[Heathkit] Marauder - technical question

[Paul Baldock]

I'm in the process of bring a Marauder back to life.

I have a question:

When in SSB PTT/VOX, but not transmitting, the PA is biased to draw 
50mA. Why is it not biased off, and then to 50mA when in transmit? 
This how it works in CW and would be a simple mod to make it do it 
this way in SSB. It seems the designer must have had reason.

Any ideas?

- Paul  KW7Y