Henry,
Believe it or not, that was the way they did on one of those Radio Shack meters
similar to a Simpson 260. The shunt was a bent piece of nichrome wire around
the inside of the meter. Towards the end they soldered a wire on it for the
ammeter. You could see where they had tried another spot just about 3/16" away.
Worked ok for them!
Best,
Will
*********** REPLY SEPARATOR ***********
On 2/3/06 at 10:40 PM Henry Pfizenmayer wrote:
>You might also try Rich Measures - r@somis.org., I used some of his
>nichrome parasitic supressor wire to make some low value resistors - one
>big
>problem is contact resistance variation as you have probably already
>found
>and you can use his solder to ease that problem a bit . Another trick I
>used
>was to make the shunt a little too large the use one end as common and
>then
>slide the meter lead along the nichrome wire until the meter read what I
>wanted and soldered the wire there .
>
>Hank K7HP
>
>
>----- Original Message -----
>From: "Will Matney" <craxd1@verizon.net>
>To: <amps@contesting.com>
>Sent: Friday, February 03, 2006 9:58 PM
>Subject: Re: [Amps] Needed: Easy to Wind Low Value Meter Shunt Wire
>
>
>> Ron,
>>
>> Yes there is as I just saw them in Mouser. I forget the manufacturer but
>> they'll be under resistors. Shunts like a 0.1 ohm or lower are hard to
>> make and be accurate.
>>
>> Best,
>>
>> Will
>>
>> *********** REPLY SEPARATOR ***********
>>
>> On 2/3/06 at 11:52 PM w2cqm@juno.com wrote:
>>
>>>Hopefully, someone can suggest an easy technique to wire meter shunts in
>>>fractional parts of an ohm. I just spent some tedious, cut and try time
>>>finally getting a 1 ma meter to read 1 amp of plate current using an
>>>oddball combination of four (4) sand type mini value resistors in
>>>parallel. It's cumbersome, works OK, but looks awful. Is there a
>>>retail supplier of low value nichrome type resistance wire (per linear
>>>length) that allows for the quick calculation and fabrication of meter
>>>shunts within a range of fractional parts of an ohm? (e.g., .04-.05
>>>ohms) Any help would be appreciated. Thanks, Ron W2CQM/3
>>>_______________________________________________
>>>Amps mailing list
>>>Amps@contesting.com
>>>http://lists.contesting.com/mailman/listinfo/amps
>>
>>
>>
>> _______________________________________________
>> Amps mailing list
>> Amps@contesting.com
>> http://lists.contesting.com/mailman/listinfo/amps
>>
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