[Central-Electronics] MM-2 HV caps

[Dennis Petrich]

I had 3 of the 5 MM2 scopes I have had the .5uf cap short out but not the 1uf.

Sent from my iPhone

> On May 5, 2022, at 6:03 PM, Jon Kannegaard <k6jek at comcast.net> wrote:
> 
> They’re killing the transformers, those HV filter caps. Not mine, not yet, anyway, but I’ve heard of a few. The failure mode is a short with smoke.  They are humdinger caps,  paper and oil can caps rated at over a kilovolt. They are now over 60 years old.   Even humdinger caps can fail. I think it’s time to preemptively replace them.
> 
> But with what? They are 1 uF @ 1000V and .5 uF @1500V with unknown current specs. Mine are CDE. CDE still makes something similar. They aren’t cheap and may require some fiddling to mount them.  Are these the answer?
> 
> https://www.mouser.com/ProductDetail/Cornell-Dubilier-CDE/SCRN240R-F?qs=9I6i58cghusvBOSErkJytw%3D%3D
> ______________________________________________________________
> Central-Electronics mailing list
> Home: http://mailman.qth.net/mailman/listinfo/central-electronics
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Central-Electronics at mailman.qth.net
> 
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html