>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.
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