But you really should think thru what would be a good BIAS drive level for the MAJORITY of the MODE(s) you use...
Use AM, keep the mA kind of low, below 50mA for both - so the Envelope can SWING too...
Yes, Swing...
The Zener's, if used, at 50 mA and above - are only leaving a small window - which limits the RF pushing the Gate conduction upwards - like what others do with Volting - Gates can exhibit the same thing. They just need a presence so if you're an AM'er and don't really care for SSB - then LOWER the Gate mA drive - let the RF push it and switch them on in their linear region.
If you don't understand any of this - then use the "Good Book" you've got and run that with those values, you posted above and gripe later...
Why do I say what I do above?
Well, Connex showed you on a regular Galaxy EPT3600 board running a 300W on-board amp - what they did to the Driver. They used 82K for R219...
Why?
Because of the reason why the thread blew up - Connex doesn't go with SSB all the time, so they don't need to use the "standard" default values and settings any Galaxy (or similar SEE:RCI) wired and sold with SSB. At least on Radios that are not set up for REQUIRING such a high drive level since they don't use the MODE for it.
AM you have the carrier - on SSB you have to talk or send some kind of audio signal talk, it becomes the carrier (or signal in the RF realm) as the Power envelope just "dies" when you DO NOT send any audio.
So, look above, the Driver? You'd be lucky to get 35mA MAX drive from that R219 value - so it tells you by reviewing the different resistor Bias values like R219 is, informs you of the TYPE of bias drive you'll need to think about resetting the new Driver and Final for later.
By why lower on the Driver? Well, it's [pretty] simple - you need envelope POWER (your PEP) to handle the audio information - so the Finals will take on most of that chore - the Driver will - by bias - send enough RF to offset that Audio drive present for the Drain to Source (Collector to Emitter) So again, like a Bipolar of old, The Base needs to have enough DRIVE present to handle the Collector to Emitter swing.
The Driver will easily form up to 5 watts of RF power at 35mA - above that you risk blowing up GATE's of the FINALS from the DRIVERS Own output to the Finals' INPUT DRIVE LEVEL being too high and exceeding 20V P-2-P