More than one antenna?

djhubbalubba · Post by **djhubbalubba** » Sun Apr 20, 2008 11:07 pm

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

Post by **pcs** » Mon Apr 21, 2008 4:16 pm

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

Low Power Radio Guy · Post by **Low Power Radio Guy** » Wed Apr 23, 2008 3:38 pm

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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djhubbalubba · Post by **djhubbalubba** » Wed Apr 23, 2008 6:18 pm

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.

Post by **pcs** » Wed Apr 23, 2008 6:57 pm

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.
https://www.pcs-electronics.com/shop/an ... a-systems/

The more the better

djhubbalubba · Post by **djhubbalubba** » Wed Apr 23, 2008 7:54 pm

Okei, thanks for answers

Maybe I can put up my old transmitter another place and let it recive signal from the new transmitter

Post by **pcs** » Wed Apr 23, 2008 8:47 pm

Sure, but it will have to be on another frequency, if the
signals overlap.

djhubbalubba · Post by **djhubbalubba** » Wed Apr 23, 2008 9:23 pm

Yep

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djhubbalubba · Post by **djhubbalubba** » Sun Apr 27, 2008 11:14 am

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

Post by **pcs** » Sun Apr 27, 2008 1:26 pm

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.

djhubbalubba · Post by **djhubbalubba** » Sun Apr 27, 2008 1:59 pm

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

Post by **pcs** » Tue Apr 29, 2008 12:33 am

Tune antenna to 100.8

Depending on the quality of swr meter its reading could be off as well.