ON THE BLUDGE
Submitted: Saturday, Apr 23, 2005 at 17:20
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KiwiAngler
I was recently given an old 26mgHz AM CB radio with everything except the 26mg whip aerial to screw onto the antenna base.
Before you all bombard me with the pros and cons of HF vs UHF vs AM vs etc.
I just want to fire it up and talk to a mate of
mine who also has a similar rig just for the nostalga
Been to all the 'usual' outlets to see if I could buy one but of course these are almost termed as 'historical items' now :-)
I live in the
Castle Hill area of
Sydney and if someone had one they didnt want I would appreciate it
Reply By: BushBugga (SA) - Saturday, Apr 30, 2005 at 09:15
Saturday, Apr 30, 2005 at 09:15
Mad Dog is on the money here! And the process of tuning the antenna is quite simple.
1. Get a 27Mhz CB antenna (Best if you use one with an adjustable tip)
2. You will need a SWR meter (Sanding Wave Ratio) Aussie one will do.
3. Some wire that is the same diameter as
the tip of the antenna. If you manage to get the adjustable tipped one then try the good old coat hangar and cut out the longest straight part accross the bottom. It will need to be twice as long as the original tip.
4. Install the antenna in the position you intend to operate and ensure you have agood earth at the base of it.
5. Connect the SWR Meter between the transmitter (Radio) amnd the antenna (with the new tip installed about 1/2 way) and tune the radio to the centre channel. eg if the radio has 40 channels then use channel 20.
6. transmitt and
check swr. if the ratio is above 2to1 the tri
the tip no more than 10mm and retest untill the ratio is less than 2to1.
7. Continue testing as before except now adjust
the tip depth untill you find the lowest SWR and youre done!
An important note is that it is technically illegal to operate/transmit your radio here in OZ as it operates outside the Australian Citizens Band alocation. Sorry had to be said.
AnswerID:
108899