Re: Heathkit Valve Voltmeter - a tale or woe, suffering and utter misery etc.etc.
Heath had also a production site in England at Gloucester and IM 28 was made there by model name IM28U (U= UK?) In this model the movement's F.S. current is 200uA.
Pls. look at pictures.
In the picture of chassis the tubes are replaced by transistors and diodes. Those are not factory assembled but by final user, which have quite many of IM28s in use on the production lines as test instruments.
Regards
Ake
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