Question about Ranger Radio Communications

4 Answers

Hi i have a problem with my ranger 2950dx which is when on AM or FM (SSB ok) the radio very quickly get so hot on the side where the audio chip is, think the heat is coming from the voltage reg? that you cannot touch the radio then what happens you get a loud machine gun noise coming from the speaker the only way to stop it is to pull the power then reconnect but soon as you key up or turn the volume up this noise starts again help

Posted by on

  • 7 more comments 
  • kozzae427 Jun 04, 2011

    hi tony
    i use my ranger on the 10mtr FM part of the band where all the 10mtr repeaters are! 29mhz
    we have a major group of hams on this here in Australia and also in the UK when i lived there
    so my radio only gets used on USB/FM nobody uses AM , these are one of the best 10mtr radios around for FM work!!! as i said the heat is coming from the voltage regulator next to the audio chip and i dont have echo i have opened the radio to check for heat the power levels are right 25w ssb 10w fm the rear end of radio dont get hot,hot on any mode
    something is causing the voltage reg to heat up? not sure if it is the audio ic ? i have a new one of those to solder in but not sure till i get some more answers cheers

  • kozzae427 Jun 04, 2011

    Hi tony
    the radio works fine on SSB the problem is only on AM / FM
    so i only get major heat from voltage ic when using AM/FM
    the heat i get from the rear end is normal on both SSB/AM/FM
    the problem aint at that part, its gotta be around the voltage reg / audio ic
    dept!
    so when it heats up real bad this is when i get the machine gun noise blasting thro
    my speaker the only way to stop the noise is to pull the power wait a minute then reconnect
    it will work fine for say the first key then the noise is back or sometimes by turning up the volume control the noise will start only if it has been doing it
    i have seen this problem on a radio 20yrs ago but cant remember what the cause was?
    think it might of just been the audio chip or a cap?
    just dont wanna solder this new audio ic in in case it gets damaged
    not unless im sure this could be the problem?
    have you any idea what voltages i should get on the legs of the audio ic
    i can then test cold then hot? what about a voltage check at the voltage reg?
    what other reason would there be for this part to hot as hell??
    colin

  • kozzae427 Jun 04, 2011

    hi tony
    done that but cant get a reading doing the apc i take it i need to remove the short pcb? i get no reading on tp8 do i have to bridge tp7 & tp9 before i get a reading?
    col

  • kozzae427 Jun 05, 2011

    hi the buzzer aint buzzing. the voltage regular gets hot real hot after keying the radio for more than 30secs on AM or FM once the side of the radio heats up where the audio ic is the radio starts making a very loud motor boating / machine gun noise coming from the speaker which only
    i can hear, if i key up while the noise is happening the person whom i am talking to dont hear it
    it only stop when the radio cools down! so something is causing the voltage reg to heat up to quick or more than it should! SSB on the radio works fine i can talk till the cows come home! no heat??

  • kozzae427 Jun 07, 2011

    hiya
    what cap is it?? thanx

  • kozzae427 Jun 07, 2011

    Ranger 2950dx over heating problem
    on FM tx the voltage regulator 2SB827
    get so hot within 30seconds you cannot touch it!
    its fine on SSB all the levels in the radio are fine ,but after 5minutes of this heat i get an audio problem where this loud motor boating noise
    starts and the noise level is increased or decreased by turning up/down the volume only way to stop the noise is to pull the 12v supply and let it cool down i need a fix before the big hammer comes out!!!!

  • oz1dwx
    oz1dwx Nov 27, 2012

    change C182 to 1uf

  • Sideways sam Feb 18, 2013

    Exactly same problem with mine, anyone found the answer ??

  • Sideways sam Feb 18, 2013

    It's not the caps, or the audio chip, but still testing...

×

Ad

4 Answers

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    President:

    An expert whose answer got voted for 500 times.

  • Master
  • 2,468 Answers

No its the audio chip that has shorted out its mounted on the center middle of the radios circuit board, and the radios side chassis is the heat sink,open it up and when it starts to get hot and motor boat/machine gun,spray it with circuit board chiller(available at any electronics parts dealers)and see if it ceases,also spray any nearby capacitors and the board too as if a cap gets hot in this circuit the thing will either short or go open and chilling these components will heal them till they get hot again,then just replace the suspect component

Posted on Jun 07, 2011

Ad
  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • Master
  • 1,961 Answers

The noise comes from the power supply.It is a static sound that comes from the voltage out put of the transformer...this static is suppose to be filtered by the capacitor..replace this capacitor with the same rating and value riffle DC voltage happens when this capacitor is faulty...good luck

Posted on Jun 05, 2011

Ad
  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • Master
  • 3,018 Answers

  • You run your Ranger on FM? FM use Full Modulation. It puts everything that radio has in the way of power as soon as you key down (No "Swing.") In fact FM on a Ranger is pointless because the frequencies on FM that are available on the Ranger are CW only unless you are using Sideband with FM on say 28.400 USB but you said SB was fine. If you put that radio on FM and key down you are lucky your radio is even working at all and this could be part of your problem.
  • As for this problem on AM, you could have weakened things when keying on FM. You could have fried the Audio Chip. Could have a bad crystal. Could have a shorted transistor.
  • Any mods been done to this radio? Is there an Echo Board inside this radio? Is the radio new? New to you? Have you opened the radio at all? If not, open it and see if the chip itself is getting hot of something else.
Tony

Posted on Jun 04, 2011

  • 1 more comment 
  • Iron
    Iron Jun 04, 2011





    • I'm in America and this site is based in America so unless some indicates being from across the pond I have to assume they are also in America. They are about the best for 10 meter and SB for that matter. Over here people modify them so bad, they turn a perfect radio into trash and they often ruin fast and that was the basis for my original statement.

    • You also stated that SB worked fine in your original statement and that only AM and FM works OK but then in your second statement you say it gets hot in any mode. The difference in those statements can effect my diagnosis. If it gets hot in any mode then the IC chip can absolutely be the offender as well as the voltage regulator for that matter. If it worked as with your original statement OK on SB then I would be less inclined as the IC would effect all modes.

    • I had one do this to me one time and it was the transistor feeding one of the crystals and had to replace the crystal and the transistor.

    • The only way to be positive is to either enlist an Oscillator Scope or replace a parts or two. Start with the voice chip.



    Regards,

    Tony

  • Iron
    Iron Jun 04, 2011

    Or rather the radio messed up on FM and AM and SB was OK.

  • Iron
    Iron Jun 04, 2011





    • Hi Collin, A cap you can test with a multi meter. Unsoldier it and check for polarity. At least enough to see if it is faulty. It's getting hot because something is shorting or surging.

    • PLL 2 VCO Voltage Set radio to 24.890 MHz, AM RX mode. Frequency setting at 29.699 MHz. Connect Multi-meter to TP10. Should read 4.5 VDC


    • PLL 1 VCO Voltage Set radio to 24.890 MHz, AM RX mode. Frequency setting at 32.000 MHz. Connect Multi meter to TP11 and this should read 6.5 VDC.


    • AM APC Set radio to AM TX mode. Connect Multimeter to TP8 VR15 6 VDC

    • SSB APC Set radio to USB TX mode. Connect Multimeter to TP8 VR18 12.5 VDC



    • There are some voltages for you to check.



    • Regards,

    • Tony


×

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • Master
  • 1,833 Answers

Hi,

This problem comes froma faulty CPU or MCU board. You may needto replace it. If the buzzer is constantly making a noisewhen the radio is in AM, FM and CW but will not change frequency when FrequencySelector is moved and the Up Down functions buttons work OK Then the frequencySelector needs to be replaced.

Posted on Jun 04, 2011

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE:

Hi there,
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this issue over the phone in a minute or two.

Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.

Here's a link to this great service

Good luck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

Radio power`s on but no transmit or receive on ssb however it will transmit with full power on fm


If your receiver was operating previously but now the SSB option is not working, very likely the sideband detector has failed. I'm not directly familiar with your Yaesu unit but, in most Yaesu transceivers, the SSB chip and control circuit (including diodes) is identified in print on the main board.

May 16, 2015 | Yaesu FT-990 DC Transceiver

1 Answer

Super2000 i have no audio output on ssb am fm ok ?


problem with the ssb filter if am & fm are ok

Sep 27, 2014 | Radio Communications

1 Answer

How do i adjust the sideband


Instructions

Connect one end of your coaxial cable to the output port on your SSB Transmitter. Connect the other end of the cable to the coaxial input port on your RF demodulator.

Connect one end of your 1/4 inch audio cable to the audio output port on your RF modulator. Connect the other end of the audio cable to the audio input jack on your amplifier.

Turn on your SSB transmitter, RF modulator and amplifier. Adjust your SSB transmitter modulation by adjusting the knob on your RF

Jul 22, 2012 | Ranger RCI-6900F-25 CB Radio

1 Answer

Ihave a gargeled recive sound


Check the position of the mode selector switch. You may be receiving a SSB (single side band) transmission that is not on the exact same frequency as you or, your radio is in AM or FM mode. You will need to select either USB or LSB (upper or lower side band) and vary the clarifier knob until the sound becomes intelligible. If the sound does not become clear, try the other side band and repeat varying the clarifier knob.

Conversely, if you are in USB or LSB mode and there is a transmission on AM or FM, it will have the same garbled sound. Try changing the mode to AM and the FM. If it does not become clear, it is likely a SSB transmission and you are not on the exact same frequency of the transmission you are hearing. Vary the clarifier knob until it becomes clear - or change to the other side band if needed and try the clairfier again.

The short story is that you must be in the same mode and on the same exact frequency. When in AM or FM, this is less of a problem as these are much more wide banded signals than SSB signals.

The 2990 is really a 50 watt 10 meter amateur radio - but is geared to CBer's as it is easily modified to work in the CB frequency range and the so called "free band" between USA's CB (11 meters) and worldwide amateur 10 meter bands. Be careful transmitting this radio on CB frequencies as it violates FCC rules for power output there - and transmitting in the 28MHz - 29.7MHz requires a valid amateur radio license. Fifty watts on ham frequencies is tiny compared to the 1500 watts permitted. Why not get your ham license (here's how) and leave the "Chicken Band" (and all it entails) behind. You won't miss it!

I hope this helps and good luck!

Apr 12, 2012 | Cobra Radio Communications

1 Answer

NO variable power on FM,or SSB, but variable works ok on AM


Look for open resistors near by, if the 2SC1969 shorted it has taken out one or two parts, also check for open foils on the printed circuit, beyond this a circuit diagram is needed.

Mar 23, 2012 | Magnum S9 Base CB Radio

1 Answer

Cannot select USB or SSB.Displays LSB or LISB? Very poor reception


On the Satellit 750 you have a button marked SSB. If you have selected a shortwave band then you can press the SSB button. Pressing the button repeatedly will toggle between LSB and USB.

You will need to know the exact frequency and the broadcast time, and the side band. Turn the radio on. Select a frequency which you know carries SSB signal and wait. Those that broadcast on SSB are not radio stations, maybe ham radio operators.

You can also select a short wave band, press the SSB button once or twice to select the side band and launch the automatic tuning system. It will scan the meter band and stop for a few second when it receives a strong enough signal. If you are able to perceive a clear signal on LSB or USB then you found a broadcaster. Some radios just have SSB and you cannot choose the side.
Personally, when I buy a radio I always insist on SSB but I have never been lucky tuning in an SSB signal. I keep trying once in while.

Jun 23, 2011 | Grundig Satellit 800 AM/FM/SW Radio

2 Answers

How to adjust frequency on transmit??? Galaxy


hELLO THERE
hERE IS SOME MODIFICATIONS FOR THIS RADIO
Galaxy Mods DX 2527 - VR 1....AM/FM S-Meter, VR 2....SSB S-Meter, VR 3....SSB Squelch Range, VR 4....AM/FM Squelch Range, VR 7....SSB Carrier Balance, VR 8....RF Meter, VR11...Driver Bias, VR12...SSB ALC, VR13...Hi Power, VR14...AMC, VR15...AM Low Power, VR16...SSB Low Power, VC 1....10.240, VC 2....10.240. DX 2517- VR 1....AM/FM S-Meter, VR 2....SSB S-Meter, VR 3....SSB Squelch Range, VR 4....AM/FM Squelch Range, VR 5....FM Deviation, VR 6....SSB Carrier Balance, VR 7....TX Offset, VR 8....CW Beep Level, VR 9....RF Meter, VR10...Final Bias, VR11...Final Bias, VR12...Driver Bias, VR13...SSB ALC, VR14...AM/FM High Power, VR15...AM Modulation Meter, VR16...AM Modulation, VR17...SSB Power, VR18...AM/FM Low Power, VR601..13.8 Volt Power Supply. DX 22B- VR 1....AM/FM S-Meter, VR 2....SSB S-Meter, VR 3....SSB Squelch Range, VR 4....AM/FM Squelch Range, VR 7....SSB Carrier Balance, VR 8....RF Meter, VR11...Driver Bias, VR12...SSB ALC, VR13...High Power, VR14...AMC, VR15...AM Low Power, VR16...SSB Low Power, VR21...TX Offset, VC 1....10.240, VC 2....10.240. DX 11B- VR 1....AM/FM S-Meter, VR 2....SSB/CW S-Meter, VR 3....SSB Squelch Range, VR 4....AM/FM Squelch Range, VR 5.....FM Deviation, VR 7....SSB Carrier Balance, VR 8....RF Meter, VR10...Final Bias, VR11...Driver Bias, VR12...SSB ALC, VR13...AM/FM High Power, VR14...AM Modulation, VR16...CW Tone Level, VR20...Final Bias, VR21...TX Offset, VR601..13.8 Volt Power Supply, VR803..AM/FM Low Power. DX 77HML, DX 88HL, and DX 99V- VR 1....AM/FM S-Meter, VR 2....SSB S-Meter, VR 3....SSB Squelch Range, VR 4....AM/FM Squelch Range, VR 5.....FM Deviation, VR 7....SSB Carrier Balance, VR 8....RF Meter, VR10...Final Bias, VR11...Driver Bias, VR12...SSB ALC, VR13...AM/FM High Power, VR14...AM Modulation, VR16...AM/FM Low Power, VR20...Final Bias, VR21...TX Offset.
Unmarked VR in R189..AM/FM Medium Power for DX 77HML only. DX 33HML, DX 44V, DX 55V, DX 66V, and DX 73V- VR 1....AM/FM S-Meter, VR 4....AM/FM Squelch Range, VR 5.....FM Deviation, VR 8....RF Meter, VR12...Low Power AM Modulation, VR13...AM/FM High Power, VR14...High Power AM Modulation, VR16...AM/FM Low Power.
Unmarked VR in R188..AM/FM Medium Power (DX 33HML only)
Unmarked VR in C139..Med Power AM modulation (DX 33HML only) DX 949,DX 959- VR 1....AM S-Meter, VR 2....SSB S-Meter, VR 3....SSB Squelch Range, VR 4....AM Squelch Range, VR 6.....SSB Carrier Balance, VR 7....TX Offset, VR 9....RF Meter, VR10...Final Bias, VR12...Driver Bias, VR13...SSB ALC, VR14...AM High Power, VR15...AM Modulation Meter, VR16...AM Modulation, VR17...SSB Power, VR18...AM Low Power, VC1....10.240. DX 2517 and DX 2527-
Symptom:Buzzing or motorboating sound in either the transmit or receive.
Problem: TR602 is oscillating
Cure: Replace C602 with a .01uF cap {Cap is located in the power supply board}.
RG 66,99,DX2517 Replace Q54 2SB754 60watt 7A with a higher power 2SB817 100 Watt 12A. Derating of this component will cool operation, provide better voltage stability,decrease wobble, allow voltage increase to 14.5 volts comfortably. (replace 10 volt caps in this section of the radio to a minimum of 16 volts before increasing supply voltage to this level)and provide faster swing rise time, Replace Q37 2SA473 to a 2SA1012-0 or ECG153 this will improve the clarity and volume of the modulation and it will also run a lot cooler.

Nov 12, 2009 | Galaxy Radios DX-949 40-Channels Base CB...

1 Answer

Lack of receive on a ranger 2950


Bad mic? dirty mic pins? If the mic is bad, you will have no receive.

Nov 10, 2009 | Ranger RCI-6900F-25 CB Radio

1 Answer

Audio limiter


tintlady, here is the info you requested;
the AM limiter is R 276

These are the variable adjustments inside,and what they control.
VR-1 AM S-METER
VR-2 SSB S-METER
VR-3 SSB SQUELCH RANGE
VR-4 AM SQUELCH RANGE
VR-6 SSB CARRIER BALANCE
VR-7 TX OFFSET
VR-9 RF METER
VR-10 FINAL BIAS
VR-12 DRIVER BIAS
VR-13 SSB ALC
VR-14 AM HIGH POWER
VR-15 AM MODULATION METER
VR-16 AM MODULATION
VR-17 SSB POWER
VR-18 AM LOW POWER
VC1-10.240 MHz Frequency adjustment

Hope this helps you out, let me know,,Mechanic

Jan 20, 2008 | Radio Communications

Not finding what you are looking for?
Radio Communications Logo

Related Topics:

656 people viewed this question

Ask a Question

Usually answered in minutes!

Top Ranger Radio Communications Experts

Steve Allison
Steve Allison

Level 3 Expert

5569 Answers

Mike Charette

Level 3 Expert

1847 Answers

normis101

Level 2 Expert

65 Answers

Are you a Ranger Radio Communication Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...