>
>> Someone is certainly confused here. The HF RF bypass cap will
>> reduce 1.8 MHz ripple on the electrolytics. The problem with
>> ripple currents in the electrolytics has to due with resistive heating,
>> The designer usually sizes the caps to meet a ripple current heating
>> specification and if that ripple increases due to plate voltage swing
>> leaking back through the plate choke, the PS filter caps will operate at
>> increased temperature and somewhat reduced life.
>
>I must not follow what Rich has running through his mind on this
>one.
>
>I can't imagine a capacitor being banged every half-cycle by
>thousands of volts of rectified AC suddenly having a problem with
>an additional dozen volts!
>
Tom -- Can you imagine that 120Hz is different than 1,800,000Hz? Average
electrolytics are designed to work at frequencies in the audio range.
Some electrolytic manufacturers (Sprague) caution against exposure to RF.
end
- Rich..., 805.386.3734, www.vcnet.com/measures.
end
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