Amps like that have been common for Swiss (Zellweger) and DDR (RFT)
military.
73
Peter, DJ7WW
-----Original Message-----
From: amps-bounces@contesting.com [mailto:amps-bounces@contesting.com] On
Behalf Of Bill Fuqua
Sent: Donnerstag, 16. August 2012 02:23
To: g8on@fsmail.net; JeanPierre.Behiels@electrabel.com; amps@contesting.com
Subject: Re: [Amps] Schematics  for 4CX250B GG HF amplifier
Every once in a while we revisit this topic.
I will just cut and paste the following from some time ago.
Bill Orr's article about super cathode driven tube amps in the July 67 QST.
He has a example of a 4CX300A (control grid connected to cathode) cathode
driven amplifier.
It only has a power gain of 5. 375 watts out with 75 watts input. But
the
nice thing is that the 3rd order products were 46db down and 5th were -49.
This is quite an improvement over most amplifiers.
I have always wanted to do this using two stages one produce around
300watts output and the second 1500 watts.
A 4CX250b driving 4 parallel 4CX250B tubes. Should get similar results.
This naturally would require 50 to 70 watts drive.
73
Bill wa4lav
At 06:31 PM 8/15/2012 +0200, peter chadwick wrote:
>The 4CX250B is not suitable for use in the classic GG arrangement. Go
>to http://ahars.com.au/documents/eimac01.pdf for an explanation.
>73
>Peter G3RZP
>
_______________________________________________
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
|