Old radios, like the E.F. Johnson Messenger 1,2, or 223 came without a grounded chassis (3 prong cord). The chassis can become live, and it had a/c floating on the chassis already. I observed sparks when I put my coax to my meter's chassis, also I was feeling a "bite" from the chassis!
Here are the schematics for all 3 models' power supply.
![Greeen3prongJohnsonPowerScheme]()
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Here is how I currently have an E.F. Johnson Messenger 1 wired up:
![Current config.]()
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I have already...
A shocking good time, adding 3 prong power cord to vintage gear.
Here are the schematics for all 3 models' power supply.
.Here is how I currently have an E.F. Johnson Messenger 1 wired up:
.I have already...
A shocking good time, adding 3 prong power cord to vintage gear.