This is waht I have, hope it helps:
Characteristics
Plate Dissipation (Max.) 4,000 Watts
Screen Dissipation (Max.) --- Watts
Grid Dissipation (Max.) 225 Watts
Frequency for Max. rating (CW) 110 MHz
Amplification Factor 160
Filament/Cathode Thoriated Tungsten
Voltage7 .5 Volts
Current 51.5 Amps
Capacitance Grounded Cathode:
Input 38.0 pf
Output 0.6 pf
Feedthrough 24 pf
Capacitance Grounded Grid:
Input 38.0 pf
Output 24.0 pf
Feedthrough 0.6 pf
Cooling: Forced Air
Base: Special, coaxial
Air Socket ---
Air Chimney ---
Boiler ---
Length 9.00 in; 228.60 mm
Diameter 4.15 in; 105.50 mm
Weight 6.2 lb; 2.8 kg
----- Original Message Follows -----
From: Steve Thompson <g8gsq@ic24.net>
To: "john devoldere, ON4UN" <john.devoldere@telenet.be>
Cc: amps@contesting.com
Subject: Re: [Amps] 3cx300a7 input impedance
Date: Tue, 09 Aug 2005 14:10:24 +0100
>
>
>
> john devoldere, ON4UN wrote:
> > Can anyone help me with the input impedance of the
> > 3cx3000a7 tube (used on HF). I require this value to
> build a proper Pi- filter input circuit. The datasheet I
> have gives values between 46 and 50 ohms for different
> conditions from 4 to 4.8kV, 300-400W drive and 6-7 kW out.
>
> Steve
> _______________________________________________
> Amps mailing list
> Amps@contesting.com
> http://lists.contesting.com/mailman/listinfo/amps
>
_______________________________________________
Amps mailing list
Amps@contesting.com
http://lists.contesting.com/mailman/listinfo/amps
|