Jimmie D wrote:
Just a memory from tens of years ago:

The 7360 made a decent balanced modulator, but it is,
by definition, extremely sensitive for external electric
and magnetic fields.

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Tauno Voipio (OH2UG)
tauno voipio (at) iki fi


You just answered a problem thats had been nagging me for over 30 years.
Now I know why the SSB transmitter I built had such an annoying hum in it.

I never thought about it being affected by a magnetic field.

Jimmie



Think about a magnetically-deflected TV picture tube.

I noticed the problem, when my Eico 753 (around 1968) worked
fine when the power supply was on the right side, but had
a rough hum reported by other stations, if the power supply
box was moved to the other flank.

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Tauno Voipio (OH2UG)