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Newbie needs help
- Thread starter jbo
- Start date
Yeah you will need and swr meter. If the radio had one built in you could use it. Also what antenna are you going to use?
swr
switch it to cal funcion with radio on ch 20
key the mic and turn the cal knob till the needle on the meter goes to were it say cal on the meter
turn it to swr then key the mic . you should try to get your swr low as possible. start with the whip on the wilson as low as it will go in the magmount and move it up a bit if it goes down after u recheck your swr like it first didn as i describes move it up some more. if u move the whip and they seem to get higheru might have to cut some off the whip . cut a 1/4 inch off at a time. your wilson should give i directions on how to tune your antenna
switch it to cal funcion with radio on ch 20
key the mic and turn the cal knob till the needle on the meter goes to were it say cal on the meter
turn it to swr then key the mic . you should try to get your swr low as possible. start with the whip on the wilson as low as it will go in the magmount and move it up a bit if it goes down after u recheck your swr like it first didn as i describes move it up some more. if u move the whip and they seem to get higheru might have to cut some off the whip . cut a 1/4 inch off at a time. your wilson should give i directions on how to tune your antenna
SWR testing instructions for PC78 (and most other radio with built-in SWR meter w/calibration knob.
1. Place meter switch in CAL position.
2. Key mic, hold it keyed, without modulating
3. While keyed, use CAL knob to position needle of meter over calibration arrow, located near upper-right corner of meter. For easier location of mark, look at top red line, and towards the right end of teh red line, you'll see the arror just above.
4. Release mic key, and set meter switch to SWR.
5. Key mic again, take reading from top meter scale. needle not moving = 1 to 1 match, needle at the W in SWR is about 1.5, etc
6. switch channel to next one to be tested, and repeat 1 through 5
Note: Those meters are notoriously inaccurate, especially at higher SWR's. If you see an SWR reading of 2 or more, assume its well over 3. if the needle remains at the S in SWR or below, you're generally safe.
If the SWR on 1 is higher than on 40, you need to lengthen your antenna. If 40 is high, shorten.
1. Place meter switch in CAL position.
2. Key mic, hold it keyed, without modulating
3. While keyed, use CAL knob to position needle of meter over calibration arrow, located near upper-right corner of meter. For easier location of mark, look at top red line, and towards the right end of teh red line, you'll see the arror just above.
4. Release mic key, and set meter switch to SWR.
5. Key mic again, take reading from top meter scale. needle not moving = 1 to 1 match, needle at the W in SWR is about 1.5, etc
6. switch channel to next one to be tested, and repeat 1 through 5
Note: Those meters are notoriously inaccurate, especially at higher SWR's. If you see an SWR reading of 2 or more, assume its well over 3. if the needle remains at the S in SWR or below, you're generally safe.
If the SWR on 1 is higher than on 40, you need to lengthen your antenna. If 40 is high, shorten.
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