An early 6 KW HF Linear Amplifier with 4CX3000

Cover removed

 Bottom view

 Tube base, RF input network

and cooling air pressure failure switch

 Microcontroller's PCB

 Motor control PCB

The remote unit is reading frequency data from YAESU FT-847 CAT port

Menu function. Altering settings for software based protection

4x3-500Z HF Linear Amplifier

3 KW key down, 4,5 KW PEP 

2x833C 2.5 KW High Power Audio Amplifier - AM Modulator

The Amplifier's front

The Audio Output Transformer - Modulator and oil filled capacitors 

The HV PSU Transformer & Filter

300 DIN Audio Modulator & Choke