20 Most Recent Ranger Communications RCI-6900F-25 CB Radio Questions & Answers

its the round dime sized battery on the back of the cpu inside (back of faceplate) there is an battery upgrade. www.cbtricks.com

look under the radiator and you should see a petcot valve, wing nut . turn it till you see your old antifreeze coming out then once it stops tighten the nut and fill the radiator .

all you people that have no right to use ham radios should get your license so you don't have to ask dum ash questions like this.

have you tried it on all bands? still won't transmit?take it to a tech so they can fix it properly.

do you have a ham license? when you purchase it they sometimes ask for proof .

hmmm my money is on a cold or several cold solder points,, start checking the legs on the PLL first...

you have hooked it up backwards. You blew the polarity protection diode. It needs to be replaced.

Since the RCI 6900 is a 10 meter ham radio, and not desogned for the 11 meter band, when you had it modified, you also expanded the PLL chip past it's normal use. 10 Meter radios are not designed for CB use ( and of course this is also illegal ) so the PLL does drift. There is no real fix on this problem. Sorry
Ed
NC Electronic
Mills, Wyoming

The first thing to check in this is the mic. If the mic is fine, then the next thing would be to check the final transistor. If it blows, then you will not transmit.

to slide between channels. or to tune the RX

replace memory battery its a CR2032 battery Radio Shack and Walmart has them from $3.65 to $5 in price.

it could be several things......the rf final,bad mic,cold solder joint on the circuit board just to name a few.my suggestion is to find a good local cb shop,if no local shop find one along the interstate hwy most of the time they are located around or near some of the larger truck stops. tell the tech there what the problem is and go from there. good luck !!

could be a number of different problems causing this. I would start with your microphone make sure it is working. it is responsible for transmit & recieve. next check to see if the memory battery is dead this will also cause this problem. next check the regulators in the radio to see if they are supplying voltage.next check voltages in different parts of radio to see if all stages are recieving power follow these steps and something will show up also check your switching diodes to see if they are bad the diodes responsible for x-mit & r-mit of transceiver.

When you say it starts but doesn't stay running does that mean it goes right back off or does it go off random. If it goes right back off it could be several different things such as bad soldier or voltage regulator. If it does it at random I'd say first thing look for bad soldier around regulator its on the side of the radio 3 legs attached to side. One of these legs will get unattached because of using your side screws and tighting them to tight.

Cant recommend you doing that or letting a common cb shop in it. That thing is a monster a beautiful monster send it back to a RCI authorized shop and protect the warranty they will tweak it to its max with out compromising the durability. Before you do send this unit off i stongly suggest a 100 amp power supply it may be overkill but you might notice a different on a watt-meter Sorry if this was of little help it might relieve you of a lot of hassle and depression later...... good luck

i have the same radio rci 2950. Ive had the same problem with mine,turns out with mine the processor would lock up,turning the radio off & on repeadly would clear the problem and the radio would work fine x-mit & recieve. the solution to fixing the problem is to replace the memory backup battery this battery works similar to a computer motherboard cmos battery when this battery goes dead all sorts of strange things happen to the radio wont transmit wont recieve or like your problem transmits continiously. the problem with replacing this battery is finding out what year & model your ranger 2950 is. the internet says only first generation ranger 2950s use the battery second genration & third generation do not use the battery. but the internet could be wrong. so i suggest getting a hold of (usa ranger.com) & give them a phone call or email and ask them about the year your radio was made. they may even service it for you or if you are electronic savvy you can do it yourself. the battery is located close to the main cpu on the front panel if yours uses a battery.

Since you have not ask any specific question i will answer with a url address.

http://www.cbtricks.com/radios/rci/rci_6300_f25/index.htm
Maybe this will be of help and please return with more questions and i am sure someone will be glad to help.

If it was working fine before storage it is most likely electrolytic capacitors. These "can" looking things that are all over the circuit board. These little cans are filled with electrolyte like a battery. If this leaks out or evaporated as they are known to do they will render useless or degrade circuit voltage and current in circuit.

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