Classic Hifi Care

I've got a little Universal Enterprises analog multimeter, model M30. It has a fuse in the ohmmeter/continuity (buzzer) circuit, which uses a single AA cell. The fuse is a little glass fuse, the ca. 1/2 inch size. The fuse burned out long ago and I wrapped it with aluminum foil. That's unreliable as well as poor engineering. I had to replace the foil tonight (it's thin and easily disturbed). This is not my main device; it's one that rides in my portable mechanic's tool box.

Checking online, one source was willing to sell me the fuse for $20. Fat chance, as we say. But it did call it a 1/2 amp fuse for this unit.

That seems a bit hefty for ohmmeter service, but then if we assume a dead short, 1/2 amp at 1.5 V is .75 watts. Not sure what the little continuity buzzer draws.

Does 1/2 amp for an analog meter sound about right? (Probably better than aluminum foil, in any event).

Chris Campbell

The size is like the fuses they use in christmas lights.
They have them in the plug..

I know what the physical size is--bigger in diameter than the Xmas light fuses--but amp rating?

Chris Campbell

I checked some of my fuses and the small fuses measure .205" X .775". Any chance that they'll work?

https://www.kalnexo.com/product/uei-af3 ... -o-3-pack/

I wonder how may they sold

So its 0.5 amp at 0.5 ohm
Maybe send info the littelfuse se if they made a sub

https://www.ebay.com/itm/126955997132

I can get fuses. What I'm wondering about is its value. One of the online sellers (way overpriced for a standard glass fuse) said it was 1/2 amp. Sounded a bit high, but as I noted, that's 0.75 watts. The fuse is in series with the ohmmeter function and the continuity (buzzer) function only. Maybe the little buzzer draws enough current to need a 1/2 amp fuse.

Chris Campbell

https://www.ueitest.com/ECommerce/product/af3/af3
Idk
But there site states that fuse
Gb uses simular physical size as pictured