And BTW: these are also known as #327 bulb (327 or 387). And they may be prefixed with CM or LHT -----Original Message----- Hello all, I found a cheap source of the lamps for the R-1051 and many other radios. I had need of them for a T-827D exciter as well as several Harris units (RF-110A, RF-601A control unit), RF-127-02 coupler etc.