[Amps] Are bifilar filament chokes frequency sensitive?

[R L Measures]

On May 28, 2006, at 10:18 AM, w2cqm at juno.com wrote:

> I'm retrofitting a filament  bifilar choke from a Henry 2K4 (pr of  
> 3-500's)  10-80m amplifier  to a hombrew  amplifier that includes  
> 160m operation. Are there any concerns about the suitability of  
> this component in the operation of an amp with the additional band   
> coverage? Any help would be appreciated.
> Ron W2CQM/3
>
Ron --- The SB-220's 9uH filament choke works well on 160m, however,  
the XL of the choke needs to be cancelled by XC, so 900pF needs to be  
added to the calculated output C of the 160m tuned input.
   What is the L of the Henry's filament choke?

cheers
>
>
>
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R L MEASURES, AG6K. 805-386-3734
r at somis.org