Hello- Anyone in our group have knowledge of replacing the motor on a
centrifugal cooling blower? I have been rebuilding a few RF decks made in the
1970's by Scientific Radio for the SR-416A transmitter. These RF decks are a
copy of the Eimac W6PO 144 Mhz design using 8877 tube. They use a Kooltronics
blower with 5" wheel and square outlet with mounting hole centers 2-5/8" apart
in a square pattern. I have bearing noise and vibration in a few of my motors.
The motors are sealed bearing Kooltronic #7162-082 type U62, 115 VAC @ 1.55
amp, using 4 ufd capacitor. 2850 RPM at 50 Hz, 3400 RPM at 60 Hz. After
looking at prices of replacement blowers/motors I was shocked. Can I replace
the bearings in these motors? Or just buy new motors somewhere? I really do not
need the performance of these blowers, the transmitters were running at 1 KW
24/7 and I am just doing SSB/CW. Sure could stand to reduce the blower noise
some. Thanks,Byron W5FH
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