20 replies to this topic

[Kevin J]

I have never seen those in my searches, but what were their names, I will look them up, also you might need a pyrotechncs license to purchase it.
Will try though,
thanks.

[lew]

Cool. I like the idea of A cheap PIC substitute.

I still have about 20 meters of PIC left for personal use, mostly reserved for underwater work, but hopefully, this PTFE wrapped visco will make my remaining PIC last for a very long time.

I Will try some tommorow.

[leosedf]

Why not use this http://www.frogfot.c...ro.html#silicfu KMnO4 fuse and pass it thru heat shrink tubing (something like PIC fuse)?
Heat shrink tubing needs about 100C to shrink, is it going to set the fuse off?



-----------------EDIT-----------------
Ooops! Sorry my mistake , they do NOT burn underwater!
But heatshrink tubing seems a good idea.

Edited by leosedf, 04 August 2006 - 04:16 PM.

[adamw]

Hmmm... permanganate again! Do you know that it can spontaneously ignite... that's not much good as a fuse!

[Give_me_APCP]

Why not use this http://www.frogfot.c...ro.html#silicfu KMnO4 fuse and pass it thru heat shrink tubing (something like PIC fuse)?
Heat shrink tubing needs about 100C to shrink, is it going to set the fuse off?
-----------------EDIT-----------------
Ooops! Sorry my mistake , they do NOT burn underwater!
But heatshrink tubing seems a good idea.

Just use the PTFE. I promise you, you will not ever think of trying another idea again for underwater fuse. It is just so simple and cheap, there's no reason not to use it.

[lew]

Just a quick update.

I tried the PTFE wrapped visco today and it worked a treat.

I did a tight 50% overlap on each turn and tested a 10 inch length.

It burned underwater no problem with a slight increase in burn speed. Before ignition, I bent and twisted it many times to create weak spots, but this made no difference at all. I would say this is a very good cheap alternative to PIC.

I give it two thumbs up!