Looks like a standard transistor output slotted optical coupler. There should be plenty of alternatives.
Try something like this: http://www.newark.com/optek/opb360t51/optical-sensor-switch-transmissive/dp/83F1146 3 bucks from Newark. On 10-Apr-10 19:47, Arthur Delibert wrote:
I have an RV75 synthesized VFO that has suddenly stopped tuning up in frequency. No matter which way you turn the knob, the receiver tunes down in frequency.
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