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Making a milliAmp meter, become a Volt meter
Making a milliAmp meter, become a Volt meter
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Old 26th May 2006, 01:43 AM   #11
redrabbit is offline redrabbit  Isle of Man
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Join Date: Oct 2004
WoW...thanks for the great suggestions. I have yet to research all of them.

It is a vintage Simpson, 0-100mA, no other writing on the face. It's has a bit of weight to it, if that adds to any speculation about it.
Yes, I will save this meter for a more elegant situation ; my need for a meter is to quickly measure volts and load for:

*4 variable PSUs (in a single box),
*up to 12v / 200mA.......to power guitar fx,
*using a three-position momentary switch on/off/on... (volts/off/milliamps)
*another rotary switch points to which supply output I want to adjust/check.

...the reason for the momentary switch is to keep the meter out of the circuit, except when needed.


BTW: Lackinnj....funny, I was just searching for Jfets today, at my local surplus store....2n5457......they didn't have any.
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Old 26th May 2006, 07:51 PM   #12
Stocker is offline Stocker  United States
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Join Date: Dec 2003
Location: Austin
World politics left aside for the moment, there are several companies producing low-cost panel meters that are getting down into the $20-$30 range IIRC. And for cheaper than that you can get a DMM from an auto parts store to mount and leave, dedicated, in-circuit.
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