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Date:
Thu, 10 Feb 2011 21:04:01 -0700
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For blind ham radio operators <[log in to unmask]>
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For blind ham radio operators <[log in to unmask]>
From:
Gerry Leary <[log in to unmask]>
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Hmmm, Well I would check the connection at the ground, and maybe try moving 
the Power Supply temporarily to see if that helps.
----- Original Message ----- 
From: "tom behler" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Wednesday, February 09, 2011 5:46 PM
Subject: Re: grounding solution for 20 m


>    Gerry:
>
> All of my grounds go to a common ground lug on my window ffeed through
> panel, and that ground lug is coupled to an outside connection where my
> ground wire goes to a ground rod.
>
> I have every reason to suspect that the ground is still working, because I
> get very little RFI anywhere, as compared to what I used to get in the
> Louisville rental house where I didn't have a ground.
>
> 73 from Tom Behler:  KB8TYJ
>
> ----- Original Message ----- 
> From: "Gerry Leary" <[log in to unmask]>
> To: <[log in to unmask]>
> Sent: Wednesday, February 09, 2011 9:26 AM
> Subject: Re: grounding solution for 20 m
>
>
> Hey Tom,
>
> A couple of other ideas.  How are all of your grounds connected together?
> And is the connection at the ground side outside still good?  Are all of 
> the
> ground connections on the equipment tight?  Could the ground leads be 
> moved
> away from other wires?  If you have a keyer maybe move its leads around.
> Gerry
> ----- Original Message ----- 
> From: "tom behler" <[log in to unmask]>
> To: <[log in to unmask]>
> Sent: Tuesday, February 08, 2011 7:55 PM
> Subject: Re: grounding solution for 20 m
>
>
>>        Sounds great, Gary. ... Thanks!
>>
>> 73 from Tom Behler:  KB8TYJ
>>
>> ----- Original Message ----- 
>> From: "Gary Lee" <[log in to unmask]>
>> To: <[log in to unmask]>
>> Sent: Tuesday, February 08, 2011 8:29 PM
>> Subject: Re: grounding solution for 20 m
>>
>>
>> yep.  Just make sure they are not touchable.
>>
>> I suspect that it is your power supply shutting down.  I have had the =
>> same thing.
>>
>> The counterpoise will help with that.  chokes as well, but  I would run =
>> the wire anyway.
>> Just run it around your baseboard, and maybe stuff the ends into a =
>> tennis ball or some such.
>>
>> On Feb 8, 2011, at 6:43 PM, tom behler wrote:
>>
>>>        Gary:
>>>=20
>>> Thanks for the careful calculations.
>>>=20
>>> My question is:
>>>=20
>>> What do I do with the other ends of the wires?
>>>=20
>>> Just let them hang somewhere, being sure they are out of range of =
>> being=20
>>> touched by someone?
>>>=20
>>> 73 from Tom Behler:  KB8TYJ
>>>=20
>>> ----- Original Message -----=20
>>> From: "Gary Lee" <[log in to unmask]>
>>> To: "tom behler" <[log in to unmask]>
>>> Sent: Tuesday, February 08, 2011 9:34 AM
>>> Subject: grounding solution for 20 m
>>>=20
>>>=20
>>> Tom:
>>>=20
>>> All you need to do is cut a 1/4 wave length of wire, preferrably =
>> something
>>> fairly heavy for the freq of interest.
>>> Remember that insulated wire has a velocity factor of around 95%.
>>> so, for the net freq, 300/14.258 =3D 21.041.
>>>=20
>>> This is in meters, so * 39.37 inches per meter =3D 828.377. Now * =
>> velocity
>>> factor 95% =3D 786.96 inches / 12 inch per foot =3D 65.58 / 4 =3D =
>> 16.395.
>>>=20
>>> Now take the decimal portion and multiply by 12 =3D 4.75 near enough.
>>>=20
>>> so a length of wire about 16 feet 5 inches will be a resonant quarter =
>> wave
>>> on the blind hamns net frequency.
>>> Tie this to your ground on the rig and another for your amp.
>>> Be sure to insolate the far ends well.
>>>=20
>>>=20
>>> Hope this helps.
>>
> 

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