fuses!

For the HT1 and HT2 protection fuses you should be using 250mA quick-blow fuses only. (There are different designs and "the one on the right" is a very old type, probably no longer available.)

I have 6 bags of 10 fuses each at my elbow right now. DM me your address and I'll put a bag in the post to you next week.

Best regards,
Chris.

[James D Teel II]

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