CDM Capacitor

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sallen
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CDM Capacitor

Post by sallen » Sun Aug 02, 2015 6:08 pm

I need a CDM Type 293 cap for the output filter on a Nautel ND50. Yes I'm in contact with Nautel and they say they have none in stock.

The cap is CDM Type 293
.0016mfd, 15000 pwv, 18 amps rms at 1000KC

Any one know where I can get one now and shipped second day. Who makes it. I'm busy cleaning up a little mess and have not had a lot of time to look on line yet. Thought I would ask here to see if there were any leads on one or more. One would get it back in working order but two other caps next to it got some heat damage so I will eventually need three more.

Nautel said they were just one leg in cost but I need four so it makes up almost whole body, two arms and legs worth in cost.

grich
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Re: CDM Capacitor

Post by grich » Sun Aug 02, 2015 6:50 pm

Check Commercial Radio in Cavendish Vermont.

http://www.commercialradiocompany.com/

sallen
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Re: CDM Capacitor

Post by sallen » Sun Aug 02, 2015 8:46 pm

That worked! by chance I called their number and by luck Dan Churchill answered the phone (on a Sunday) and we had a great conversation, they have the cap in stock and all looks good for the ND50 output filter. Cost was a lot better. Might be able to keep a hand and a leg now!

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Dale H. Cook
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Re: CDM Capacitor

Post by Dale H. Cook » Mon Aug 03, 2015 9:10 am

sallen wrote:... by luck Dan Churchill answered the phone (on a Sunday) ...
Likely Dan still lives in the old Duttonville school house that houses his business. He was living there when I was an occasional visitor to Cavendish in the 1980s.
Dale H. Cook, Contract Engineer, Roanoke/Lynchburg, VA
http://plymouthcolony.net/starcityeng/index.html

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Deep Thought
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Re: CDM Capacitor

Post by Deep Thought » Mon Aug 03, 2015 9:35 am

FYI...the newer mica capacitors are just a tad shorter than the older ones, just enough to cause a less-than-optimal connection to the "paralleling plate" when mounted near the old ones. I would recommend that you carefully check the height against the others prior to installation or you'll lose the newer one due to excessive heating. You may need to install a thin shim on one end.
Mark Mueller • Mueller Broadcast Design • La Grange, IL • http://www.muellerbroadcastdesign.com

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Dale H. Cook
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Re: CDM Capacitor

Post by Dale H. Cook » Mon Aug 03, 2015 11:08 am

Deep Thought wrote:... the newer mica capacitors are just a tad shorter than the older ones ...
Thanks for the heads up. So far I've only had to replace mica caps in the ND-1 so I haven't had to replace any that are paralleled. I always have a variety of brass washers with me, but if those are too thick I will grab a piece of scrap copper strap and my Roper Whitney No. 5 Jr. hand punch from the "fire box" (orange in color, and so-called because it holds torches, small strap and scraps, braid, and a variety of stuff needed for work with strap and plumbing). A bit of strap with a neatly punched hole should work well for shimming.
Dale H. Cook, Contract Engineer, Roanoke/Lynchburg, VA
http://plymouthcolony.net/starcityeng/index.html

sallen
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Re: CDM Capacitor

Post by sallen » Tue Aug 04, 2015 8:15 pm

Got the caps today from CA Service and supply. Nautel is very happy and it got a nice air bath and hot towel rub down while it was waiting for parts.

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kkiddkkidd
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Re: CDM Capacitor

Post by kkiddkkidd » Wed Aug 05, 2015 7:38 am

sallen wrote:Got the caps today from CA Service and supply. Nautel is very happy and it got a nice air bath and hot towel rub down while it was waiting for parts.
Well that sure sounds like a happy ending on this one...
--
Kevin C. Kidd CSRE/AMD
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