[Amps] Any QRO Ops wearing defibrilators

[Jim Brown]

On 11/18/2011 1:09 PM, Roger wrote:
> Today the doc told me I need to have a defibrillator implanted. However
> when I look at the restrictions they li

Hi Roger,

I'm not an expert on the medical device side of this, but there are two 
fundamental concerns.  First, is RF, and what matters is where your 
ANTENNAS are, not where your transmitter is. Frequency also matters -- 
at what frequency is the wiring in the unit, and it's connection(s)  to 
your body a good RX antenna?  The answer there, of course, is at VHF and 
or UHF. Second is the MAGNETIC FIELD from a big power transformer, like 
the power supply for your power amp. That's good old 60 Hz, and the 
defrib would be sensitive to that if it contained wiring in a loop (poor 
design). .So I suggest that you check with the mfr of the device with 
those thoughts in mind.   I have heard in the past that these issues are 
not a great concern for HF, but better safe than sorry.

73, Jim K9YC