Here's a picture of the original Filter cap and the replacement I bought from Digi-Key. The original is a 16uf 63V B.P. cap. I could not find an exact match so went with the closest which was a 10uf 63V B.P. but as you can see from the pic it's a LOT smaller. This has got me thinking that perhaps I did not buy the correct one. I read somewhere that a 10uf was a suitable replacement for this cap. Does anyone have any advice on this one?
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I'm sorry I missed this old thread, but there are still some points to make that might prevent others from digging a grave for the VDU:
The size disparity is there because the two capacitors are in no way interchangeable, if you put that small part in there, due to its much higher ESR it would overheat and burst its guts.
It is not a "filter cap" it is a coupling cap.
It is worth doing some research on how CRT VDU's work, their H and V scanning systems, before undertaking any repairs. Read up on energy recovery scanning.
The original 16uF bipolar capacitor is a very special part and is nothing at all like any bipolar electrolytic or any other electrolytic you can buy from any supplier. It is likely fine too, and doesn't suffer the general fate of old electrolytics,
Generally these are the horizontal yoke coupling capacitors. They form part of the S correction linearity function (look that up) to assure good H scan linearity and they block DC from the H yoke scanning coils. They have an extremely low ESR in the order of 0.1 Ohms. The peak currents in this circuit are as high as 3 amps.
They can be replaced with a film capacitor, generally a 100 to to 250V rated one of the same capacitance, as I say, likely the original is just fine. Like this for example:
LOT OF 2 MPE2S-16.0-100-10 SOUTHERN ELECTRONICS / F-DYNE capacitor. SOUTHERN ELECTRONICS / F-DYNE. MANUFACTURER: SOUTHERN ELECTRONICS / F-DYNE.
www.ebay.com
The thing is that you get this generalized advice on the internet about replacing electrolytic caps in "everything". But, the people who are saying this make global non-specific recommendations. So a lot of folks following this (like sheep) apply that to all the capacitors that look like electrolytic capacitors that they see, in the hopes of fixing their broken machines. And as a result they can get themselves into a real pickle.
The better move is to ignore you tube videos, buy some books on CRT's and VDU technology, read those, understand how and why things work (when they do) and move on from there to figure out what to do when they don't work.