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REFURBISHMENT and VERIFICATION of the HEATHKIT TT
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... Connect the leads of an AC voltmeter to SX21 (see Figure) and CD1 (see Figure)  (use the 150 volt range or higher). Turn the  instrument  ON  and  adjust the line  voltage (pull down the LINE TEST switch and adjust the meter to the LINE CHECK  arrow with the SET LINE control). For all voltage posit ...
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Metadyne



A metadyne is a direct current electrical machine with two pairs of brushes. It can be used as an amplifier or rotary transformer. It is similar to a third brush dynamo but has additional regulator or ""variator"" windings. It is also similar to an amplidyne except that the latter has a compensating winding which fully counteracts the effect of the flux produced by the load current. The technical description is ""a cross-field direct current machine designed to utilize armature reaction"". A metadyne can convert a constant-voltage input into a constant-current, variable-voltage output.
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