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Baofen UV5 RA wont transmit

Will transmit garbled voice in FRS bands but nothing in the 146 mhz or 444 mhz babds despite set up per manual instructions

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  • Master
  • 623 Answers

Baofeng manuals are notoriously hard to read/interpret. Check on Google. Several people have created better instructions.

Posted on Nov 05, 2013

6 Suggested Answers

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Posted on Jan 02, 2017

Benimur
  • 6966 Answers

SOURCE: Yeasu FT 897D

Hi,

I suspect that the extended transmit will really allow you TX on 2 Meter from 136-174 or thereabouts even with modifications.

At any rate, Air Bands are amplitude modulated, have you tried switching mode to "AM" when operating 116-136MHz??

Would you post back please on how the modification (extended transmit) was done; software programming of the EEPROM or jumpers (JP1001-1009).

Good luck and kind regards.

Posted on Nov 23, 2007

sharcnet
  • 2130 Answers

SOURCE: alinco dj-v5 HT deviation adjust

To adjust the deviation of this radio, you don't have to take it apart. If you take the battery pack off, there is a sticker on the back of the radio saying Alinco. Pull that sticker off and underneath are the variable resistors. See the service manual for more details on how to make other adjustments.

First, make sure you note the present position of this pot so you can turn it back if you have to.

If you don't have any equipment to measure deviation, make a contact on the repeater and try turning the pot in small increments and ask the person to help you set the deviation so your voice sounds good through the repeater.

Once set, if the repeater has a touch tone test, go through and make sure all your tones are being properly decoded.

Please let me know if I can be of further assistance to you.

Good luck!

- Jim
KA3EBX
South Hills ARC
www.sharc.net

Posted on Feb 26, 2008

  • 1 Answer

SOURCE: Columbia FRS-S14 two way radios

Are you just looking for a way to program them to the same freqs? But if they are FRS family radio then they should have the same channels in them.

Posted on Nov 05, 2008

  • 320 Answers

SOURCE: Some bands OK some not. No transmit, no readout on some.

its the problem of the frequency range its getting blocked  at particular location.these can be solved by two options 1)first try changing the location of the unit from one corner to another corner.that should help to catch the frequency again if its getting blocked at particular location.this happens many times.but if changing the locan does not make any difference.then  2) get checked that the antenna of the unit is not catching the required frequency for the unit.so change the antenna also connect this external antenna  as mentioned 50 ω (it comes wioth SMA Connector) that helps in catchinf the frequency. you will get this at radio shack website. this will help. ----------------------------- also in the unit there is a component which controls the frequency called microprocessor if that goes weak the unit slowly slowly stops receving the accurate signals and only the noise comes.so the micro processor in located internally in the left side.its a green and black colour mini chip circuit board.many times opening the unit and removing and cleaning the microprocessor and refitting it solves the problem but this is 50 --- 50 chance. this all has to be checked what mentioned. thank you for using fixya.

Posted on Mar 31, 2009

WV6Z
  • 7 Answers

SOURCE: PPT works in the lower bands (under 148 Mhz) but not 156 range

Your radio has not been modified to transmit outside of the amateur bands.

Posted on Jun 26, 2009

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Zartek 705 and 708 2 way radios


The 705 will operate on (8) frequencies in the 446Mhz range and (5) in the 464Mhz range. The 708 operates on 446Mhz. Please note that the links provided mention they operate in "public frequency band" of South Africa. These radios were not intended to be used in other countries. See below for more.

In the U.S.(and many, many other countries), the 420Mhz - 450Mhz frequency range is set aside by the FCC (and other bodies) for licensed operation by amateur radio operators. Portions of the 460Mhz range is set aside by the FCC for use by Public Safety Agencies - mostly local police and fire departments. In the U.S., the Family Radio Service (FRS is 462Mhz) is an unlicensed band and General Mobile Radio Service (GMRS is 467 Mhz) requires a licensed.

As you might have guessed, unlicensed or unauthorized transmissions are ILLEGAL. You may be fined, imprisoned or both if caught by the FCC. If using these radios in a location other than South Africa, consult that county's communication authority BEFORE transmitting. You cannot transmit legally in the U.S. with these radios.

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Baofeng UV5RA WILL NOT TRANSMIT


First, it's illegal to use that radio in the FRS bands. Also many of the Baofeng radios have very "dirty" output (spurs, frequency drift, bad modulation, etc). Your best bet is probably to buy another radio. With these radios about 3 of 10 I've tested have been bad.

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Baofeng UV5 RA WILL NOT TRANSMIT IN 146 MHZ or 440 mhz bands


It's not programmed right. You can probably find more intelligible programming instructions on Google. Their manuals are not great.

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The first radio has the transmit code set improperly.

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How to hack into a motorola mr350r radio and change the frequencies


Hi, Jeremy,

Not Advisable, apart from being illegal, you can cause irripairable damage to your radio.

These radios were designed to operate on specific frequencies only.

My advice....Don't Do It!!!

Hope that answers your query.

Cheers,
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Can two different style motorola 2 way radios be changed to same frequency


Hi Kate,

The short answer to your question is: no, or "not readily". Here's why:

The Motorola 4900 radio operates in the FRS (family radio service) and GMRS (general mobile radio service) in the UHF band. This radio will work with any other FRS / GMRS band radios (no reprogramming of transmit and or receive frequencies is possible for these radios). The trick is that the numbering of the channels may differ from brand to brand ie: Ch1 on your Motorola may not necessarily be Ch1 on a Midland radio or other brand. A complete list of the frequencies and channel assignments for FRS /GMRS can be found on Pg. 17 of the manual. It is important to note that without a valid GMRS license, you are prohibited from transmitting on the GMRS only channels (Ch 15 through Ch 22). The combination GMRS/FRS channels (Ch1 through Ch7) and the FRS only channels (Ch8 through Ch14) are for individuals and family members that do not have valid GMRS licenses. If this is you, you should limit your transmissions to Ch1 through Ch14 only, as FRS does not require a license in the US. Unlicensed use of GMRS only Ch15 through Ch22 can result in fines and imprisonment if caught by the FCC.

Further complicating the issue are the so called "privacy tones". This is simply a very low or "sub-audible" frequency that is sent whenever transmitting. Motorola calls these "Interference Eliminator Codes". When another radio receiver is set to listen for a particular privacy tone, it stays silent until a transmission with the exact same privacy tone is detected. Again, these tones are listed in no particular order, but are generally listed as 1, 2, 3, etc. or a, b, c, etc. instead of the actual frequency in hertz. You can selectively set your radio to transmit & receive one of the 38 codes or, set the code to "0" to communicate with radio that do not offer these privacy codes - or does not use the same frequencies for these codes. You can read more on Motorola's codes on Pg. 19 of the manual.

The Motorola CP200 radio on the other hand is a commercial radio, and requires computer programming with Motorola software. The CP200 is offered as both Low & High sub-banded VHF and Low, Mid & High sub-banded UHF radios. You would need to have a CP200 that is designed to accept the Mid UHF band (438Mhz - 470Mhz) frequencies in order to program the 462Mhz & 467Mhz FRS / GMRS frequencies into it. The final obstacle would be what is called "FCC Type Acceptance". The CP200 is probably NOT Type Accepted for transmitting FRS/GMRS frequencies, and as such the Motorola dealer doing the programing might balk at putting them in. You can read a spec sheet on the CP200 here.

I hope this helps & good luck!

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Can you make a baby monitor out of the Motorola 250 model


hello yes you can use these as baby monitors .set one with vox on turn its volume down completly set the channel you require ,secondly the receiver radio set to same channel and that is it though i should state that these radios transmit on pmr band 446 mhz which is widely in use by many people nationwide so they can also listen in to whats been transmitted from your home not very private im afraid !! I would suggest you purchase a wired system hence more privacy and peace of mind hope this helps you

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1 Answer

Is there a way to change the frequency of a specific channel?


FRS & GMRS frequencies have been preset by the governing bodies where these radios are licensed for use. They consist of Ch 1 - 14 for FRS or Family Radios Service (the new "CB" radio) and Ch 15 - 22 for GMRS or General Mobile radio Service. GMRS frequencies may be repeated 5 Mhz higher - the repeater input of channel 22 (462.750 Mhz) may be heard if close to the transmitter on Ch 22, but if a repeater has been set up to repeat signals in range on Ch 22, they would also be heard on 467.750 Mhz. The repeater will likely have one or more of the following: a high vantage point such as a hill or mountain top, may increased output power of up to 50 watts, or have an antenna with gain properties. Any one or combination of any of these benefits, will result in a significantly increased area of coverage.

FRS Frequencies Channel Frequency in MHz 1 462.5625 2 462.5875 3 462.6125 4 462.6375 5 462.6625 6 462.6875 7 462.7125 8 467.5625 9 467.5875 10 467.6125 11 467.6375 12 467.6625 13 467.6875 14 467.7125 15 462.550 16 462.575 17 462.600 18 462.625 19 462.650 20* 462.675* 21 462.700 22 462.725

It is important to note that only Ch 1 - 14 may be used without a license. Transmitting on any of the GMRS frequencies (Ch 15 - 22) shown in red in the chart above, requires an FCC license if used in the U.S.A. Other countries may or may not have laws for licensing the use of any or all these frequencies, so check before transmitting. Modifying an FRS / GMRS radio is a violation of FCC rules and if caught; can result in fines, prison or both.

If you'd like to be able to tune actual frequencies - and not be limited to specific channels, you ought to look into amateur ("ham") radio. While not in the FRS or GMRS bands, there are literally hundreds of thousands of frequencies to use once licensed. The ARRL (American Radio Relay League) has a great deal of info about ham radio.

I hope this helps & good luck! Please rate my reply - thanks!

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1 Answer

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The FT-1802 is a 50 watt 2 meter FM transceiver. It can transmit anywhere between 144 - 148 Mhz (the FM portion) of the 2 meter ham band. It can receive anywhere between 136 - 174 Mhz without any modifications. There is a modification to enable transmit "out of band" below:

http://www.ham.dmz.ro/yaesu/ft-1802-extended-transmit-modification.php

There are few details about the results of this mod - typically these provide for transmitting on frequencies outside (above, below or both) of the 2 meter ham band. Transmitting outside of the ham band without a proper license for the frequencies in the U.S. is a violation of FCC rules.

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