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Re: [CQ-Contest] Bravo - CQ

To: k9yc@arrl.net, cq-contest@contesting.com
Subject: Re: [CQ-Contest] Bravo - CQ
From: Pete Smith N4ZR <n4zr@contesting.com>
Date: Thu, 25 Jun 2015 21:15:05 -0400
List-post: <cq-contest@contesting.com">mailto:cq-contest@contesting.com>
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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