TVs with delta-gun tubes and random access digital tuning

[kf4rca]

Although not a mainstream manufacturer Heathkit also had delta gun sets with digital tuning.
The GR2000 had just up and down buttons for channel selection. The GR2001 had keypad entry. Both used the 25VCZP22 tube and had on screen channel (and time) display. Incidentally, they both convert over to video monitors very easily.