Yep...agree...all points...
Cecil
Sent from my iPad
> On May 16, 2014, at 10:45 AM, "Bob McGraw - K4TAX" <RMcGraw@Blomand.net>
> wrote:
>
> Agreed with your points. However the statement I originally addressed is;
> "the 3rd pin ground is not good lightning protection" or something to that
> fact. The 3rd pin system was never intended to be such.
>
> I'll revert to my manual from Motorola, all 513 pages of it, on the topic of
> ground system construction and integration. We must all agree that lightning
> protection and mitigation and grounding must be constructed as a system. It
> is not a thing and it is far from being as simple as a driven ground rod or
> rods with a conductor connected to ones radio.
>
> In conclusion the topic is much too broad to be adequately discussed in a
> venue such as a product related reflector.
>
> 73
> Bob, K4TAX
>
>
> ----- Original Message ----- From: "Cecil" <chacuff@cableone.net>
> To: "Discussion of Ten-Tec Equipment" <tentec@contesting.com>
> Sent: Friday, May 16, 2014 9:21 AM
> Subject: Re: [TenTec] Eagle problem?
>
>
>> I can agree with "All lightning protection must BEGIN outside the structure."
>>
>> But the fact is we, by the very nature of building a radio station, have
>> invited lightning inside by virtue of multiple copper paths. Our various
>> feedlines, rotor control cables, remote antenna switch cables etc..
>>
>> We have to build a last line of defense inside the shack to deal with, as
>> effectively as possible, whatever remaining strike potential makes it
>> through our outside defenses.
>>
>> Tying those two protection systems together is not inviting the energy
>> in...it's extending the protection all the way to the equipment we are
>> working so hard to protect.
>>
>> Of course there are two camps..I have a friend that believes don't ground
>> anything...including the tower....that encourages...invites a lightning
>> strike to occur.
>>
>> Everybody knows lightning seeks the best path to ground...
>>
>> I guess the best course is to do what makes one sleep best at night....
>>
>> Cecil
>> K5DL
>>
>>
>>
>>
>> Sent from my iPad
>>
>>> On May 15, 2014, at 3:49 PM, Robert <rmcgraw@blomand.net> wrote:
>>>
>>> All lightning protection must exist outside of the structure.
>>>
>>> Do nothing to invite lightning inside unless you desire a lot of damage.
>>>
>>> 73
>>> Bob K4TAX
>>>
>>>
>>>
>>> Sent from my iPhone
>>>
>>>> On May 15, 2014, at 3:39 PM, Brian Carling <bcarling@cfl.rr.com> wrote:
>>>>
>>>> AC 3rd pin is not going to be a very effective ground for protection from
>>>> lightning damage.
>>>>
>>>> Best regards - Bry Carling AF4K
>>>>
>>>>
>>>>
>>>>> On May 15, 2014, at 4:17 PM, Robert <rmcgraw@blomand.net> wrote:
>>>>>
>>>>> Braid is not the best choice for a low inductance RF path. It is
>>>>> although necessary for flexible applications.
>>>>>
>>>>> Personally I bond all equipment to the station supply and do not use
>>>>> anything but the AC 3rd pin for safety reasons.
>>>>>
>>>>> 73
>>>>> Bob, K4TAX
>>>>>
>>>>>
>>>>>
>>>>> Sent from my iPhone
>>>>>
>>>>>>> On May 15, 2014, at 2:20 PM, Carter <k8vt@ameritech.net> wrote:
>>>>>>>
>>>>>>> On 5/14/2014 5:56 PM, Stuart Rohre wrote:
>>>>>>> Some Yaecomwoods do suffer from RF entering the rig.
>>>>>>>
>>>>>>> MOST ANY rig will if you have a bad shield connection on coax jumper,
>>>>>>> or have rig too close to the antenna, (second floor shack), and there
>>>>>>> are many other rig and feedline issues to rule out in any RFI case.
>>>>>> True, can be many causes, but I am in a basement shack. Also, a few
>>>>>> years ago, I used a Drake TR-7 on SSB with everything else the same and
>>>>>> it worked fine. However, I realize that the TR-7 was not as
>>>>>> "computerized" (dependent on microprocessors) as the Omni VI.
>>>>>>>
>>>>>>> Rule of thumb: Power all equipment from same circuit breaker of the
>>>>>>> house. That ensures AC grounds will not be coming from widely
>>>>>>> different locations. IF you have to use a long ground wire for
>>>>>>> lightning protection ground on the station (like from second floor
>>>>>>> shack), consider that it could act as an "antenna" for pick up of RF
>>>>>>> from the real antenna. You may need tuned radials, or a radial for each
>>>>>>> favorite band.
>>>>>> Good tip and I believe I am on the same breaker for all the ham
>>>>>> equipment. Again, a basement shack and 5 or 6 feet of a single 3/4 inch
>>>>>> wide braid from the ground of each piece of equipment to the ground rod
>>>>>> right on the outside of the basement wall.
>>>>>>>
>>>>>>> You could always examine the quality of the grounding of the mike cable
>>>>>>> shield. Some older mike cords had just a multi-strand wire wrapped in
>>>>>>> one direction and not a hatch pattern wire shield. Some aluminum foil
>>>>>>> shields don't make a good low impedance connection by clamping.
>>>>>>> (Connections that can't be soldered are suspect).
>>>>>>
>>>>>> Should have mentioned this earlier, but back in the day before I used
>>>>>> any computer interface, I had the problem with both a TT 705(?) mic and
>>>>>> a Heil Pro headset. Probably unlikely that both were defective.
>>>>>>
>>>>>> 73,
>>>>>> Carter K8VT
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