Hard to imagine it takes an 807 just to drive a 4-65 pentode...unless that's an audio tube to modulate the screen grid?
Henry Radio built a ISM TX that had a 6AG7 crystal oscillator driving a 2E26 driving a 4-65A in the 13.560 MHz region. That was one assembly. The 3CX3000A7 was another and the PS another.
I had just the driver and built a PS and modulator for 20-10 AM; the final came with a small Johnson roller inductor. PP 809's provided the audio.
AFIK it is still OTA using a Johnson 122 VFO.
Carl