I have a unit in which the stock coupling caps have been replaced. The only markings on the caps is:

.22 k
400V ECI

They are pale yellow axial types

Can someone please tell me who made this cap? And am I correct in assuming it is .22 uf? Why aren't they marked in the traditional manner?
Thanks, Vince

Based on your description (the way the print is laid out on the cap), educated speculation tells me it could be an Illinois Capacitor .22µF-400V WMR Series Metalized Polyester tubular film cap.

IC caps are pale-yellow/yellow and have this numbering scheme. They are generally very inexpensive, and recommended by some tube amp rebuilders. They're widely used by d-i-y 'ers in tube amps as coupling cap replacements.

The 'K' simply means that it has a 10% tolerance.

. . Falcon

Hi FalconEddy
Thanks for your reply.
I just recieved some Ill caps- WMR series and I compared them
side by side. The unknown cap is slightly paler in color. It is 400V and larger in diameter than the Ill cap which is 630V. The lead wire of the unknown cap is about twice the diameter of the Ill cap.
The end fill material in the unknown one is much paler than the
body color whereas the Ill cap is much yellower than the body.
And no logo on the unknown cap.
So I don't think they are Ill caps *unless* they are older prodution ones.
I have another problem with these caps and I am going to post it in the Sansui section.
Thanks, Vince

Vince,

Here's a photo of an older series Illinois Capacitor I was talking about.

Does it look like this?: (except .22 instead of .68)

http://www.FalconEddyStudios.com/images/IC-YellowCap-68.jpg

. . Falcon

Thank you!!! Now, because you are obviously knowledgeable about caps, here is the other problem I posted on the Sansui section:

I recently acquired a Sansui 1000A which has had the coupling caps replaced.
The original factory value for them is .3 uf @ 250V. They were replaced with .22 uf @ 400V. That is well outside the usual +/- 10%. I don't think the voltage is a problem but the big change in capacitance worries me.
What should I do about this? Apparently .3 uf @ 250V caps are not easy to come by.

Thanks, Vince