I bought an ac line isolation transformer for my workbench at work
some years ago. The building had a horrendous ac line noise and
ground faults which mgmt was not willing to pay to correct, so this
got the test equipment grounds isolated to avoid discharges into open
ckts when using test probes or solder iron. Certainly not an ideal situation.
You should not use this solution at home (dangerous). Fix your
grounding system, instead.
Re: antistatic pads: best to use one in doubt. But I would not
connect anything to the green wire system. I have antistatic solder
station so know its safe, and always work on unpowered ckts -
disconnected equipment wiring from PS.
That being said I have done considerable repair and assembly without
a pad but using just a wrist strap. Sometimes not even that. I've
gotten to know which devices one does not risk and those that appear
more durable. But I keep the devices in their antistatic bags until
they are installed. I touch my tools to chassis ground before
picking the device up and immediately place the device into position
for soldering - minimize handling, if possible. RF power devices
"seem" more durable than small-signal devices (but they are more
expensive). Always use antistatic pad/straps when installing preamp devices.
I detest synthetic clothes so that is not an issue -cotton for
me. Be careful of wool clothing. I'm also lucky because our climate
is usually humid. Only in deep winter extreme cold will lower
humidity to levels where you draw sparks from everything you touch -
not a good time to build anything. But if you sit down use
antistatic devices and not get up walking around during your
sensitive work it should be OK. Best advice is to limit the duration
of exposure for the device - beating the odds.
73, Ed - KL7UW
"Kits made by KL7UW"
Dubus Mag business:
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