>
>Greetings:
>
>I am building a large amplifier and want to use swamped grid input to a
>pair of 4-1000's. Are there any issues to be watched for or worked around
>when using resistive grid loads of 400 to 1000 ohm banks of lower value
>resistors?
>
? Since it takes c, 140v-pk to drive the grid, 200?s of grid swamp is
about right for the 4-1000A/8166. The 50? input is matched to 200?s with
a Z=1 to 4 broadband transformer. The grid reactance can be neutralized
with a Bruene neutralization bridge. See Figure 5 on my Web site for
more info.
- Free, unsolicited advice: 7kV anode with 1kV screen is nice.
cheers, Larry
- R. L. Measures, a.k.a. Rich..., 805.386.3734,AG6K,
www.vcnet.com/measures.
end
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