[R-390] Solid State Voltage Regulator

[Barry]

I'm considering building Dr. Jerry's design for the solid-state regulator as outlined here:

https://www.navy-radio.com/manuals/hsn/hsn-issue%2052.pdf

Rather than having to connect the output to the 180V test jack, I'd prefer to make it completely plug-in compatible with the tubes.  This means the output will go though the 47-ohm cathode resistors which provide a small voltage drop.  Would it be possible to simply add a regular diode(s) in series with the 180V zener diode (D1 and D2 for the initial schematic or just D4 for the alternate schematic) to increase the output voltage by a diode drop or two to do that?

Thanks,
Barry - N4BUQ