09-17-2022, 07:36 PM
keefer,
you can easily check AAR vibrator, or any other for that matter, in the radio. locate the rectifier tube, a number 84, and find the 2 pins connected by a 7500uuf cap. that's the so-called buffer cap, part no.63 on the schematic. if the vibrator is working, the voltage to ground at each pin will be roughly 300V AC. or check the DC voltage at the other 3 pins. you should get 0, 6 and 200+.
i'll make a diagram of my modification of the vibrator that david sent. and also a diagram of a tester for the AAR vibrator.
you can easily check AAR vibrator, or any other for that matter, in the radio. locate the rectifier tube, a number 84, and find the 2 pins connected by a 7500uuf cap. that's the so-called buffer cap, part no.63 on the schematic. if the vibrator is working, the voltage to ground at each pin will be roughly 300V AC. or check the DC voltage at the other 3 pins. you should get 0, 6 and 200+.
i'll make a diagram of my modification of the vibrator that david sent. and also a diagram of a tester for the AAR vibrator.
![[-]](https://philcoradio.com/phorum/images/bootbb/collapse.png "[-]")
