[AMPS] Resonances

Steve Thompson amps@txrx.demon.co.uk
Thu, 21 May 1998 07:35:36 +0100


In message <B0000300035@emerald.axnet.com>, Jon Ogden <jono@webspun.com>
writes
>>>You really should measure impedances in actual system with the layout 
>>>and components used if you want to determine possible VHF voltages.
>>
>>I agree entirely - I just don't have an amp to do it on so I thought I'd
>>see what the individual component looked like. I'd be surprised if the
>>general effects I saw were to change massively when in situ
>
>It can definitely change.  Especially impedances at higher frequencies, 
>etc.  That's the tough part about RF.  I think you measured a capacitor.  
>These are less affected by nearness to other components, shields, etc. 
>than inductors, but I think you would see a modest change.  Massive?  
>Unlikely unless the circuit design is terrible.  Modest?  Quite possible.
>

For sure - 'general' and 'massively' were carefully chosen :-)

Steve

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