If you take the grids to ground by a low ohmic resistor as a fuse with some
high value cap in paralell, would that not add to parasite suppression? At
the parasite frequency the cap, due to its inherent inductance, is no longer
a cap and the grid sees only a resistor to ground?
In the Henry 2K3 they measured the voltage drop across the resistor for grid
current measurments as well.
??? de Hans
>Från: "Tom Rauch" <w8ji@contesting.com>
>Till: <amps@contesting.com>, "Richard" <guyr@n-link.com>
>Ämne: Re: [AMPS] RF Choke
>Datum: tor 2 nov 2000 17.33
>
>
>> Would someone be kind enough provide me with a source for a replacment 1mh
>> RF choke for the grid of a SB-220. The only values I am able to locate
>> are Millen 200 and 300 ma 1mh chokes. What value should I look for as a
>> replacement?
>
>Richard,
>
>Ground the grids at each grid pin directly to the chassis with a lug
>at each grid pin.
>
>Be sure to remove the tubes before drilling any holes.
>
>The amp will work better and be more stable with the grids directly
>grounded.
>73, Tom W8JI
>w8ji@contesting.com
>
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