Quote:
Originally Posted by cletrac
Now as to the 19 sets, is there much difference between the MkII and the MkIII?
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There are a lot of little differences, usually things added to the later Mk.III. The biggest difference is that the Mk.II has a noisy electric motor providing the required voltages and it runs all the time. The Mk.III has the same noisy motor that kicks in when you transmit or need it but otherwise runs on a quietly humming vibrator.