[AMPS] Chokes and Dipping chokes?

[Jon Ogden]

>>Ä  Can you explain why the no-strap method would miss a potentially 
>>problematic resonance?
>
>Yes I can.
>
>Will you explain how an unshorted choke will show series resonances?

In the tank circuit, the choke IS shorted in terms of RF.  Rich is correct.

At one end of the choke, you have the HV bypass caps.  At the other end, you go thru your DC blocking cap and the Tune C.  Tune C is connected to ground.  

SO, it IS a short circuit meaning that both sides of the choke have a path to ground.

I did an experiment the other night measuring the dip of a choke in circuit while doing it Rich's way AND also shorting the choke directly.  Very little difference in the series resonance of the choke.  Both methods provided a dip w/in a few 100 KHz of each other.

73,

Jon
KE9NA



--------------------------------------------------------------------------
Jon Ogden

jono@enteract.com
www.qsl.net/ke9na

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


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