[TowerTalk] Vertical balun

[Don Havlicek]

Jim,
His comment/query concerned the common mode current on the feedline if 
it is in the radial field.
I'm waiting for comments about balun.
Don
N8DE

Jan Erik Holm wrote:
> Why a balun?
> 
> 73 Jim SM2EKM
> --------------
> 
> Don Havlicek wrote:
> 
>> Tom,
>> Good question!
>> I never used a balun on the 80m vertical, but might when I replace the 
>> coax this Spring.
>> I'll be interested in reading the responses to your query.
>> Don
>> N8DE
>>
>> Tom Champlin wrote:
>>
>>> The recent discussion of ground radials has been a big help for me. 
>>> There is just one other thing that bothers me. Most hams would 
>>> probably either run buried PVC to put the feed line in, which would 
>>> of necessity be parallel with the nearest buried radials. Even if 
>>> everything was above ground, my question would be the same. Assuming 
>>> it would be desirable to use some kind of balun on the coax before or 
>>> at the vertical feed point, possibly a W1JR toroid type, or some 
>>> ferrite beads. The object being to keep RF from running back to the 
>>> shack on the coax braid.
>>> So, would one want to place this balun past the radial field but 
>>> before the feed line gets close to the house or right at the antenna, 
>>> or does it matter?
>>> Tom W0HH
>>> _______________________________________________
>>>
>>> See: http://www.mscomputer.com  for "Self Supporting Towers", 
>>> "Wireless Weather Stations", and lot's more.  Call Toll Free, 
>>> 1-800-333-9041 with any questions and ask for Sherman, W2FLA.
>>>
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>>
>>
>> _______________________________________________
>>
>> See: http://www.mscomputer.com  for "Self Supporting Towers", 
>> "Wireless Weather Stations", and lot's more.  Call Toll Free, 
>> 1-800-333-9041 with any questions and ask for Sherman, W2FLA.
>>
>> _______________________________________________
>> TowerTalk mailing list
>> TowerTalk at contesting.com
>> http://lists.contesting.com/mailman/listinfo/towertalk
>>
> 
> 
> _______________________________________________
> 
> See: http://www.mscomputer.com  for "Self Supporting Towers", "Wireless 
> Weather Stations", and lot's more.  Call Toll Free, 1-800-333-9041 with 
> any questions and ask for Sherman, W2FLA.
> 
> _______________________________________________
> TowerTalk mailing list
> TowerTalk at contesting.com
> http://lists.contesting.com/mailman/listinfo/towertalk
>