Radio Society of Greater Bixby

Tom WA5MAZ (ex KJ5NMH) is making sure his old Motorolas are up to spec, and bot this Gertsch FM deviation meter in Muskogee for 75 bucks. It’s old, full of tubes, and needs to be at a particular temp to be in spec, so comes with A Mercury Thermometer that contains Hg. It’s a normal thermometer reading from minus 20 to 70 deg C. It goes in horizontally, the hole next to the phones jack to sense the temp of the crystal oven. Hey, trivia question: Is human body temperature really 98.6 deg F, and the answer is No, it was originally ‘around’ 37 deg C and the equiv F is 98.6 which implies an accuracy that is excessively precise. Back to radios: Tom has also installed one of the Mot mobiles in his white van with a brand new Mot 5/8 wave antenna on top. That rig has a custom designed Freq and PL tone signal injector (to make the old xtal rig work). It includes a green digital 1 to 16 readout to select one of 16 channels programmed with local freqs. Late Note: He drove it out to 41st and Sheridan for the Saturday night Simplex Net on .55 and heard everyone.

Larry W5LQF brought in some old ceramic plate mounted cheese slicers (variable capacitors) plus a genuine Dan Bosco Electronics ‘Stetho Tracer’ from the early 60s, a pen size demodulator and audio amp that lets you trace signals through a radio receiver. Don Bosco also made a similarly packaged simple square wave signal injector (that put out lots of harmonics) for ten bucks. The demodulator looked the same, pen sized, but came with accessories like a 20 dB attenuator, an earphone, and cost a hundred a fifty bucks, an armful back in the 1950s. Larry’s example looked pristine and had the original paper manual.

Mike KI5YX brought in a TEKTRONIX 2224 digital storage scope to show. Nxt mtg is 2nd Thurs in May. See you on 146.91