[QuadList] The Capacitor Chronicles

[C. Park Seward]

Just like Don said.  Also, not all the fans were working.

Another point is the extra 12v supply takes some of the load off the  
primary and it runs cooler.

I did have to change a few but not more than three.

Best,
Park

C. Park Seward
818-535-2747 cell
949-679-1870 hm
Visit us at: www.videopark.com
Sent from my iPhone

On Nov 27, 2009, at 12:54 PM, "Don Norwood" <dwnorwood at embarqmail.com>  
wrote:

> Like Guy, I rarely have found the large computer grade electrolytics  
> in the power supplies to be bad.  One large caveat however, if the  
> machine has been operated without proper cooling, all bets are off.   
> Park experienced numerous power supply problems, but we know that  
> the air filters in his machine were completely clogged when he got  
> it.  I suspect that contributed to his problems.
>
> As Park mentioned, Ampex used high quality caps in the circuitry of  
> the 2000 and 1200.  In general, I don't endorse changing them unless  
> there is a problem.  There are a number of hermetically sealed, mil- 
> spec tantalums that seem to last forever.  If you replace them with  
> the equivalent parts today, you'll be amazed at how expensive they  
> are!  I realize that the situation in the AVR-2 is different, but  
> the 1200/2000 machines do not seem to have many problems with caps.
>
> Don
>
>
>
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