[NJARC] RCA Victor C-2E

[Edward Otte]

Yes, I knew one could go a bit larger but I was wondering the upper limit. I
mean at some point it starts to hurt the rest of the circuitry. 60% was the
rule of thumb I was looking for. Thanks.

-----Original Message-----
From: njarc-bounces at mailman.qth.net [mailto:njarc-bounces at mailman.qth.net]
On Behalf Of Harry Klancer
Sent: Tuesday, May 15, 2007 9:37 PM
To: New Jersey Antique Radio Club
Subject: Re: [NJARC] RCA Victor C-2E

Visit our web site - See http://www.njarc.org
_______________________________________________
Edward,

Consider. Time constant of an RC is   T = RC   (dropoff is exponential).
(Remember, microfarads are 10 -6, kilohms are 10 +3)

A bigger C just means that the voltage from the peak doesn't drop off
as fast.. For 60 cycle half wave, there are 16 milliseconds between peaks.
Make yourself a little drawing, and you'll see what I mean.

As long as C is not so large that the RC never discharges, the dc 
voltage will
be OK, so you can use a larger C. 60 percent larger is not normally a 
problem.
As Marty says, 47/47 instead of 50/30 is fine. BTW, modern standard 
values are
22 and 33 and 47, etc.

                                                          Harry K

                                         



Edward Otte wrote:

> Visit our web site - See http://www.njarc.org
> _______________________________________________
> What is the rule of thumb here on going bigger?
>
> -----Original Message-----
> From: njarc-bounces at mailman.qth.net [mailto:njarc-bounces at mailman.qth.net]
> On Behalf Of Marty Friedman
> Sent: Tuesday, May 15, 2007 2:07 PM
> To: New Jersey Antique Radio Club
> Subject: Re: [NJARC] RCA Victor C-2E
>
> Visit our web site - See http://www.njarc.org
> _______________________________________________
> good work Aaron I missed it in the Sams index.. I found it in Beitmans.
The 
> C2 had 50/30 mfd, in the C3 they "improved" it to 50/50 mfd. so 2- 47s
will 
> be fine.
> Marty
>  
>
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