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Recieve ok..xmit has noise, i cannot b understood. The red tx lit comes on while xmitting in wet weather

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Sounds like theres a cut or loose connection ant antenna system is getting wet. this will cause temporary high swr's till it dries. have the cb shop thats googled in temple tx check it out for you and its a FREE CHECK...

Posted on Aug 19, 2010

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Posted on Jan 02, 2017

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1 Answer

My cobra 25 transmits but doesnt recieve. I changed all finals but it still will not recieve. Any ideas on what i need to do


finals have nothing to do with rcv.
u need to trouble shoot the receiver.
start at the t/r switch and make sure the antenna is connected to the front end of the rcvr when xmit is not active.
if u hear absolutely nothing u may have an audio issue. try a headset and work backwards.

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After Flash Update (v0227) will not xmit proerly


I would flash it back to the older version. Double check you have the correct firmware. This almost sounds like the incorrect version for your radio.

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Low pwr on xmit,weak rec,swr alert lite on xmit swr 1:4-1 on ch 20


you have no power because your radio is not tuned to your antenna.You get a new radio and put junky coax and a decent antenna and you expect it to work right. Get 75 ft of rg-213 and you will see a change.

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1 Answer

Xmit error message


Error in Xmit meaning one of the next options:

• The TI-84 Plus was unable to transmit an item. Check
to see that the cable is firmly connected to both units
and that the receiving unit is in receive mode

• You pressed ON to break during transmission

• You attempted to perform a backup from a TI-82 to a
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• You attempted to transfer data (other than L1 through
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• You attempted to transfer L1 through L6 from a TI-84
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2 Answers

President HR-2510 will not transmit or recieve


Hi Darrel,

Since you didn't say if you have ever used this radio successfully before, I have to assume it is "new to you" and that you have never seen it work or used one like it before. Start with a few basic settings below:

Turn Squelch to minimum.
Set RF Gain (if present) to maximum
Set Mode to AM or FM
Set volume to 1/3 up
Connect to 50 ohm dummy load.

Turn power on. Hopefully you hear static. If not, try SSB or FM. Still nothing? Try connecting to an external speaker.

Chnage back to AM or FM mode. Key mic check & for transmit indicator. If none, change mic or manually short the PTT contacts in the mic or at the radio to see if it can be made to xmit.

If no xmit - insert SWR meter between xmitter and dummy load. Try to xmit on AM or FM again while watching SWR forward power, if none indicated, xmitter is probably defective.

Replacing parts in a xmitter is not recommended. You'll need an FCC license and a fair amount of expensive test equipment to test repairs, set power levels and deviation and perform an alignment to be sure you aren't causing interference on other frequencies and bands.

You'd be better off bringing it to a radio repair shop for repairs and an alignment.

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1 Answer

I can't xmit or receive on CB channels: Wx channels come in OK. I had a bad WalMart Special mobile antenna which shorted out because of corrosion. Now have a Diesel 15 inch mobile with tunable SWR tip....


If try another mic and see if problem is still
there then you have half of the problem,the
TX an RX all go through the mic if mic good
you will have to go inside of the unit.
Good Luck

Sep 10, 2009 | Cobra 18 WX ST 40-Channels Base CB Radio

1 Answer

T5710 Will Not xmit, etc.


I know you say your batteries are good. However, the symptoms you are describing would indicate a bad battery. Just to be sure, you might swap the batteries between the units and see if the problem moves with the battery. If not, you are correct, the batteries are good.
The next issue would be an internal radio issue, such as the unit has gotten wet or moist, and corrosion is beginning to form on the board. OR it is possible you have a hairline crack in the component board and this is causing some of the traces to make a poor connection.
FYI: It is common with these smaller types of radios for people to put them in their back pocket and sit on them. This will many times cause hairline cracks in the component board, or will cause small components to pop off the board.

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5 Answers

President uniden hr 2510 ham radio


I know these are old posted questions but here are some new answers..... Simplest first! Make sure the TX button is not engaged, if it is then the radio will not work correctly.
Second would be a bad final or driver, this is a tough fix as these parts are tough to find, the parts are no longer made. A fix has been devised using MOSFETs but I have little details on this.
Third but not last is to do with age and environment, a glue was used to stabilize parts to the boards, wire and coils typically. This "glue" will break down over time and exposure to moisture and become conductive, shorting out parts and also corrosive, making copper wire and traces come apart.
Lastly, incorrect bracket knobs with screw threads too long can actually "crush" the PC board and break the PC copper traces.
Dropping the radio is not good, cracked boards and broken wires in hidden places.
Repairs can be made on all these but you need a tech that has experience to find these.....

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1 Answer

Xmit error


You must hit the "receive" button on the receiving calculator BEFORE you hit the "send" button on the sending calculator.

Oct 05, 2007 | Texas Instruments TI-83 Plus Calculator

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