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djhubbalubba
Compulsive poster:)
Joined: 29 May 2007
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Location: In Studio |
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 More than one antenna? |
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Hi 
Can I use more than one antenna to my transmitter system (max pro 3 and 40w amp)
Whats best solution to get better range? I use a High-Gain Vertical Half Wave antenna now with this spec:
4.2dB gain over a dipole aerial!
Narrow and Low radiation angle!
SWR better than 1.5:1
Reduces risk of TVI!
4 MHz RF Bandwidth
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| Sun Apr 20, 2008 11:07 pm |
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pcs
Site master
Joined: 18 Jan 2002
Posts: 3075
Location: Radio Land |
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In your case sensible thing to do would be either to mount
antenna higher or use more power (~150W for 2x more range).
The other way would be to use multi-bay antenna but that'd
be quite an investment as you'd need 6-8 to make a big
improvement.
Marko
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Marko - PCS Electronics
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| Mon Apr 21, 2008 4:16 pm |
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Low Power Radio Guy
New registered user
Joined: 23 Feb 2008
Posts: 4
Location: 4th corner of the USA
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Marko is right, and in case you were wondering, I looked this up once and, while it can be done, there's a lot of math
Here's the info:
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| Wed Apr 23, 2008 3:38 pm |
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djhubbalubba
Compulsive poster:)
Joined: 29 May 2007
Posts: 77
Location: In Studio |
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If I change antenna? Can I get more range?
Is a tuned dipole better than vertical half wave antenna?
I have 40 Watt now, and thats max for what I can use.
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| Wed Apr 23, 2008 6:18 pm |
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pcs
Site master
Joined: 18 Jan 2002
Posts: 3075
Location: Radio Land |
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You can't get more omnidirectional range with a single antenna of any kind.
You could get more range by using really lots of dipoles, as I originally
suggested.
These antennas would work better, too:
http://www.pcs-electronics.com/high-gain-professional-panel-antennas-p-1262.html
Of course you need at least 3 of these, better yet 4, to get circular coverage and gain.
_________________
Best regards,
Marko - PCS Electronics
--------------------------------------------------------
Turn your PC into a FM radio station!
http://www.pcs-electronics.com
fax +386 4 2316 128 |
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| Wed Apr 23, 2008 6:57 pm |
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djhubbalubba
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Joined: 29 May 2007
Posts: 77
Location: In Studio |
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Okei, thanks for answers
Maybe I can put up my old transmitter another place and let it recive signal from the new transmitter
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| Wed Apr 23, 2008 7:54 pm |
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pcs
Site master
Joined: 18 Jan 2002
Posts: 3075
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Sure, but it will have to be on another frequency, if the
signals overlap.
_________________
Best regards,
Marko - PCS Electronics
--------------------------------------------------------
Turn your PC into a FM radio station!
http://www.pcs-electronics.com
fax +386 4 2316 128 |
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| Wed Apr 23, 2008 8:47 pm |
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djhubbalubba
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Location: In Studio |
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Yep
And to all readers of the forum; you can tune in RadioLive on internet if you want to listen to us
See my signature
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| Wed Apr 23, 2008 9:23 pm |
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djhubbalubba
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Joined: 29 May 2007
Posts: 77
Location: In Studio |
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I put this here:
I look at my SWR meter today, and I wonder, how many watts output I have? I dont think I can read the swr meter correctly 
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| Sun Apr 27, 2008 11:14 am |
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pcs
Site master
Joined: 18 Jan 2002
Posts: 3075
Location: Radio Land |
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Looks like a cheap CB wattmeter, its hard to say whether reading is correct.
Also, note that with a swr significantly from 1:1 the power reading becomes
less and less accurate.
_________________
Best regards,
Marko - PCS Electronics
--------------------------------------------------------
Turn your PC into a FM radio station!
http://www.pcs-electronics.com
fax +386 4 2316 128 |
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| Sun Apr 27, 2008 1:26 pm |
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djhubbalubba
Compulsive poster:)
Joined: 29 May 2007
Posts: 77
Location: In Studio |
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How can i get lower SWR?
Change frequency?
The antenne is tuned to 100.8MHz but the bandwidth is plus/minus 2 MHz from the centre frequency, and i transmit @ 99.6MHz
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| Sun Apr 27, 2008 1:59 pm |
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pcs
Site master
Joined: 18 Jan 2002
Posts: 3075
Location: Radio Land |
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Tune antenna to 100.8
Depending on the quality of swr meter its reading could be off as well.
_________________
Best regards,
Marko - PCS Electronics
--------------------------------------------------------
Turn your PC into a FM radio station!
http://www.pcs-electronics.com
fax +386 4 2316 128 |
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| Tue Apr 29, 2008 12:33 am |
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