Schematic I have is for 1084.9800.01S. V102 is in there as SHF-88. Parts list for 1084.9800.01SA shows it as SHF-O186K4230TR made by Stanford
Mine failed after sending it out to calibration. Soldering in another switch didn't resurrect it so bought another modulator and calibrated it myself. Worked reasonably well, +.5dBm off over the whole amplitude and frequency range. Can live with that.