For sure... but I used all the 365pf tuning caps that I had when I built a number of tuned loop antennas for myself and several friends... still digging in "junk boxes", might find something suitable.
"Fixed tuned" worked well enough for my purpose of testing the operation of the circuit.
jr
Update: I "biased up" the G2 somewhat by connecting it through a 470k resistor to the B+ supply. G2 now sets at about + 25 volts. The modulated output is no longer missing the negative information from the modulating signal and the transmitter continues to oscillate when the modulating signal is removed, but it is not very symmetrical (sorry 'bout the fuzzy handheld pix). The tube is now drawing more current and the B+ supply has dropped to about 110 VDC. Obviously, the 10k resistor in the power supply will have to be reduced, and likely more filtering will be needed to handle the increased current load. More work is needed, but out of time for today.