I've blown the pico fuse under the bnc antenna connector.

Will this one do ??



If someone has the exact replacement details? and from who---that would be a great help!
tnx/73
Jerry VE3EXT

Jerry,
That fuse should work just fine. Your choice of the very fast acting style is the correct series for the antenna input fuse.

I think that is a very fair price for 5 of them.

Joe - WA7JAW

While the Picofuse is what everybody recommends, take a look at the outside diameter of the fuse, then measure the inside diameter of the hole in the back of the BNC connector to verify that it will actually fit. I think you'll find that the hole in the BNC is under 0.1 inches while the fuses are over 0.1 inches.

There are other fuses that are a bit smaller that might fit better.

Rick your pic/info re the fuse didn't come thru---could you try again please?
tnx
73
Jerry VE3EXT

开云体育

?Rick your pic/info re the fuse didn't come thru---could you try again please?
tnx
73
Jerry VE3EXT

开云体育

The link worked fine for me.

Chuck

The Littelfuse 275.062 or 0275.062 are 1/16a and have the clear tubing over them. In a pinch you could use 1/8a (275.125 or 0275.125) but the lower the current, the less damage you'll do to your R2001D front end.

BIG OOPS. I had searched for 275 series, which is the wrong series. I meant to search for 265 series. So disregard my previous post. The 275 series is way too big in diameter. They look just like the 265 though.

Sorry.

If you try using one of the green coated ones (type 251) in a D series it will jam in.
It will in all likely hood scrape off enough of the green coating to expose the end metal end cap connection grounding your input.
A little signal will get through but not much.

Jim got it correct.

The smaller clear shrink are the only ones that will work.
NOS is about it.
Type 275 or 276 (a 275 with kinked ends you need to straighten)
Some of the (current ?)? littlefuse sheets still list the 1/16A or 1/8A (MAX) and others do not list anything close to that low.
Minimum order seems to be manufacturing quantities and no guarantee that new ones will be the same size.

Bob mentioned measuring hole size.? You will need a set of wire drills and dial calipers or a micrometer.
Use extreme caution.
Look into the holes where the fuse ends go and note the wire connector made with 4 tiny gold plated petals.

When you trim the new fuse ends, break the point and edges with a jewelers file or something of that idea.
The recommended cut at 45 or so degrees leaves a sharp point that can catch behind one of the petals and destroy it.

Inserting the fuse in the close fitting connector will guide the wire into the female connection

Clarification of my inclusion of 275 series NOS ONLY.? Low current only.
Currently available 275 series are ONLY 20 to 30A and 32V rated.? Specified at 0.133"

Old cut sheets for the 275 listed 2 separate diameters depending on current rating.

The 275 1/2A were used to learn the cut and fit before using a 1/8A.? Marked with LF logo and 1/2A

The 1/8A one pictured 0.087 was obtained from an auction site.
The seller said they were OLD original Picofuses and when ask said 275 series.? He quoted 0.085" diameter.
They have only 2 markings.? The LF logo and 1/8A

The current 265 /266 (bent lead) / 267(mil spec) series are 0.093" on the cut sheet..
I have not found them in less than manufacturing quantities.? I forget but around 5K pieces

I also have 251 series (Also green epoxy coat) 1/16A that measure 0.096 to 97"? The cut sheet quotes 0.11"? They are later manufacure as they are in a "Cigar" type tube instead of a box.? Marked LF logo and 1/16A

I haven't found a way to edit a post.

The 2007 Allied catalog lists the series 251 as a diameter of 0.095.
Lead diameter 1/16 to 10A 0.025 and 12 to 15A 0.032

The current series 251 are fatter.than to old ones

The 251 I measured for the previous post is al lest 30 years old.