The thing that concerns me isn't the physical dimension or dual anode, but that the max rating specs are different in a couple places, like G2 600v to the FB/FJ's 1000v. The CTC16 would subject those G2s to 2-300v over max rating, right?
Also, heater current rating on the CY is 1.6A vs 1.8 on the FJ/FB.
https://frank.pocnet.net/sheets/168/2/21CYP22.pdf
CTC10
CTC16x
