Rich,
Read the question again, carefully, and try again!
Jeff - K1LE
----- Original Message -----
From: "Richard" <2@mail.vcnet.com>
To: <RMead100@aol.com>; " AMPS" <amps@contesting.com>
Sent: Monday, July 01, 2002 6:44 PM
Subject: Re: [Amps] Drake L7 PS questions update
>
>
> >Greeting to the list
> >
> >Having obtained the parts to rebuild the smoked PS from the L7, and
located
> >some printed circuit boards which will work with some slight
modifications,
> >I wonder if there is any logical reason to add a capacitor(with
equalizing
> >resistor) or diode in the each string of the voltage double circuit.
>
> Yes, if you like to repair amps. The PS chapter of the newer Handbooks
> explains why equalizer resistors unequalize the reverse currents in a
> string of diodes and increase the chance of diode failure.
>
> >The
> >stock circuit uses 7 diodes and 4 caps in each leg. The PC boards I
> >obtained
> >have some extra capacitor and diode space that I will otherwise jumper,
> >and I
> >have an extra capacitor for each leg of the doubler. I also have extra
> >diodes.
> >
> >Seems to me that if I add a diode, it increases the PIV factor of the
> >string,
> >and adding capacitance gives me some extra filtering cushion.
> >
> >Is there a good reason not to do this ??
> >
> >Randy K8BUX
> >_______________________________________________
> >Amps mailing list
> >Amps@contesting.com
> >http://lists.contesting.com/mailman/listinfo/amps
> >
>
>
> - R. L. Measures, a.k.a. Rich..., 805.386.3734,AG6K,
> www.vcnet.com/measures.
> end
>
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