[Icom] IC-706 R511 What is it?

[Lefczik, Larry D]

I went to mods.dk and found the latest mod for the 706 (orig) was to
increase SSB power by adjusting R511.  Well, as we know, SSB audio has been
a problem with the 706 since it hit the market, so I had to try it.  I
applied a signal to the mic input with the compressor OFF and watched a Watt
meter as I adjusted the trimmer.  At full rotation, the meter moved from
about 40 Watts to 80 Watts, matching that of the maximum CW signal I could
achieve from this radio.  On the air reports indicate a clean signal, no
overdriving the audio.  

When I see an adjustment like this I wonder, why is it not adjusted to this
point at the factory?  Does anyone know what R511 does?

NJ2L