RE: OS Minitron 12 channel reed
It is good to see your OS Minitron reed system working, well done. I also have an OS Minitron reed system, a 10 channel one. After some recently completed service work I have it fully working. Simultaneous operation of any left side channel with any right side channel should be possible, such as up elevator and rudder together for a spin. After replacing a dead germanium transistor in one of the audio oscillators I have the simultaneous operation working well. As otrcman says you get some distinctive beating sounds from the two different reed frequencies.