[sdiy] ARP Odyssey capacitors

[Bob Weigel]

I've not seen actual failure of an of the ceramic or silver mica caps.  
I mean...mica and other minerals obviously are pretty stable until it's 
punctured by HV.  The Orange drop caps are also pretty good long term in 
most cases being what polypropylene?  That I'm aware only the tantalums 
tend to fail at about this age and possibly the other electrolytics in 
the PS could use changing.

And also in many cases regular electrolytics are fine but some the lower 
esr is of advantage.  (In particular the classic ARP Omni deal where 
they used 22uF tantalums all the way across the release envelopes!  I 
mean...c'mon.  We're talking relatively slow response needs here as 
these caps charge and discharge to create the envelopes.  I don't 
believe anyone can tell a difference.    -Bob

Nicholas Gregorich wrote:

> Hello. I am recapping my ARP Odyssey. I have a couple questions.
>
> Should silver mica caps be replaced during a restoration? How about 
> film capacitors? For that matter should ceramic disc capacitors be 
> changed?
>
> I've read some advice to replace tantalum capacitors with electrolytic 
> when recapping. I don't think any have failed on the Odyssey but maybe 
> it would be better to get high voltage rated tantalums if available? 
> It doesn't seem like a great idea to replace a tantalum with an 
> electrolytic because of their higher ESR.
>
> Can anyone identify the orange capacitors in this photo:
>
> http://homepage.mac.com/nicksdsu/temp/board_b_caps.jpg
>
> Are they a type of film capacitor (n00b question I'm sure)? They 
> aren't listed on the ARP parts list (I found a few other errors on the 
> schematics/parts list). I just noticed these caps are on board C as well.
>
> Finally, is the best way to remove the filter module by desoldering 
> the filter pins from the main board or desoldering the filter PCB from 
> the filter pins?
>
> Thanks!
>
> Nick.
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