[ARC5] BC-348-Q Capacitor Testing

[Sudipta Ghose]

This mail is very helpful to me. I have only an oil-filled capacitor
that I have not replaced in my BC348N.
Now armed with the data about the input current requirement it will be
a smooth affair.
Regards,
Sudipta Ghose VU2UT

On Sat, Jan 30, 2016 at 5:56 AM, Robert  Eleazer <releazer at earthlink.net> wrote:
> First thing to do is to check the current drain with the receiver powered
> up.  I have a BC-348N that had a AC power supply installed exactly per the
> Surplus Conversion handbook.  Fortunately, the owner did no more than that,
> even using the ON-Off-MVC- AVC switch as the AC power switch and even
> leaving the dial light dimming control intact although disconnected.
>
> After confirming that the receiver worked I rebuilt the power supply,
> removing the dynamotor plate it was using and replacing it with a 1/8 in
> thick piece of AL.  I added some resistors to the AC line and B+ line to get
> the B+ down to 200VDC (the Surplus Conversion Handbook has you use a 300V
> transformer) and added an in-line AC switch to keep from having to use the
> MVC-AVC switch.  Current drain is about 60 ma and I have left all the caps
> untouched except for the ones in the power supply.  If your B+ current drain
> either on an AC supply or the dynamotor is more than 60ma you should look
> for possible cap leakage.
>
> Wayne
> WB5WSV
>
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