AM CQUAM TRANSMITTER
ASM - 400 C-QUAM AM STEREO SYNTHESIZER
AM STEREO Transmitter
8 - 400W PEP max RF Out (2 - 100W Carrier)
50 Ohm RF output
1KHz Step - DDS Frequency synthesizer stability 0.5Hz
L & R inputs at 0dbU for +125% / -99% modulation
CQUAM stereo system
4X20 LCD Backlited Blue Screen
RF FWD & REFL Power metering
VSWR Protection
Transmitter Timer ON/OFF thru menu
Stereo/Mono menu selection
230 or 115 VAC operation
AM Stereo Separation >35db
2U 19" Rack mount unit
More info for the above  AM CQUAM stereo transmitter can be found at asmax-1
Get back ?
And if you want to convert a monophonic AM radio to a STEREO AM receiver for CQUAM system, here we have a C-QUAM DECODER  ADD-ON BOARD that takes the IF 450KHz or 455KHz signal and DECODES AM STEREO BROADCASTS!
For more info take a look at the link:
D-QUAM
And some LINEAR AM AMPLIFIERS  one with an output of >60W PEP @ 28VDC and another with >40W PEP
and a 600W complete AM CQUAM Transmitter!