At 08:28 PM 7/22/04 -0400, SuperDave wrote: Wonderfull! :-( Do you know if B&H built professional grade test equipment? This looks far too complex inside to be for a hobbiest. BTW these don't seem to be too rare. I searched the net and found several for sale but no one has any info on them. BTW II. This came from Lockheed Space Operations at Kennedy Space Center so they must have thought it was pretty good quality. I checked the timing of the square and sine wave generators in it against a HP counter that also came from KSC and was recently calibrated and they agree exactly. The HP counter is a HP model 5245 with Nixie tubes. The date code on it says that it was built in the 44th week of 1969. It was still being used at KSC till April 2003 when one Nixie tube died and the retired it. Hard to believe that it's over 33 years old! Joe