PCS Electronics PCS Electronics - home page PCS Electronics  
RegisterSearchFAQAM & FM Radio transmitters shop UsergroupsLog in
More than one antenna?

 
Reply to topic    PCS-Electronics Forum Index » Users share experience... View previous topic
View next topic
More than one antenna?
Author Message
djhubbalubba
Compulsive poster:)
Compulsive poster:)


Joined: 29 May 2007
Posts: 77
Location: In Studio

Post More than one antenna? Reply with quote
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
Sun Apr 20, 2008 11:07 pm View user's profile Send private message
pcs
Site master
Site master


Joined: 18 Jan 2002
Posts: 3063
Location: Radio Land

Post Reply with quote
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

_________________
Best regards,
Marko - PCS Electronics
--------------------------------------------------------
Turn your PC into a FM radio station!
http://www.pcs-electronics.com
fax +386 4 2316 128
Mon Apr 21, 2008 4:16 pm View user's profile Send private message Visit poster's website
Low Power Radio Guy
New registered user
New registered user


Joined: 23 Feb 2008
Posts: 4
Location: 4th corner of the USA
us.gif

Post Reply with quote
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:

\
Wed Apr 23, 2008 3:38 pm View user's profile Send private message Visit poster's website
djhubbalubba
Compulsive poster:)
Compulsive poster:)


Joined: 29 May 2007
Posts: 77
Location: In Studio

Post Reply with quote
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.
Wed Apr 23, 2008 6:18 pm View user's profile Send private message
pcs
Site master
Site master


Joined: 18 Jan 2002
Posts: 3063
Location: Radio Land

Post Reply with quote
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
Wed Apr 23, 2008 6:57 pm View user's profile Send private message Visit poster's website
djhubbalubba
Compulsive poster:)
Compulsive poster:)


Joined: 29 May 2007
Posts: 77
Location: In Studio

Post Reply with quote
Okei, thanks for answers

Maybe I can put up my old transmitter another place and let it recive signal from the new transmitter
Wed Apr 23, 2008 7:54 pm View user's profile Send private message
pcs
Site master
Site master


Joined: 18 Jan 2002
Posts: 3063
Location: Radio Land

Post Reply with quote
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
Wed Apr 23, 2008 8:47 pm View user's profile Send private message Visit poster's website
djhubbalubba
Compulsive poster:)
Compulsive poster:)


Joined: 29 May 2007
Posts: 77
Location: In Studio

Post Reply with quote
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
Wed Apr 23, 2008 9:23 pm View user's profile Send private message
djhubbalubba
Compulsive poster:)
Compulsive poster:)


Joined: 29 May 2007
Posts: 77
Location: In Studio

Post Reply with quote
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


Sun Apr 27, 2008 11:14 am View user's profile Send private message
pcs
Site master
Site master


Joined: 18 Jan 2002
Posts: 3063
Location: Radio Land

Post Reply with quote
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
Sun Apr 27, 2008 1:26 pm View user's profile Send private message Visit poster's website
djhubbalubba
Compulsive poster:)
Compulsive poster:)


Joined: 29 May 2007
Posts: 77
Location: In Studio

Post Reply with quote
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
Sun Apr 27, 2008 1:59 pm View user's profile Send private message
pcs
Site master
Site master


Joined: 18 Jan 2002
Posts: 3063
Location: Radio Land

Post Reply with quote
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
Tue Apr 29, 2008 12:33 am View user's profile Send private message Visit poster's website
Display posts from previous:    
Reply to topic    PCS-Electronics Forum Index » Users share experience... All times are GMT + 1 Hour
Page 1 of 1

 
Jump to: 
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum


Powered by phpBB © 2001, 2005 phpBB Group