BG7MEB You don't necessarily need to use any "high-speed logic devices."
The Si5351 or MS5351 clock generator is a good option. Alternatively, you can use a source crystal with the appropriate frequency and mix it to create a 10.7 MHz intermediate frequency, which can then be connected to the Tayloe Detector.
When the Si5351/MS5351 outputs, the maximum clock frequency is 200 MHz. The transmitting part may be directly referenced from uSDX. However, it is said that when the transmit power remains constant, a higher frequency requires a higher pressure rating for the tube.