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Subject:
From:
Pat Byrne <[log in to unmask]>
Reply To:
For blind ham radio operators <[log in to unmask]>
Date:
Tue, 22 May 2012 08:12:32 -0500
Content-Type:
text/plain
Parts/Attachments:
text/plain (133 lines)
That's the second version of what Steve sent along and they 
agree!!  Thanks howard; old guys can still learn!!  How was 
Dayton?  I had planned to go but for various reasons wound up taking 
a pass.  Next year!!
patAt 07:03 AM 5/22/2012, you wrote:
>Hi Pat,
>
>About the voltage rating on fuses,
>
>As I understand it.  When a fuse blows (opens), a gap is left between the
>ends of the fuse.  So for example, a fuse rated at 250 volts would require a
>voltage in excess of 250 volts to jump the gap left by the blown fuse.
>
>This is why you would not want to put an automotive fuse rated at 32 volts
>in a 120 volt circuit but you could put a fuse rated at 250 in a 12 volt
>circuit without a problem.
>
>I hope this is not too confusing.
>
>73's
>
>Howard #3,
>W A 9 Y B W
>
>----- Original Message -----
>From: "Pat Byrne" <[log in to unmask]>
>To: <[log in to unmask]>
>Sent: Monday, May 21, 2012 8:02 AM
>Subject: Re: need source for 12-amp round AGC fuses
>
>
> >I have always been confused by current/voltage fuse ratings.  One amp
> > at 12 volts is 12 watts.  1 amp at 220 volts is a whole lot more.  Or
> > is an amp just an amp regardless of fuse voltage ratings?  I'm
> > guessing that is how it works and seemingly a ham rig would have a 12
> > volt rated fuse.
> > thanks for helping this old guy's confusion!!
> > pat, K9JAUAt 05:48 AM 5/21/2012, you wrote:
> >>     Howard:
> >>
> >>I believe the fuse is a 250-volt AGC fast-blow fuse with the standard
> >>length
> >>and diameter you suggest, but will doublecheck.
> >>
> >>I'll also check at Walmarts, Radio Shack, and our local auto supply store
> >>here in town to see if they already have them.
> >>
> >>If I have no luck, I'll contact you for that Amazon.com link.
> >>
> >>Thanks for all of the help.
> >>
> >>73 from Tom Behler: KB8TYJ
> >>
> >>----- Original Message -----
> >>From: "Howard, W A 9 Y B W" <[log in to unmask]>
> >>To: <[log in to unmask]>
> >>Sent: Sunday, May 20, 2012 10:26 PM
> >>Subject: Re: need source for 12-amp round AGC fuses
> >>
> >>
> >> > Tom,
> >> >
> >> > are these fuses fast blow or slow blow?
> >> >
> >> > I would guess fast blow.
> >> >
> >> > Also are they 250 volts?
> >> >
> >> > The voltage is written on the fuse.  Just because they are used in a 12
> >> > volt
> >> > application doesn't necessarily mean that they are not rated for 250
> >> > volts.
> >> > You need to go by what is written on the fuse assuming the one in there
> >> > is
> >> > the original.
> >> >
> >> > Also, I believe a 3AG type is the same thing if you can't actually find
> >> > a
> >> > AGC type.
> >> >
> >> > So I know what you have, is this fuse one fourth inch in diameter and 1
> >> > and
> >> > one fourth inches long?
> >> >
> >> > I found these for $1.39 for a box of 5 at Amazon.
> >> >
> >> > If this is what you want I will send you the link.
> >> >
> >> > 73's
> >> >
> >> > Howard #3, W A 9 Y B W
> >> >
> >> >
> >> >
> >> >
> >> >
> >> > ----- Original Message -----
> >> > From: "Tom Behler" <[log in to unmask]>
> >> > To: <[log in to unmask]>
> >> > Sent: Sunday, May 20, 2012 7:49 PM
> >> > Subject: need source for 12-amp round AGC fuses
> >> >
> >> >
> >> >> Hi, again, everyone.
> >> >>
> >> >> This week-end, I put the Tentech Scout that I bought from the recent
> >> >> estate
> >> >> sale on the air.  Made a 20-meter SSB contact to a special event
> >> >> station
> >> >> in
> >> >> Long Island New York.  He gave me a 5 by 7, which isn't bad
> >> >> considering
> >> >> the
> >> >> maximum output power for the Scout is 50 watts.
> >> >>
> >> >> Anyway, in looking over the Scout, I notice that it requires a 12-amp
> >> >> round
> >> >> AGC fuse in the positive lead of the DC power cord.  I have 10 and
> >> >> 15-amp
> >> >> fuses here, but no 12-ampers, which I believe will be hard to come by.
> >> >>
> >> >> I certainly wouldn't want to put a 15-amp fuse in there, but could go
> >> >> with
> >> >> a
> >> >> 10-amper, if needed at least in a pinch.
> >> >>
> >> >> If anyone knows of a good source of 12-amp AGC round fuses, please let
> >> >> me
> >> >> know.
> >> >>
> >> >> 73 from Tom Behler: KB8TYJ
> >> >

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