Thorn 9000 Chassis
Model: Multibroadcast 7773
Integrated Circuits: Yes
In 1975 Thorn once again startled the TV industry with the introduction of the 9000 series chassis with its Syclops combined chopper regulator/line output stage.
The 9000 used a parallel switched-mode power supply running synchronously with line. A conventional transistor line output stage except that it uses the power supply switching transistor to conduct the latter portion of scan with an efficiency diode conducting the first part. This was known as SYCLOPS (SYnchronous Converter and Line OutPut Stage)
Here we have a 20″ Thorn Television Rentals Model 773 badged for the Multi-broadcast chain. Ultrasonic remote control (sequential channel change & sound mute only)Nice touch is the nixie tube channel indication.
This one came from the same storage source as the Ferguson 3713 and therefore the electronics have suffered with the same humidity/rust issues.