Comments on: Trap Dipole http://k5dkz.com/blog/2006/10/16/trap-dipole/ Ham radio projects and a log of interesting experiences Mon, 13 Oct 2008 14:03:47 +0000 http://wordpress.org/?v=2.5.1 By: admin http://k5dkz.com/blog/2006/10/16/trap-dipole/#comment-1952 admin Wed, 18 Apr 2007 22:33:07 +0000 http://k5dkz.com/blog/2006/10/16/trap-dipole/#comment-1952 Check the frequency of the trap before you install it in the antenna. Couple very loosely to the trap as it lays on the bench. Use a frequency counter and/or receiver to verify the frequency. You may not need any more than just the two 40 meter traps to cover all bands. Install the 40 meter traps, put up the antenna and see if it works well enough on all bands. Mine did. I am currently not using traps. After discovering that I could use the antenna tuner with 300 ohm twin lead I decided to go back to the non-resonant dipole. That way I can operate on any frequency and I get very good harmonic attenuation. Not that I need very good harmonic attenuation with todays equipment but I do some homebrewing and I would hate to get caught with an objectionable second harmonic. The trap dipole would be just as happy operating on 40 at the same time it is operating on 80. Check the frequency of the trap before you install it in the antenna. Couple very loosely to the trap as it lays on the bench. Use a frequency counter and/or receiver to verify the frequency.

You may not need any more than just the two 40 meter traps to cover all bands. Install the 40 meter traps, put up the antenna and see if it works well enough on all bands. Mine did.

I am currently not using traps. After discovering that I could use the antenna tuner with 300 ohm twin lead I decided to go back to the non-resonant dipole. That way I can operate on any frequency and I get very good harmonic attenuation. Not that I need very good harmonic attenuation with todays equipment but I do some homebrewing and I would hate to get caught with an objectionable second harmonic.

The trap dipole would be just as happy operating on 40 at the same time it is operating on 80.

]]> By: Ken Arnold G0CAY http://k5dkz.com/blog/2006/10/16/trap-dipole/#comment-1951 Ken Arnold G0CAY Wed, 18 Apr 2007 22:12:54 +0000 http://k5dkz.com/blog/2006/10/16/trap-dipole/#comment-1951 Hi i was reading your article on your 40 meter traps,i have been out of radio for quite a few years and have decided to get back into it,i am in the middle of building a multi trapped dipole from 80m thro 10m,i have wound 2 traps at the moment for 7.1mhz,but to be honest i don't really know how to use this GDO (a bit thick!!!) would i build the trap and solder it up and then insert the coild of my gdo?or wind the trap and measure before soldering?I have the Tech TE 15 GDO which i bought at a rally,your thoughts would be appreciated Thanks and great reading Regards Ken G0CAY Cornwall UK Hi i was reading your article on your 40 meter traps,i have been out of radio for quite a few years and have decided to get back into it,i am in the middle of building a multi trapped dipole from 80m thro 10m,i have wound 2 traps at the moment for 7.1mhz,but to be honest i don’t really know how to use this GDO (a bit thick!!!) would i build the trap and solder it up and then insert the coild of my gdo?or wind the trap and measure before soldering?I have the Tech TE 15 GDO which i bought at a rally,your thoughts would be appreciated
Thanks and great reading
Regards Ken G0CAY Cornwall UK

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