Jim,
Are you referring to this: http://www.audiosystemsgroup.com/RFI-Ham.pdf ?
That is 66 pages of stuff that would take an EE degree to fully
understand. Or are you referring to a much more condensed version? If
so, please provide the link.
It is far easier for most hams to purchase/make the isolation circuits,
though I would agree with you that eliminating the ground loops by
proper techniques is the best approach. I accomplished that in one
station location, even adding technical grounds, but it is not an easy
task. I have not yet been able to do it at my other operating position
because of its second floor position and distance from the breaker panel
(and no I'm not replacing all my plastic conduit embedded in reinforced
concrete walls with metal conduit now, hi hi!).
vy 73,
Casey, TI2/NA7U
cloud-warmer.blogspot.com
On 10/28/2011 12:00 PM, Jim Brown wrote:
> On 10/28/2011 10:03 AM, Frank wrote:
>> While transformer isolation of audio inputs and
>> outputs along with opto isolated PTT lines might seem like overkill,
>> they do avoid possible problems caused by ground loops and electrical
>> incompatibilities.
> Transformer isolation and opto-isolation are totally un-necessary if you
> follow the simple AC power and bonding rules in the two tutorials I
> cited in the headphone thread.
>
> 73, Jim Brown K9YC
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