10-23-2023, 04:59 PM
Personally, with an unknown radio, I use isolation transformer with any type whatsoever.
1. Possible leakage / breakdown, when the transformer itself is working. Rare but possible.
2. Those Y-caps (the AC input filter) going from one of the AC plug wires to Chassis. Their values are way over what today's regulations allow for the touch current. Won't kill but might deliver a nasty sting.
Philco16 for you. The chassis will float at 60V when ON, at 0V when Off and the Neutral pin faces Neutral, and at 120V when the Neutral pin faces Hot (non-polarized plug).
And Philco 66. Always under the potential.
The touch current in the latter case is 0.67mA rms or 0.96mA peak. It won't kill you but you will feel it. Medical equipment is required to be down to 0.3mA rms.
I am better safe than sorry.
1. Possible leakage / breakdown, when the transformer itself is working. Rare but possible.
2. Those Y-caps (the AC input filter) going from one of the AC plug wires to Chassis. Their values are way over what today's regulations allow for the touch current. Won't kill but might deliver a nasty sting.
Philco16 for you. The chassis will float at 60V when ON, at 0V when Off and the Neutral pin faces Neutral, and at 120V when the Neutral pin faces Hot (non-polarized plug).
And Philco 66. Always under the potential.
The touch current in the latter case is 0.67mA rms or 0.96mA peak. It won't kill you but you will feel it. Medical equipment is required to be down to 0.3mA rms.
I am better safe than sorry.
People who do not drink, do not smoke, do not eat red meat will one day feel really stupid lying there and dying from nothing.
![[-]](https://philcoradio.com/phorum/images/bootbb/collapse.png "[-]")
