Tony , I should think it will be ok , may be will need a little rf
screening ... as a Idea try using a coax as the plate
supply cable , with the braid earthed ... the copper 'should'
not affect the magnetic field ... try it out with a low voltage
psu and resistor as a load ?

G ..

I will try but I would not expect RF problems because the Hall transducer will
be located inside the modulator screened enclosure and inserted before the
modulation transformer where there is plenty of bypass capacitance to ground.

73

Tony I0JX