Andy,
I've made them with RG 8 type, such as RG 213, and also with RG 8x, but
have never used RG 58 anywhere in my station. I suppose the choking
action would be the same, but loss is very high in that type of coax.
Whatever the loss is in the length of coax used is still there even though
it is now wrapped into a 6 inch coil.
Perhaps RG 58 would be good in a portable or back packing situation, or for
experimentation just to see if it works, but it wouldn't be my first
choice.
73, Steve KW3A
----- Original Message -----
From: "andy m0ceg" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Saturday, March 31, 2007 7:49 AM
Subject: Re: Coax made balums
> Steve I forgot to ask does it mater what coax I use? RG58 OR H213
> ----- Original Message -----
> From: "Steve Forst" <[log in to unmask]>
> To: <[log in to unmask]>
> Sent: Friday, March 30, 2007 11:58 PM
> Subject: Re: Coax made balums
>
>
>> Andy,
>>
>> One option is to make a coax choke balun. 8 or 10 turns of coax around
>> a
>> 6 inch diameter form. Use a 6 inch diameter can or jug or whatever,
>> which
>> you will remove after winding the 10 turns. Wind them kind of on top
>> of
>> each other and not side by side. After removing the 6 inch can,
>> secure
>> the coil of coax with plastic ties or tape several places around the
>> coil
>> to keep it in place.
>>
>> This choke will keep RF from flowing on the shield of the coax at HF.
>> This
>> will require about 25 feet of coax to make as described above.
>>
>> 73, Steve KW3A
>>
>>
>> ----- Original Message -----
>> From: "andy m0ceg" <[log in to unmask]>
>> To: <[log in to unmask]>
>> Sent: Friday, March 30, 2007 4:21 PM
>> Subject: Coax made balums
>>
>>
>>> Hi all, Please could anyone direct me to a website that deals with my
>>> question? I want to find out how to make a balum from coax I have seen
>>> this done but lost the instructions for doing it.
>>> Regards
>>>
>>> Andrew Shipp
>>>
>>> Located Northampton Northamptonshire UK
>>>
>>> Home phone...+44]0,1604 517007
>>>
>>> Mobile 07983598287
>>> Skype name...andyshipp55
>>>
>>> Ham callsign M 0 C E G
>>> Echolink node 220344
>>>
>>>
>>>
>>
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>>
>
>
>
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