[jhalphen]

Hi to All,

to Scott_Estonia:

In the family of RCA color viewfinders using the Hitachi H6289 Beam-Index tube, the CKC-021 is the most rent. It has only 2x Printed Circuits Boards (PCBs) stacked one upon the other.

The older CC-030 uses 3x PCBs

CT-101 CRT: reference is Matsushita A04-JGM09X, 3 guns inline shadow-mask technology. See closeup photos.

Converting the VF to direct PAL/625 operation vs using a PAL to NTSC transcoder. I don't think it will work because the stripe pitch multiplied by scanning speed is optimized for NTSC.

From memory, in the theory of operation it says that 3.58 MHz color subcarrier info is heterodyned down to 2.667 MHz dot pitch frequency.

For PaL you would have to heterodyne 4.43 MHz to the same 2.667.
Hitachi built several complex analogue ICs to reduce component count/power consumption in the design. Duplicating this with transistors is going to involve a very complex board design job.

See the internal structure of the Hitachi HA-11759 Index Processor chip in page 6 of this thread.

Best Regards
jhalphen
Kyoto/Japan