I will not call it an electric shock. But it is a small kind of
quivering.
Because of my bad QTH I move my rig to other locations for participate
in different contests. Therefore, the grounds can be different on
different locations. It can also be a problem to find a plug with ground
in DK. Mostly all home locations in DK do not have a ground in the
electricity plugs.
When I move to a fixed QTH where I can place my rig, I will make
electricity with ground. I also do have an ETO that works best with
ground.
I have just put out this e-mail to warn others. I may not be the only
person that can have this problem.
Thanks for all the comments regarding to solve the problem. I now know
how to do it correctly the right way and will not make such errors
again.
Vy 73 de OZ0J, Jørgen
-----Oprindelig meddelelse-----
Fra: yaesu-admin@contesting.com [mailto:yaesu-admin@contesting.com] På
vegne af Wiley Sanders
Sendt: 19. januar 2003 21:37
Til: yaesu@contesting.com
Emne: [Yaesu] Re: Mark-V - WARNING!!
> I can still feel a quivering between the radio and the PC
You mean you feel an electric shock when touching the rig and computer
at the
same time? You may have dangerous safety problem, like an open ground on
the
rig, PC, or the house wiring. If the rig and PC are grounded together
you
should have 0 volts potential between them (not 0.1! - 0.0!). Have you
measured the potential of each piece of equipment to ground? Is the AC
ground
in your house functioning?
It's normal for there to be some leakage from the power supply inlet
filter
caps, and most equipment floats at a few AC volts above ground but its
pretty
unusual for the leakage to be large enough to shock. My old FT-101
floats
about 30V above ground - but I added a 3rd safety ground lead to the
power
supply cord, and I also have it securely grounded to the ground rod
right
outside the shack. If I was really serious I would replace the filter
caps
inside the chassis with newer less leaky ones (and add a choke in the
lines
for a true LC filter.)
My laptop floats about 14VAC above ground too - when I operate PSK31 or
RTTY
is has to be grounded to the rig or there is a huge AC hum in the audio.
-Wiley KF6IIU
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