Quote:
Originally Posted by SeanMcK
Is the significant difference between the Mk1's & Mk2's not the addition of the PF circuits in the latter?
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I have a couple of Model 7 Mk Is dating from 1950 and 1952 which have the P.F. sockets fitted, but all my Mk II examples of both the Model 7 and Model 40 have the P.F. sockets. I have read that P.F. sockets were available to special order for a time, presumably before Avo incorporated them as standard.
I also have some Model 7 Mk IIs which have black Bakelite screw-down terminals, rather than the red and black 4mm/screw down terminals which became standard later.
I have a wattage/power factor unit for the Model 7 but have never had cause to use it. Thanks to Andy Gilham for posting the circuit. My example looks pristine, and I don't think anyone else has ever used it either! This thread is encouraging me to try it out in anger...