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    ASTEC Modulator

    I have a small Astec UHF modulator that does work ,the oscillator has stopped running I have checked everything in the circuit and cannot find anything obviously faulty. Its pretty simple looks like a common base transistor circuit.
    I am wondering if the gain of the transistor is too low for it to work ( gain figure of 29 seems to be in the back of my mind).
    Does any of you guys have any ideas or info that might help?

    thanks

    Barry
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