On 8/2/2014 5:57 PM, Jim Brown wrote:
On 8/2/2014 12:07 PM, Carl wrote:
Put the amp in another room or seperate it from you by a grounded
screen wall/enclosure....never give up the amp!
A grounded screen wall/enclosure shields only the electric field and
the EM field. It is completely ineffective for magnetic shielding, and
that's the potential hazard of the amp.
Jim, most "present day" cardiac pace makers and defibrillators are
pretty much immune to RF except at their link and internal operating
frequencies. The ones developed by Cleveland clinic, which I have had
no limitations as to ham radio frequencies, or welding. They did
recommend routing the cables away from your core.
Typically the cables would run lengthwise with your body. They
recommended not to do that, but to bring them in from the side. They
actually have a tutorial on welding.
The only real restriction was to not carry a cell phone in your shirt
pocket over the pacemaker/defib.
I've been welding, using a plasma torch and operating HF for nigh onto
10 years with no problems.
BTW the amp is between 2 to 3 feet from me.
73
Roger (K8RI)
73, Jim K9YC
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