Begging your pardon, but I'm not confused, Jim. Such bonding may be
required in your locality, but here, in older houses, everything back to
2-wire knob and tube is permitted. Moreover, the size of the bonding
conductors often does not meet your specifications (you see, I did read
the presentation).
I acknowledge that the other topic, bonding within the station, is a
different matter. I've done a lot of that to solve AC hum issues, in
particular. The only point I was trying to make is that sometimes the
best can be the enemy of the good, and if a couple of isolation
transformers are an alternative to solving all of the pin one problems
you point out in modern station equipment, that may make sense.
73, Pete N4ZR
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On 6/25/2015 5:08 PM, Jim Brown wrote:
On Thu,6/25/2015 1:25 PM, Pete Smith N4ZR wrote:
But... many of us live in older houses, with iffy wiring and long
distances among entrances of various services, making the sort of
bonding you call for a major undertaking.
Hi Pete,
You're confused between bonding within the station and bonding for
lightning safety as required by Electrical building codes. The bonding
between grounded objects and entrances of wiring is REQUIRED BY LAW. I
had exactly such an old house in Chicago. Our shack "ground" MUST, BY
LAW, be bonded to those grounds. To not do it is unsafe. The minimum
requirement is via the Green wire in the AC power system. Better (for
lightning safety) to run a perimeter ground to connect those separated
grounds .
By comparison, a couple of 5-buck isolation transformers make a lot
of sense for the particular purpose Ed described.
Power distribution and bonding inside the shack is what eliminates the
need for audio transformers.
73, Jim K9YC
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