>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
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>
- R. L. Measures, a.k.a. Rich..., 805.386.3734,AG6K,
www.vcnet.com/measures.
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