Need help identifying old capacitors

[68krazy]

Hello everyone –

I am in the middle of restoring an old Macintosh all-in-one computer from the early 90s. It has a built-in Trinitron CRT monitor, and I am currently focused on rebuilding the analog board that drives it. The analog board is a combination of two power supplies and all the electronics that drive the CRT.

I have just finished replacing all electrolytic capacitors with brand new Nichicon, and now I would like to replace the three rectangular baby-blue colored caps that can be seen in this picture:



I am not sure what type of capacitor these are or how to read the values. They are “Evox” brand, and these are the codes written on top:

.0082H1600

1.8J160

2.2J160

I also need help finding a replacement for this bad boy:



I am hoping to order exact replacements from Digi-Key. If anybody could help me crack these codes, or point me a to good website that will help me do so, I would really appreciate it. If you are into this sort of thing, here is my thread on another forum detailing my restoration of the old Mac:

https://68kmla.org/forums/index.php?...2sd-for-lc550/

Cheers!

[budm]

Re: Need help identifying old capacitors

RIFA PME 290: X/Y Safety cap.

Any side marking on those blue caps? .0082uF 5% 1600V, 1.8uF 5% 160V, 2.2uF 5% 160V?
Do you happen to have the diagram for the board then you may be able to tell what kind of film caps for those blue caps have to be?

[68krazy]

Re: Need help identifying old capacitors

There are indeed side markings on those capacitors, here they are:

Capacitor 1:
Top Markings: .0082H1600
Side markings: PSR, EVOX, 9321

Capacitor 2:
Top Markings: 1.8J160
Side markings: FMR, EVOX, ???? (can't read the four numbers, can desolder part if needed)

Capacitor 3:
Top Markings:2.2J160
Side markings: PMR, EVOX, 9321

I have tried finding a schematic for the board, but no luck so far.

[budm]

Re: Need help identifying old capacitors

EVOX RIFA is now owned by KEMET.
http://www.kemet.com/welcome?domain=evoxrifa.com

[budm]

Re: Need help identifying old capacitors

EVOX RIFA PMR, PSR caps.
You can E-MAIL KEMET or DIGIKEY to get the sub for them.

Capacitor 2:
Top Markings: 1.8J160
Side markings: FMR, EVOX, ???? (can't read the four numbers, can desolder part if needed).

BTW, can you verify that it is 'FMR'? not PMR? More likely to be PMR also.

[68krazy]

Re: Need help identifying old capacitors

Any idea what capacitance the X/Y safety cap might be? I am guessing it is "10n", but I don't know what that means.

I also can't find any exact replacements for the baby blue caps, do you think if I up the voltage rating it will be OK?

[budm]

Re: Need help identifying old capacitors

Any idea what capacitance the X/Y safety cap might be? I am guessing it is "10n", but I don't know what that means.

I also can't find any exact replacements for the baby blue caps, do you think if I up the voltage rating it will be OK?

http://www.justradios.com/uFnFpF.html

10nF = 0.01uF. I would use PANASONIC ECQUL series X/Y caps.

I would contact DIGIKEY or KEMET to see what they have for the EVOX RIFA subs.
Higher Voltage rating will be fine (as long as it will still fit into the board) but the type of cap is very important,

[68krazy]

Re: Need help identifying old capacitors

And I'll email Digi-Key. I had no idea you could do that.

Thanks for replying by the way, I really appreciate your help!

[68krazy]

Re: Need help identifying old capacitors

EVOX RIFA PMR, PSR caps.
You can E-MAIL KEMET or DIGIKEY to get the sub for them.

Capacitor 2:
Top Markings: 1.8J160
Side markings: FMR, EVOX, ???? (can't read the four numbers, can desolder part if needed).

BTW, can you verify that it is 'FMR'? not PMR? More likely to be PMR also.

You are correct, the marking is actually PMR.

[68krazy]

Re: Need help identifying old capacitors

Alright, so I heard back from Digi-Key and they just directed me to film caps. I also heard back from Kemet but they just directed me to a local sales rep.

After wandering around both Digi-Key and Mouser, my best educated guess is that the type of capacitor I need is Film, Polypropylene, High Pulse. Here are my proposed replacements:

Capacitor 1:
Top Markings: .0082H1600
Side markings: PSR, EVOX, 9321
Lead spacing: 15mm
Proposed replacement:http://www.digikey.com/scripts/DkSea...31366658759456

Capacitor 2:
Top Markings: 1.8J160
Side markings: PMR, EVOX, 9325
Lead spacing: 22mm
Proposed replacement:http://www.mouser.com/Search/Product...F461DM185F250L

Capacitor 3:
Top Markings:2.2J160
Side markings: PMR, EVOX, 9321
Lead spacing: 22mm
Proposed replacement:http://www.mouser.com/Search/Product...426HD7220JR6L2

Rifa Safety Cap:
Proposed replacement:http://www.mouser.com/ProductDetail/...PMGbcM0Q%3d%3d
(I wasn't able to find the corresponding Panasonic ECQUL part)

When you get a chance, could you let me know if you think these parts will work?

[68krazy]

Re: Need help identifying old capacitors

Just wanted to update:

I ordered all of those parts and they came in yesterday. I installed them and everything is working great! Thank you Mr. Budm

[budm]

Re: Need help identifying old capacitors

Thanks for the follow-up.