[AMPS] Re: Parasitics

Jon Ogden jono@webspun.com
Thu, 14 May 98 17:07:53 -0500

>A 100-ohm resistor can LOOK like 1K to the tube, because of the
>impedance-transforming properties of the inductances in the circuit.

I well, so you say....

Transmission lines, etc can act as impedance transformers.  This is the 
whole idea behind phasing harnesses on antennas, 1/4 wave transformers, 

However, a supressor is typically not any appreciable wavelength from the 
anode.  So how can you say that it's impedance is transformed.  Even if 
you do get say, 1 KOhm of impedance from all the inductances, that's NOT 
a REAL resistance.  That is a reactance.  Reactances do not dissipate 
power (at least not much); they store it.  So how does 50 to 100 Ohms of 
REAL resistance get transformed to 1 KOhm.  I fail to see how that can 
possibly happen.  IMHO, you would need a REAL resistance to absorb power.

Please enlighten me.



Jon Ogden


"A life lived in fear is a life half lived."

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