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Author Topic: COMING SOON: simple project  (Read 3510 times)
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chucky
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« on: July 18, 2009, 02:02:23 AM »

 director glasses11 Want to get into repeaters better with your Hand Held? If you have a handheld that has a detachable antenna, you're in business with a portable compact GAIN antenna with directional properties that you can build with simple materials. Having an antenna with Gain is like increasing your TX power......... NO bs this works, I made one  :icon_geek:
 
Details to follow

[ Note to Admin munky2 please can you make a "technical" page to move this to? glasses9 ]
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King_DaVo
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« Reply #1 on: July 18, 2009, 05:00:50 AM »

Shit yeah,   Also known as ERP (Effective Radiated Power) . e.g Formula for my base setup. Say 10-15watts from my radio into my yagi array of 18-20dBi gain = Actual tx Power multiplied and coming out of the yagi = Aprox 1,000 watts ERP.   Killing my brain cells  read2

(This is approx figures not actual worked out exact figures).    laughing4

 wav
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GoldCoastCB.com/forum/
Reply #1 on: July 18, 2009, 05:00:50 AM

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cOOter
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!!! disco chicken !!!


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« Reply #2 on: July 18, 2009, 12:57:19 PM »

[ Note to Admin munky2 please can you make a "technical" page to move this to? glasses9 ]

admin_monkey is hung over on banana jiuce. He said ouuuoo, ouuu, ouuuu. which is monkey for okie dokie.  coffee2
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admin
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« Reply #3 on: July 20, 2009, 04:16:09 PM »

Upload area for Chucky's Project pics...
http://www.goldcoastcb.com/forum/index.php?action=gallery;cat=6

I'm not sure how you want to do this, so start by uploading pics there to get started

Upload area for others..
http://www.goldcoastcb.com/forum/index.php?action=gallery

 munky2
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GoldCoastCB.com/forum/
Reply #3 on: July 20, 2009, 04:16:09 PM

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chucky504
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« Reply #4 on: July 23, 2009, 12:39:20 AM »

Sorry for the delay in the project page. I will work on it this weekend.  book1
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King_DaVo
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« Reply #5 on: July 25, 2009, 04:58:00 AM »

Comon, hurry up  :blob7:

 wav

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GoldCoastCB.com/forum/
Reply #5 on: July 25, 2009, 04:58:00 AM

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cOOter
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!!! disco chicken !!!


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« Reply #6 on: July 26, 2009, 04:29:02 PM »

 director Keep ya socks on   icon_king DaVo, Chucky is coming over Monday ta get it all done.
Comon, hurry up  :blob7:

 wav


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chucky504
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« Reply #7 on: July 28, 2009, 08:32:40 AM »

Ok Ok its done. Thanks for the help admin monkey. Chill DaVo hal
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chucky
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« Reply #8 on: November 24, 2009, 06:01:13 PM »

EMERGENCY ANTENNA from coax. This is for 2 metres, but the formula is the same, just put in 477 mhz instead. This gives you a vertical 1/2 wave dipole. Another good project to improve a handhelds' performance

http://www.hamuniverse.com/vertbazooka.html
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chucky
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« Reply #9 on: November 27, 2009, 09:33:46 PM »

Experience has shown that you need to start 'long' with the radiating element. using a swr meter trim for lowest swr. A piece of aluminium or copper tubing can be substituted for folding the braid back over itself. To do this just trim off most of the braid and attach a tail of twisted braid to the tubing like a Neighbour sleve balun. book1
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cOOter
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!!! disco chicken !!!


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« Reply #10 on: December 09, 2009, 11:46:02 AM »

Experience has shown that you need to start 'long' with the radiating element. using a swr meter trim for lowest swr. A piece of aluminium or copper tubing can be substituted for folding the braid back over itself. To do this just trim off most of the braid and attach a tail of twisted braid to the tubing like a Neighbour sleve balun. book1

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