I do not understand you. I thought multilayer chip condensers are just like
a sandwich and every other piece of bread is connected with each other? de
Hans
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>Fr?n: Ian Roberts <itr@nanoteq.co.za>
>Kopia: amps@contesting.com
>?mne: Re: SV: [AMPS] Capacitor series resonance
>Datum: tor 4 nov 1999 10.09
>
>
>The best capacitors for RF decoupling are monolithic chip caps. They
>have a slab of solid material such as tantalum nitrile to separate the
>two poles of the cap, which are typically splattered-on leadless plates.
>These are normally used in parallel or series with the signal path in
>low-loss devices such as preamps, for high power use they are also
>suitable, but examine their RF power handling (current and voltage)
>characteristics carefully.
>
>Proper RF decoupling is never associated with a single cap, that's why a
>row of caps such as 4.7p, 47p, 470p, 4700p, 47000p, etc, are often used.
>Each cap "bypasses" the particular freq of interest, all the more
>important in a device such as a wideband amp where there could be a 17:1
>(30 MHz/1.8 Mhz) frequency range.
>
>For example, much has been said on this page regarding input and anode
>tuning components and their values, but little on low impedance RF
>bypassing of the intermediate stages, crucial on high frequency devices
>such as the 4CX250 and 2C39. Maybe even on the 3-500, some tailored
>bypassing may leak off the "big bang" before it becomes destructive...
>
>Ian ZS6BTE
>
>Hans Goldschmidt wrote:
>>
>> Very interesting. What capacitor would be the best then? Hej daa de Hans
>> SM5KI
>> ----------
>> >
>> >
>> >Hans Goldschmidt wrote:
>> >> ----------
>> > The best broadband
>> >> condenser should be a multilayer chip condenser that has no leads at all.
>> >
>> >This is not correct.
>> >If the layers were "unrolled", the overall length could exceed that of a
>> >ceramic disc or mica cap with leads clipped short, producing inductance.
>> >Ian, ZS6BTE
>
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>
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