Lucky wrote:

"Mark S. Holden" wrote in message
...
Lucky wrote:


By the way, do these fuse holders have a polarity where they need to be
soldered in line properly?
No of course not since you can put the fuse in the holder in either way
or
direction. Just figured I ask. I mean if you're not 100% sure but are 99
9/10% sure, why not close the gap on that 1/10th and ask eh?

Lucky

Not that it matters much, but I generally put the longer side of the fuse
holder
on the side that goes to the power supply because you're less likely to
have the
contact for the fuse touch something it shouldn't when it's unhooked for
changing.

Hiya Mark

Yes good thinking. I can see something like that happening after moving,
pulling or repositioning the cables. In fact,I'm going to put a tiny piece
of tape around the holder to seal it.

BTW, should the fuse be as close to the radio or PSU? I was going to put it
close to the PSU since that's where all the dangerous current can originate
from.


That's what I'd do.

1] But now I'm of the understanding I'm really protecting the PSU and it's
environment with this added fuse more then protecting the radio itself,
correct?


Well, if you got a big voltage spike, the fuse might blow before the radio, but
odds are the radio will blow to protect the fuse.

2] So if it's the radio that may cause the current failure drain, then the
fuse should be closer to the radio then the PSU correct?


No. If for example the wires between the PS and the radio got shorted between
the PS and the fuse, the fuse won't blow, and the wires will get nice and hot.

I decided to do all this to protect the radio from the PSU since I'm not
100% sure the PSU doesn't have any defects from perhaps lets say a fall. The
PSU could work perfectly but have a solder joint ready to break.

But I would have done this **anyway. This is my first experience with such a
powerfull power supply that can totally fry
any electrical component conected to it. It kinda intimidates me a little
compared to all the small low powered wall worts I'm used to

I have always put a failsafe in place in most aspects of my life. If I can
fit a level of added security in case the major one fails I'll do it.

Remember it's always better to be SAFE then SORRY.

Always happy to hear from you
Lucky

If you want to protect the radio, your best bet is probably to add some surge
protection - a 15v MOV hooked up on the radio side of the fuse might help blow
the fuse before the radio gets fried.