After 10 years I put my hands on this beast: it was the first color TV sold in Europe in 1966-67. It's a full tube set and today is extremely rare, especially in full working conditions.
The first Philips colour TVs from a 1967 leaflet: rear left the 21KX100A used for the experimental NTSC and PAL transmissions, rear right the model with the K5 chassis with an improved electronic design and the X25K121, the first commercial set.
https://i.imgur.com/7ikVE6Q.jpg
This is a Philips X25K121, the first commercial color TV sold by Philips in 1966-67 and overall the first TVC model sold in EU. From the top the commands are for:
- Volume
- Brightness
- 6 preselected channels
- Color on/off switch
- Power switch
- Contrast
- Color saturation
https://i.imgur.com/VQgq1xb.jpg
The Philips K6 full tube chassis
https://i.imgur.com/afVxZ9C.jpg
Audio and color processing circuits. The data on the PAL delay line says that this set was built in 1968
https://i.imgur.com/599dvfH.jpg
Vertical and line oscillators + vertical output circuits
https://i.imgur.com/ic4pSTp.jpg
High voltage cage with the line output transformer. Tubes: GY501 high voltage rectifier, PD500 high voltage stabilizer
https://i.imgur.com/yEp5Ct4.jpg
Tubes and transistors layout
https://i.imgur.com/ZLHGxKw.jpg
The line output/high voltage section
PL505 main line output
PL500 auxiliary line output
PY500 damper
DY51 focus rectifier
Video of the TV
https://www.youtube.com/watch?v=wd5kTJftuSE