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[Amps] Which Vg2 for 4CX1500B SSB ?

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Subject: [Amps] Which Vg2 for 4CX1500B SSB ?
From: "Peter van Daalen" <>
Date: Sat, 24 Jul 2004 23:42:42 +0200
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Hi all, I am new to this list and need some help.

In various ( linear SSB ) 4CX 1500B PA designs I have seen various Vg2
voltages from + 225 V until +300V.

As far as I could recall, the lower the Vg2 the lower the IM3.

What could be the reason for designing a ( SSB linear ) 4CX1500B circuit
with  Vg2 at 300 V ?
End of all, one of the reasons to choose for a 4CX1500B is the relative low
What are pro's and con's of such high Vg2 ?

EIMAC's " Care and feeding.. " does not resolve this question for me .
Who could ?

Peter, PE1ECM

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