Preliminary experiment with 2010 SSB suggests the following combos to replace VT1 to allow a RIT control on SSB.
pot fixed R --- ------- 5k 12k wider adjustment range 2k 13.2k less adjustment range
These are based on SSB reference of 1.8 volts. You will have to vary the fixed R if your SSB voltage is different.
More later when I get parts. VT1 is on an umbilical cable waiting.
Larry Russell .... in Flushing, Michigan
Thanks to Ken Zichi, who several years ago passed along the general idea that a RIT mod was possible.