[Amps] strange inquiry for 4CX15,000A use

[John T. M. Lyles]

That question is like asking which refrigerators use brand X 
compressor, or which trucks use a Cummins (or Fiat) engines. The 
4CX15,000A is used (and has been used for many years) in all sorts of 
transmitters, from broadcast FM rigs in the 20 kW output range (class 
C) to drivers for particle accelerators, to linear amplifiers (class 
AB1 or 2) and so on. If you wish to just purchase a transmitter using 
this tube, and don't care about the frequency, mode of operation, 
suggest you contact CPI/Eimac, the original designer of that tube and 
a current manufacturer, for a list of who uses it today. You might 
not get that info, but you can probably get market segment data at 
least. Then you should search for companies and call or check the web 
to see. Not as many companies are using it in new products now, as 
solid state is slowing overcoming a lot of the <20 kW power range for 
<150 MHz frequencies.

K5PRO

>
>Date: Wed, 26 May 2004 15:59:58 -0600
>From: Horne David H Civ OO-ALC/YPVS <David.Horne at HILL.af.mil>
>Subject: [Amps] What Transmitters use the 4CX15000?
>To: "'amps at contesting.com'" <amps at contesting.com>
>Message-ID: <200405262201.i4QM16K0019870 at ofgate.hill.af.mil>
>Content-Type: text/plain; charset="us-ascii"
>
>I am interested in identifying and possibly obtaining a transmitter that
>uses the 4CX-15000 (I think it has an A on the Part Number).  It's a large
>tube.  I have heard that it is used for FM, SSB, and RTTY service.  The gain
>may need control.