In a message dated 9/22/2008 10:41:01 AM Central Daylight Time, satkins@inetdesign.org writes:
Subj: [amsat-bb] Duplexer for Sats Date:9/22/2008 10:41:01 AM Central Daylight Time From:satkins@inetdesign.org To:amsat-bb@amsat.org Received from Internet:
Hello everyone. I've worked AO-51 a few times so I'm not a total newbie. Just joined the list here to ask about building my own duplexer for working the sats. Awhile ago I found a page that described how to build one using a pencil to wind the inductors. It was a really small duplexer using RG-174 and SMC connectors. Does anyone know where I might find this web page? Or have instructions for building a duplexer?
Thanks
Stephen Atkins VE6CPU _______________________________________________ Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
Stephen,
Check this out: http://www.wa5vjb.com/references/Cheap%20Antennas-LEOs.pdf
A duplexer is built as part of the antenna combination, but could be done separately if necessary. Any 50 ohm coax and connectors could be used. This one does feature inductors wound on a pencil.
73 - Keith, W5IU
A closer look at that document reveals that it was written in September 2006 and towards the end of it mention is made of the possibility of a second article about tweaking the standard Arrow for more gain - does anyone know if that article has been written/published or, for that matter, does anyone have any links to sites that describe Arrow modifications?
Thanks
David KG4ZLB
Pughkeithd@cs.com wrote:
In a message dated 9/22/2008 10:41:01 AM Central Daylight Time, satkins@inetdesign.org writes:
Stephen,
Check this out: http://www.wa5vjb.com/references/Cheap%20Antennas-LEOs.pdf
A duplexer is built as part of the antenna combination, but could be done separately if necessary. Any 50 ohm coax and connectors could be used. This one does feature inductors wound on a pencil.
73 - Keith, W5IU
Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
IIRC, Ken Brittain (sp?), father of the "Cheap Yagi", had a mention of this in his CQ VHF column. It was noted that the original design of the Arrow apparently used a formula for insulated elements on the UHF side. This resulted in the elements being about 1/2" too short. I don't have that issue of CQ VHF with me, but it was published about 2 years ago. Jim KQ6EA
--- On Mon, 9/22/08, David - KG4ZLB/MØZLB m0zlb@btinternet.com wrote:
From: David - KG4ZLB/MØZLB m0zlb@btinternet.com Subject: [amsat-bb] Re: Duplexer for Sats To: amsat-bb@amsat.org Date: Monday, September 22, 2008, 9:31 AM A closer look at that document reveals that it was written in September 2006 and towards the end of it mention is made of the possibility of a second article about tweaking the standard Arrow for more gain - does anyone know if that article has been written/published or, for that matter, does anyone have any links to sites that describe Arrow modifications?
Thanks
David KG4ZLB
Pughkeithd@cs.com wrote:
In a message dated 9/22/2008 10:41:01 AM Central
Daylight Time,
satkins@inetdesign.org writes:
Stephen,
Check this out:
http://www.wa5vjb.com/references/Cheap%20Antennas-LEOs.pdf
A duplexer is built as part of the antenna
combination, but could be done
separately if necessary. Any 50 ohm coax and
connectors could be used. This one
does feature inductors wound on a pencil.
73 - Keith, W5IU
Sent via AMSAT-BB@amsat.org. Opinions expressed are
those of the author.
Not an AMSAT-NA member? Join now to support the
amateur satellite program!
Subscription settings:
http://amsat.org/mailman/listinfo/amsat-bb
--
*David*
*KG4ZLB/MØZLB*
*www.kg4zlb.com http://www.kg4zlb.com/*
*www.mØzlb.com http://www.m0zlb.com/*
Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
participants (3)
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David - KG4ZLB/MØZLB -
Jim Jerzycke -
Pughkeithd＠cs.com