07-23-2014, 11:50 PM
It depends on how the front end of the set is wired, in most sets the ground for the antenna coil is connected to the chassis ground or common negative, in some sets it's independently grounded. Also in some earlier set the volume control is in the antenna circuit so it will not function properly without an external ground.
I don't find that whether a set has a line capacitor or an electrostatic shield in the transformer makes much difference with the performance. Almost none of the Philcos had an electrostatic shield in the transformer, while all of the RCA and G.E sets I have did and having an external ground connected to the set did make much difference to either one other then cutting down on the noise. However on a Westinghouse 801 that I was working on the antenna coil was NOT grounded to the chassis and adding a ground improved the performance at least 30%
Regards
Arran
I don't find that whether a set has a line capacitor or an electrostatic shield in the transformer makes much difference with the performance. Almost none of the Philcos had an electrostatic shield in the transformer, while all of the RCA and G.E sets I have did and having an external ground connected to the set did make much difference to either one other then cutting down on the noise. However on a Westinghouse 801 that I was working on the antenna coil was NOT grounded to the chassis and adding a ground improved the performance at least 30%
Regards
Arran
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