[TowerTalk] Measurement errors and power line taps. Was, AL-80 Power Taps...

[Martin AA6E]

Agreed.  If you truly want +/- 5% RMS to save your tube filaments, 
(that's the critical thing) your typical cheap VOM does not measure RMS 
and is not too accurate at what it does measure.

Fortunately, my amp PS doesn't have any taps, so I don't have to worry. 
My policy is not to turn the thing on very often. ;-)

73 Martin AA6E

Jim Jarvis wrote:
> TT:
> 
...
> 
> The DMM he's using probably has an AC accuracy of +/- 3-5%.
> That is, +/- 7-12V error @ 240V.  We're discussing power grid variations
> of between 0.8 and 3%....  Anybody see a disconnect here?
>