[GreenKeys] Rectifier voltage question...

[Jeffrey Angus]

On 9/19/19 10:32 AM, Dave Wade wrote:
> I admit one issue here is that in reality you have little idea
> what the original ESR or capacitance value was.
> The typical tolerance was +50%/-100% so if it reforms to 60% of
> its original value is that OK?
Actually, typical tolerance was -20% to + 80%.
So, 60% is well below the original specified value.
> Did any one quote the ESR on such old devices?
They didn't measure ESR back then.
The unit used was D. Dissipation Factor.
About 1/2 way down the page.
<https://www.instructables.com/id/Measuring-Capacitor-Health-tan-%CE%B4-vs-ESR/> 

> I work on a 20 year old valve computer which is a replica of a
> 1948 model.
I service "vintage" radios from the '30s to the early '60s.
EVERYONE of them had to have the electrolytic capacitors
replaced.


-- 
"I am a river to my people."
Jeff-1.0
WA6FWI
www.foxsmercantile.com