Hi Firson:
What is the plate voltage?
You will find that the 4-400 tubes require more plate voltage than the 3-500
or 3-400 for the same gain.
Marty
----- Original Message -----
From: Firson Maryutenli <firson@hotmail.com>
To: <amps@contesting.com>
Sent: Thursday, November 16, 2000 5:55 AM
Subject: [AMPS] Drive for 2x4-400A GG
>
> Hi All,
> Now I currently building Amplifier for SSB 80 meter band using two Eimac
> 4-400A tube in Grounded Grid Mode. I got problem from my tranceiver that
is
> not enough power for driving this amplifier until full output. With 100
watt
> drive only produce 600 watt output and plate current are quiet low only
> indicating betwen 300 to 400 ma. I have no maching input (tune input) and
> tranceiver output directly connected to filamen. How to design maching
input
> for this tube ? so I can drive this amplifier until full output for only
100
> watt drive.
>
> Thanks in advance
> Firson - YD1BIH
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