[R-390] EAC R-390 factory modification that incorporates USB/CW/LSB

[TChirhart]

Does anyone know any anyR-390's that were modified under contract that
removed the BFO on/off switch and replaced the BFO pitch control with one
control?  I saw an R-390A, EAC contract that had this modification. A
vertical 1 inch by 3 inch matching grey panel plate was installed over the
two switches and only one control remained. It had a LSB CW USB position
where the BFO pitch control previously was located. The owner indicated that
this was a rare factory modification. Sorry no photos were taken. So was
there ever a modification of this nature that was not an aftermarket add on?

73

Tom K4NCG