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From: Pieyed Piper on 27 Jun 2010 01:56
On Sat, 26 Jun 2010 22:09:36 -0700, John Larkin
<jjlarkin(a)highNOTlandTHIStechnologyPART.com> wrote:

>On Sat, 26 Jun 2010 21:56:44 -0700, Salmon Egg
><SalmonEgg(a)sbcglobal.net> wrote:
>
>>In article
>><0001HW.C84C25A9011554E5B01AD9AF(a)news.eternal-september.org>,
>> DaveC <invalid(a)invalid.net> wrote:
>>
>>> Used in the battery (-) lead of a handheld scope. Schematics unpublished.
>>>
>>> Physically similar to a 1/4 W resistor, color light green. Marked "IE7A" or
>>> "1E7A".
>>>
>>> Google returns slim results, none promising.
>>>
>>> What type is this?
>>>
>>> Thanks,
>>> Dave
>>
>>USE COMPLETE SENTENCES!
>
>Idiot
>^^^^^ Not a complete sentence
> ^^^^^^^^^^^^^^^^^^^^^^^ Not a complete sentence
>
>Etc.
>
>John
>

I should have figured that not a goddamned soul actually tried to answer
the question.

It sounds like a 'soft-fuze'. That resets itself after tripping.

There is also a similar device used in hair dryer circuitry.
From: Phil Allison on 27 Jun 2010 02:34

"DaveC" <

> Used in the battery (-) lead of a handheld scope. Schematics unpublished.
>
> Physically similar to a 1/4 W resistor, color light green. Marked "IE7A"
> or
> "1E7A".


** Sounds like a Pico Fuse:

http://media.digikey.com/photos/Littelfuse%20Photos/PICO%20II%20R251%20SERIES.jpg

Come in fast and very fast ratings with amps rated from 1A to about 15A.

When they blow, you need a soldering iron to replace them.

There are various Asians clones too.


...... Phil



From: Phil Allison on 27 Jun 2010 02:50

"DaveC"

> Physically similar to a 1/4 W resistor, color light green. Marked "IE7A"
> or
> "1E7A".


** Sure that is not the other way around ?

Pico Fuse would use " 7A LE " as a the marking for a 7 amp fuse.



..... Phil



From: N_Cook on 27 Jun 2010 02:51
DaveC <invalid(a)invalid.net> wrote in message
news:0001HW.C84C25A9011554E5B01AD9AF(a)news.eternal-september.org...
> Used in the battery (-) lead of a handheld scope. Schematics unpublished.
>
> Physically similar to a 1/4 W resistor, color light green. Marked "IE7A"
or
> "1E7A".
>
> Google returns slim results, none promising.
>
> What type is this?
>
> Thanks,
> Dave
>


I take it , that its blown and I also take it that its not charred (fusible
R don't char or even discolour AFAIK)
Desolder it and scrape an axial line along its length . Then DVM resistance
check from either end. If a fusible resistor then maximum R read is what its
value was near enough.
FR breaks are usually to one end, normal R usually in the middle.
Although green is often axial inductor.

--
Diverse Devices, Southampton, England
electronic hints and repair briefs , schematics/manuals list on
http://diverse.4mg.com/index.htm


From: DaveC on 27 Jun 2010 03:27
> I take it , that its blown and I also take it that its not charred (fusible
> R don't char or even discolour AFAIK)

No, I don't have one. I threw it out with the old battery. :-(
Someone on-line volunteered to describe the one from his scope.
I'll not ask him to do a post-mortem on a working fuse. ;-)

Thanks,
Dave

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