PCS Electronics PCS Electronics - home page PCS Electronics  
RegisterSearchFAQAM & FM Radio transmitters shop UsergroupsLog in
Need Help With A Comet Antenna

 
Reply to topic    PCS-Electronics Forum Index » Antennas View previous topic
View next topic
Need Help With A Comet Antenna
Author Message
Polo_Thug
Regular poster
Regular poster


Joined: 21 Nov 2004
Posts: 24

Post Need Help With A Comet Antenna Reply with quote
--------------------------------------------------------------------------------

Followed the advise of some fellow members here on PCS.. While tuning my antenna I run into a few problems....

(1) When I tuning it using the SWR meter I'll get 1.5:1 when touching the antenna, but when i let it go it goes to around 2:1. But its around the lentgh accord to the instruction manual. I drove around and town my reception sucks. And the power output level is around 40 watts.

(2) When tuning the antenna just relying on the SWR meter the best I can acheive is a 2:1 ratio but my reception is better than the above mention situation but with less static. But I get this 2:1 ratio without me touching the antenna .And my power out but is around 55 watts. But the lenght is way off according to the instruction chart.

Now my question is why does it give me a 1.5;1 ratio when touching it and when I let go, it goes back to the SET mark .
Fri Apr 08, 2005 2:07 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
Impedance of the antenna changes when you touch it.

Read the other post about SWR meters for "putting out this and
that much power".

_________________
Best regards,
Marko - PCS Electronics
--------------------------------------------------------
Turn your PC into a FM radio station!
http://www.pcs-electronics.com
fax +386 4 2316 128
Fri Apr 08, 2005 2:40 pm View user's profile Send private message Visit poster's website
Polo_Thug
Regular poster
Regular poster


Joined: 21 Nov 2004
Posts: 24

Post Thank Ya Reply with quote
Thank Ya, Just tryin to figure out my I cant get it better than 2:1
Fri Apr 08, 2005 8:21 pm View user's profile Send private message
Sir Nigel
Moderator
Moderator


Joined: 28 Nov 2003
Posts: 334
Location: us.gif
us.gif

Post Reply with quote
I get 1.3 according to my meter. Of course I use really low loss cable.

However the chart is very off, I know most are intended to give you a general idea of what range to tune it, but they should really redo their chart.

_________________
-empty-
Fri Apr 08, 2005 11:49 pm View user's profile Send private message Visit poster's website
pcs
Site master
Site master


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

Post Reply with quote
It depends a lot where you mount it so its easy for the chart
to be off.

Anyway, if you have SWR meter you don't need a chart, just
move it until its minimal.

_________________
Best regards,
Marko - PCS Electronics
--------------------------------------------------------
Turn your PC into a FM radio station!
http://www.pcs-electronics.com
fax +386 4 2316 128
Sat Apr 09, 2005 12:15 pm View user's profile Send private message Visit poster's website
Display posts from previous:    
Reply to topic    PCS-Electronics Forum Index » Antennas 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