Philips Medio 50 kW CP-H X-ray Control Desk Teardown

[Mads Barnkob]

I found a complete Philips Medio 50 CP-H system consisting of 2 meter tall 19″ rack with computer, driver, inverter and high voltage tank. Dual X-ray tube head rated for 150 kV and a control desk. It was only possibly for me to take the control desk with me. No effort was done for the driver, inverter and high voltage tank, as it was from the 1990’s and SCR based inverter design.

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System origin date is 27th June 1992. The X-ray tube seems to be a separate delivery as its not mentioned in the shipping list of the system. The Tube housing assembly with 2 X-ray tubes is marked 150 kV.



The CPU of the Philips Medio 50 CP-H control desk is a Siemens SAB8085A, 8-bit microprocessor, running at 5 MHz, with serial in/out port and up to 64K RAM. All inputs and outputs are handled by three Calmos CA82C55A programmable peripheral interfaces. Communication between CPU and PPI is handled by a Philips SCN2651. It is a Programmable Communications Interface, running a internal serial bus at 19200 baud rate.