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Old 7th Jun 2016, 9:47 pm   #45
TonyDuell
Dekatron
 
Join Date: Jun 2015
Location: Biggin Hill, London, UK.
Posts: 5,188
Default Re: Amazing D cell discovery!

Many a true word is spoken in jest

Some years ago when I was designing an amplifer for very small signals and was having problems with noise (what a surprise) I (temporarily) powered the first op-amp stage off a couple of those 12V 'car fob' batteries just to elimate the power supply as a noise source (that was not the problem but I did want to make sure).
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