[R-390] Re: [R-390A] Electrolytic Can Filters C603 & C606

[Bob Camp]

Hi,

What is commonly available are plug in cans with octal bases on them. 
They don't look like the original capacitors but most of them fit just 
fine in the same location. Some of the cans are plastic and others are 
metal. I prefer the metal ones, but that's because I dig them out of 
the trash at work.

Since the cans are square rather than circular they have more volume to 
stuff things in to. That makes the recap job a little easier and may 
allow larger capacitors to be used.  Opinion is mixed on just how large 
a capacitor to use if you do go larger.  Bigger capacitors give less 
ripple, narrower current spikes and higher voltages. Less ripple is 
good there is some debate about the higher voltages. Narrow current 
spikes are not a good idea. The caps that are located after a choke 
don't have any problems but the input capacitors do.

If you decide you need to pick up some more plug in capacitors what you 
need to be pretty careful about is the can height. The parts in there 
are just about maximum height to clear the bottom cover. You don't have 
to worry much about value or voltage since what ever is inside is 
probably long dead anyway. A visit to the local ham fest is usually the 
best route. At one time Fair Radio would sell you an audio deck minus 
the connectors. I don't remember if they left the capacitors in place 
or not. Either way they are a likely source if you need to go mail 
order.

	Enjoy!

		Bob Camp
		KB8TQ



On Apr 25, 2004, at 12:11 AM, Lee Bahr wrote:

> I'm about ready to take my Dremmel Tool out and cut my C603 and C606 
> power
> supply filter caps open to RECAP them from my "cap kit".  If I screw 
> them up
> on my first go round, how hard is it to find replacement cores to try 
> it all
> over again if I fail the first time?  Are they available?  It would 
> make me
> feel a lot better knowing they are not impossible to locate or I had 
> spares
> if I did screw them up.  Anybody have any units bad or good available?
> (I've got many can electrolytics, but none that plug in.  In fact I 
> have
> never seen any like this before.  But then, I am new to R-390A 
> restoration).
> Lee, w0vt
> Houston.
>
>
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