Here is a g trick we use to use years ago.  For a long ground wire, take 
a piece of coax, use center wire for the actual ground, and bypass each 
end to the shield with a .001 cap.  It works.
73
Butch
WA0VJR

On Tue, 8 Feb 2011, Lloyd 
Rasmussen wrote:

> I think that the 4.7 pF capacitor is bogus.  The capacitance between center
> conductor and shield of even a few inches of coax is more than that.
>
> But creating a quarter-wave ground "counterpoise" connected to the station
> ground often helps, as mentioned in a previous message.  The far end of the
> wire might be hot, so don't put it where people are likely to come in
> contact with it.  For 20 meters, a quarter wavelength is about 16 feet.
> This would be the length from whatever you consider to be your station
> ground; perhaps the back of your amplifier.
>
> Lloyd Rasmussen, Kensington, Maryland
> Home:  http://lras.home.sprynet.com
> Work:  http://www.loc.gov/nls
>
>> -----Original Message-----
>> From: For blind ham radio operators [mailto:[log in to unmask]]
>> On Behalf Of Gale Conard
>> Sent: Tuesday, February 08, 2011 12:17 AM
>> To: [log in to unmask]
>> Subject: Re: interesting RF problem in the shack
>>
>> Here is something I saved from a previous discussion about grounding.  I
>> haven't tried it, but several hams have testified that it has worked for
>> them.
>>
>>
>>
>> Hi list:
>> i think it was John who was saying that he has some grounding problems
>> being on the second floor.
>> I found a good method of helping to get rid of some of the floating
>> ground problems.
>> You use a peace of RG58 coax and put a 4.7  peaka farad seramic
>> capacitor across between the ground shield and center line of the coax =
>> on each end of the length you will need to go from your station to your
>> ground rod or an adequet ground somewhere.  Connect the center line of
>> the coax to ground and the center of the other end to the radio or to
>> your common station ground in the shack.  This is supposed to help to
>> eliminate floating ground and keep all the extra RF going to ground
>> instead of coming back up your ground line.
>> Regards
>> Colin
>> ----- Original Message -----
>> From: "tom behler" <[log in to unmask]>
>> To: <[log in to unmask]>
>> Sent: Monday, February 07, 2011 7:57 PM
>> Subject: Re: interesting RF problem in the shack
>>
>>
>>     Steve:
>>
>> I used this exact same set-up out in Colorado before I came back to
>> Michigan, and before I installed the Windom.  In fact, it's what I ran the
>> Cross-country Blind ops net with last year, without a grounding system at
>> all.
>>
>> The only thing I can think of that is different here in Michigan would be
>> the Windom installation itself.  But, the Windom is on a completely
>> different antenna port on my Window feed through panel, and on my TenTech
>> manual tuner.
>>
>> I will try grounding the rig-runner by connecting it to the common ground
>> in
>> the shack, and will also try your ferrite solution.
>> Admittedly, before the Windom became unusable, I don't think I ever used
>> the
>> DXCC back here in Michigan on 20 meters ever since we returned.  Therefore
>> it's inpossible for me to tell if the problem existed before without my
>> knowing it.
>>
>> 73 from Tom Behler:  KB8TYJ
>>
>>
>>
>> ----- Original Message -----
>> From: "Steve Forst" <[log in to unmask]>
>> To: <[log in to unmask]>
>> Sent: Monday, February 07, 2011 9:33 PM
>> Subject: Re: interesting RF problem in the shack
>>
>>
>> Tom,
>>
>> Grounding might not be a bad idea. Also,  if you have any ferrites
>> around, I would try clamping a ferrite on the line from the power supply
>> to the rig runner, and also the line from the rig runner to the radio.
>>    Maybe disconnect any other gear that is connected to the rig runner
>> to try and isolate the source.   Perhaps move the rig runner as far as
>> possible away from the amp.
>>
>>
>>
>> Have you worked that combo of antenna/amp/band before?  Did this just
>> pop up out of the clear blue?  If it worked fine before and now has
>> problems, what has changed in the station that you can  try reversing?
>>
>>
>> And I thought I had problems...
>>
>> 73, Steve KW3A
>>
>> On 2/7/2011 8:58 PM, tom behler wrote:
>>> Hi, all.
>>>
>>> Well, I know I'm going to get varying opinions on this one, but that's
>> ok,
>>> since I'm looking for a number of possible alternative causes and
>>> solutions.
>>>
>>> As many of you know, I have gone back to using my Alpha Delta DXCC
>> antenna
>>> as my HF antenna, until my Windom, which took a dump on Saturday, can be
>>> resurrected.
>>>
>>> The DXCC works great on 40 meters with both 100 wattts, and my Ameritron
>>> AL811H amplifier.  However, when I went to do the Cross-Country blind
>> ops
>>> net on 14.258 yesterday, I had an interesting experience.  Things worked
>>> great with 100 watts, but when I kicked the amplifier in, and tried
>>> running
>>> things on the usual 600 watts, I ran into problems.  As soon as I keyed
>>> the
>>> mic, the protective circuit in my Rigrunner tripped, and everything in
>> my
>>> station went silent.
>>>
>>> I have no other indications of RFI anywhere else in the house or the
>>> shack.
>>> In addition, my SWR's are good with the DXCC on 20 meters (about 1.5 to
>> 1)
>>> without the tuner, and obviously just as good with the manual tuner.  I
>>> use
>>> my usual procedure to tune the amp, and everything works there as well,
>>> giving me forward and reflected power readings I would expect.
>>>
>>> Could anyone tell me what you think is going on here?  Do I still have a
>>> grounding issue of sorts, even though I've gotten no indication of
>>> grounding
>>> issues with other applications?
>>>
>>> Other than reducing power, is there anything anyone can suggest for me
>> to
>>> do
>>> to try to solve this problem.
>>>
>>> I was thinking of grounding the Rigrunner by connecting a ground cable
>>> from
>>> the cover of the Rigrunner to my common station ground, but just haven't
>>> gotten to it yet.
>>>
>>> It's just a strange problem, and only seems to occur on 20 meters with
>> the
>>> amp.  I never had the problem at all out in Colorado, where I had no
>>> station
>>> grounding system at all.
>>>
>>> 73 from Tom Behler:  KB8TYJ
>>>
>> 73,
>>
>>
>>
>> Gale
>> [log in to unmask]
>
>