[TowerTalk] Fwd: [Bulk] Re: BALUN revisited again

Fri Apr 8 19:31:50 EDT 2016

Bert,

Very interesting idea. Try it! I guess you should stack a couple of different toroides on top of each other and check it on an analyser. Please let us know your result.

Hans - N2JFS

-----Original Message-----
From: Bert Almemo <balmemo at sympatico.ca>
To: 'Grant Saviers' <grants2 at pacbell.net>; 'Kelly Taylor' <ve4xt at mymts.net>; 'Patrick Greenlee' <patrick_g at windstream.net>
Cc: towertalk <towertalk at contesting.com>
Sent: Fri, Apr 8, 2016 2:36 pm
Subject: Re: [TowerTalk] [Bulk] Re:  BALUN revisited again

As I was reading the post I was wondering if you could use ferrites of
different mix in the same choke/balun? Would that work or not? I've read
Jim's/K9YC excellent paper on chokes and baluns, but I couldn't find any
mentioning about different material in the same choke. Just curious.

73 Bert, VE3NR

-----Original Message-----
From: TowerTalk [mailto:towertalk-bounces at contesting.com] On Behalf Of Grant
Saviers
Sent: Friday, April 08, 2016 9:59 AM
To: Kelly Taylor; Patrick Greenlee
Cc: towertalk at contesting.com
Subject: Re: [TowerTalk] [Bulk] Re: BALUN revisited again

It is difficult to make a single choke for 40 to 6m but it is easy to 
put two in series on the feedline.  The K9YC tutorial has designs for 40 
to 10m and 6m.  I like using multiple type 43 or 31 small clamp ons for 
VHF, see the appendix for the recommendations.

Also, G3TXQ has a nice summary chart for chokes at 
http://www.karinya.net/g3txq/chokes/

Grant KZ1W

On 4/7/2016 12:18 PM, Kelly Taylor wrote:
> Hi Patrick
>
> The benefits of a choke go beyond what happens on TX. A choke can also cut
down RX noise.
>
> If you read k9yc's material, you'll see a choke does not need to be
complicated or expensive. Using his data, I made one that was nothing more
than 8 turns through a Biggest Clamp-on.
>
> As well, your contact's suggestion ignores the fact most antennas that
need chokes already have feedlines departing at 90 degrees.
>
> 73, kelly, ve4xt
>
> Sent from my iPhone
>
>> On Apr 7, 2016, at 1:50 PM, Patrick Greenlee <patrick_g at windstream.net>
wrote:
>>
>> Thanks every one for your replies.  I was misinformed, the adjustable
elements are just a tad over 17 feet when extended.
>>
>> I did get one suggestion from a contact in Colorado who said if the
feedline comes well away from the antenna on the midline at right angles to
the antenna just hook it up sans chokes or baluns and go for it, especially
on QRP.
>>
>> Good info.  You guys have covered all areas.
>>
>> Thanks everyone.
>>
>>
>> Patrick        NJ5G
>>
>>> On 4/7/2016 1:07 PM, Jim Brown wrote:
>>> Yes.
>>>
>>> 73, Jim
>>>
>>>> On Thu,4/7/2016 9:54 AM, TexasRF--- via TowerTalk wrote:
>>>> Great answer but applies to a different question. Perhaps to the
original
>>>> posting that you deleted?
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