[Heathkit] IM-17 Question

[Bwana Bob]

That's true. Mercury batteries were used as  voltage references before 
precision Zener diodes became available.


						73,


						Bob WB2VUF

LeeCraner at aol.com wrote:
> I haven't been following this post so I don't know if it's been brought up 
> before, but the advantage of mercury batteries over other types is/was its 
> ability to maintain a constant voltage through its life.  An 8.4V battery put out 
> 8.4V until it was exhausted.  Of course, most other batteries' voltage will 
> drop over its useful life.
> 
> 73
> Lee WB6SSW
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