I don't recall seeing anything where the braid was not connected.
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-----Original Message-----
From: towertalk-bounces@contesting.com
[mailto:towertalk-bounces@contesting.com] On Behalf Of Jim Brown
Sent: Monday, May 24, 2010 9:59 AM
To: Tower Talk List
Subject: Re: [TowerTalk] coax stubs /bandpass filter
Hi Rag,
What page and photo or schematic are you looking at? Its been a few months
since I looked through his book, but I dont recall any circuits where stubs
were not somehow connected in parallel with the line.
73,
Jim K9YC
On Mon, 24 May 2010 15:57:05 +0200, Stein Roar Brobakken wrote:
>Hi Jim
>I got his book from W2JVN now, but there is two schematic I think looks
>like the shield of the stubs is just connected shield to shield and NOT
>further to a BOX f.ex. to empty can with SO-239 on top...
>Am I right what I see ??? that the shield of the coaxstubs is not mixed
>to the shield of the coax from PA ? its not look that on pictures I
>seen from others...
>This is late into the book when you have 2nd Harmonic stubs in
>inverted-V shape, and the shield is just connected into the top of
>where the coax meets ....???
>73 LA6FJA Rag
>-----Opprinnelig melding-----
>Fra: towertalk-bounces@contesting.com
>[mailto:towertalk-bounces@contesting.com] P vegne av Jim Brown
>Sendt: 29. mars 2010 09:37
>Til: towertalk@contesting.com
>Emne: Re: [TowerTalk] coax stubs /bandpass filter
>On Mon, 29 Mar 2010 08:58:24 +0200 (MEST), Stein Roar LA6FJA-K3RAG wrote:
>>Hi
>>I have made a set of coaxstubs for bandpass filter, but it is not
>>enough
>attunation..
>>Is it normal with 20-30 db attunation ??
>Yes. See http://audiosystemsgroup.com/Coax-Stubs.pdf This is a first
>draft tutorial that I'm still working on.
>>We had big problems during WPX SSB as LN5O we experienced that the
>>stubs
>didnt
>attunate enough between 20 40 & 15m...
>You need to buy W2VJN's excellent book on this topic. You can order it
>for $20 from Inrad (the filter people). Also, there are several very
>useful articles by N0AX in QST. They are referenced in the tutorial
>(link above).
>73,
>Jim K9YC
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