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Old 1st June 2006, 07:05 AM   #1
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Default Need a milli-voltmeter

Hi I have been advised to check the Bias on my amp.

I need a millivolt meter than can help me set the bias to 7mV

Does anyone know where I can buy/rent/borrow one (I live in York England)

How precise do I need to get the BIAS? 7mv, 7.0mv 7.00mv etc etc
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Old 1st June 2006, 07:20 AM   #2
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mV units, like 6, 7, 8 mV. It's not critical. You can use a simple DMM with 200 mV range and 1999 in reading.
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Old 1st June 2006, 08:01 AM   #3
AndrewT is offline AndrewT  Scotland
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Hi,
you can buy a DMM for £2 upwards.

You do not need great accuracy, the DMM is likely to be better than +-1% on the DC scales, this is good enough.

You may want to invest in a meter that has a wide range of scales, which are still available cheaply, look at the AC, DC, ohms, scales and see what ranges are available to fit your budget.

If you take up electronics then you might want transistor hFE and capacitance and frequency. I would buy a second or even dedicated meter to carry out these extra functions.
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Old 1st June 2006, 12:15 PM   #4
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Hi,

admitting ignorance here. What is a DMM, where do you get it, and does it work like a volt meter?

Thanks
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Old 1st June 2006, 12:19 PM   #5
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just had a thought. does DMM = Digital Multi meter?

if so, where can you get one for £2?
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Old 1st June 2006, 12:21 PM   #6
Electrons are yellow and more is better!
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You can also go here:
http://acronymfinder.com/af-query.as...d&string=exact
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Old 1st June 2006, 04:49 PM   #7
AndrewT is offline AndrewT  Scotland
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Hi,
I bought a buy one get one free (bogof) for £5 at Maplin recently and donated them to my school. They were surprising good and fabulous value.
There are other special offers available.
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Old 8th June 2006, 12:08 PM   #8
ghg is offline ghg  Austria
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Peter, this one ought to be enough:

http://www.maplin.co.uk/Module.aspx?...meters&doy=8m6
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Old 8th June 2006, 05:06 PM   #9
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Yay found one.

digital home tester from maplins.
It does almost everything the DMM's do (and is more accurate). but they named it differently so when you searched DMM you wouldn't find it cos its only £7!

maplins are bastards sometimes.

but i got it and it works great.
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