Question about Uniden PC78ELITE 40-Channels Base CB Radio

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Swr to low?

Hi i have a trc 48 std 5 watts on a clr 2--.5/8 wave..my swr is low.its lower than 1.5 .is this bad..... i can get out a good 30 to 40 miles with it... and also i can here short wave radio not all the time but it fads in and out just in the day time. ...help

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The lower the SWR the better!

SWR is actually a ratio, e.g. 5:1, but generally speaking only the first number (5 in this case) is written as the second is always a 1. The lowest SWR you can get is 1 (1:1). So if you've got 1.5, that is very good.

Hope this helps,

Matt

Posted on Mar 03, 2008

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1 Answer

I have a Realistic TRC-457.It has very low power and modulation.It is a virgin radio other than someone has replaced the final and driver.I noticet that I cant set the modulation and swr levels on my dosy...


How many watts does it do? If it swings say: 1.5 watts up to 4 watts, someone has installed a swing kit which has a very small carrier. In AM, carrier is not important, its modulation and swing that makes it loud. If its low Audio modulation then it may be that final has went bad too.

May 31, 2011 | Radio Shack TRC-503 CB Radio

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Swr meter not moving


follow these steps to adjust the
standing wave ratio(SWR).
1. Turn on the CB.
2. Set S/RF/SWR/CAL to CAL.
3. Key the Mic and rotate SWR CAL so the meter points
to CAL.
4. Unkey Mic.
5. Set S/RF/SWR/CAL to SWR.
6. Key Mic again and note the actual measurement on
the SWR scale. Refer to the following table to interpret
the reading.

1:1 - 1.5 Great
1.5 - 2:1 OK
2:1 - 3:1 Not So Good
Higher than 3.1:1 Terrible

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2 Answers

Tunning the antenna on radio shack cb trc-447


After installing the antenna, follow these steps to adjust the
standing wave ratio(SWR).
1. Turn on the CB.
2. Set S/RF/SWR/CAL to CAL.
3. Key the Mic and rotate SWR CAL so the meter points
to CAL.
4. Unkey Mic.
5. Set S/RF/SWR/CAL to SWR.
6. Key Mic again and note the actual measurement on
the SWR scale. Refer to the following table to interpret
the reading.

1:1 - 1.5 Great
1.5 - 2:1 OK
2:1 - 3:1 Not So Good
Higher than 3.1:1 Terrible

The ideal standing wave ratio (SWR) is 1:1, or a meter
reading of 1 on the SWR meter's top scale. A SWR ratio
of 1.5:1 to 2:1 is excellent for most mobile CB antenna
applications.

Check the SWR on Channel 1 and Channel 40
If the SWR is higher on 1, make the antenna longer
If the SWR is higher on 40, make the antenna shorter
Most antenna's are adjustable. Make small adjustments at a time.

Oct 10, 2009 | Radio Shack TRC-447 CB Radio

2 Answers

When i key up the mike the tx/rx light and the ant


your swr setting are off wack fix your swr

Oct 02, 2009 | Cobra 29 LTD CB Radio

2 Answers

I need the manual/s for a Cobra CB radio, 29LTD Classic,ser#105129711,manufactured 5/01. Thanks for any help you might have, This radio has a built in SWR meter and I need to know how to tune it or do I...


1) push the button marked S/RF / SWR / CAL to CAL

2) Hold in the button on the mic

3) Turn the SWR CAL knob until the needle is over set to the far right of the meter

4) flick the switch (in step 1) to SWR

Your SWR reading will be displayed. The more to the left the better..

Jun 22, 2009 | Radio Communications

2 Answers

Swr to hi and can t get it down


I hope this will help you on setting your swr put the radio on channel 1 check your swr.
now go to channel 40 check the swr. If the swr is lower on 1 than it is on 40 the antenna must be shortened buy 1/4 inch.until you reach your desired swr.if the swr is lower on 40 than it is on 1 the antenna must be lenthened by 1/4 inch until desired swr.

Mar 28, 2009 | Cobra 29 LTD CB Radio

1 Answer

I want to know about the range with handheld cb radios


It depends on lots of factors....

First, the output power of your radio. Many claim 5watts output, but when measured on an accurate SWR / power meter, they are usually closer to 4 watts. Also, they usually output full power only with external power supply, not internal batteries.

Second, the antenna. If you are using a "rubber duck" helical, range will be at its minimum. If it has a quarter (1/4) wave telescopic whip (about 2 meters!) then that would be better.
If it has a socket for external antennas, then a (1/4) quarter wave car mag mount on something metal and 1/4 wave in radius this would be pretty good, especially if mounted above any local restrictions like buildings and walls.
The ultimate would be a half 1/2 wave antenna, mounted at least 1/2 wave (5 meters!) above ground, on a scaffoling pole or similar at least 1/2 wave long (5 meters).

The station you are speaking to also has a lot to do with range, if they have a good station, then range will be better.

With 5 watts, at the right time of day, with the right antenna, and under the right conditions, CB can reach across the globe! Yes really.

You need to post more info on the type of set up you have.

Hope this helps
M3ODQ

Feb 01, 2009 | Radio Communications

2 Answers

Short wave


hi..yes i here broadcast stations and foreign voices..i know its
shortwave..but it fades in and out.. like skip. ch 8 will have the same broadcast as ch23. or ch3 or ch11.. but like i said it fads in and out..thanks for your help

Mar 04, 2008 | Uniden PC78ELITE 40-Channels Base CB Radio

4 Answers

Cobra 29 ANT light


I believe it to be feedback but be aware of your Standing wave ratio because using a linear amp radiates signal to the point that it could cause that light to come on. There is a problem if the radiated signal is feeding back into the amp a a higher level that it can withstand over time.

Sep 08, 2007 | Cobra 29 LTD CB Radio

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