This was not originally *my* question, I just felt that Rich did not
accurately address it in his first reply, and I didn't want to miss the
wisdom that might come forth should he reevaluate the question.
Jeff
----- Original Message -----
From: "Richard" <2@mail.vcnet.com>
To: "Jeffrey Madore" <K1LE@ARRL.NET>; "AMPS" <amps@contesting.com>
Sent: Monday, July 01, 2002 10:25 PM
Subject: Re: [Amps] Drake L7 PS questions update
>
>
> >Rich,
> >
> >Read the question again, carefully, and try again!
> >
> I read it again, Jeff. Which capacitors are you talking about at
> "adding capacitance gives me some extra filtering cushion"?
>
>
> >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
> >>
> >> _______________________________________________
> >> Amps mailing list
> >> Amps@contesting.com
> >> http://lists.contesting.com/mailman/listinfo/amps
> >>
> >
> >_______________________________________________
> >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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