Well, I hope since you asked this, it will bring on one of the "guru's" that
will explain ripple current. I have been seeing that lately, and this old
guy will admit to not knowing what the heck it is!!!! I wouldn't think you
would need the same rating as the power supply current though!!!! What say
experts??? I'm wanting to change out my PS7 caps too.
73,
Don, WB5HAK
----- Original Message -----
From: "Ron" <wd8...@yahoo.com>
To: <drakelist@zerobeat.net>
Sent: Wednesday, October 28, 2009 8:34 PM
Subject: [Drakelist] Replacement caps for the PS7
Okay before everyone says Heathkit shop like they did last time, note that
the PS7 is the 13.8 volt power supply for the TR7 not the L7 power supply.
I need new filter caps, any thoughts on where and which ones?
I spotted some on mouser, but I can not find their ripple current ratings.
Apparently Mallory has changed numbers slightly and all I can do is guess
given the size above and below that they are about the correct current
rating. On that subject, I presume the ones in the supply are at least 12
amps each. That would get them close for the 25 Amp constant current that
the supply is suppose to be able to run. With the fan cooling them, I
would think 12 amp caps would be about right.
TNX es 73,
Ron WD8SBB
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