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sears roadtalker 40 am ssb usb

Discussion in 'CB Radio Modifications' started by whistler, Jul 27, 2010.

  1. whistler

    whistler Member

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    I picked up a Sears "Road Talker 40" at a yard sale for $15 - it works great!

    Just wanted to know if anyone has a link for the tune up instructions. Can't find it on CB Tricks; so I thought I might pick some brains here.

    I'm new here on this forum.
    My name is Tim and my call is 0773 in San Jose CA.
    Thanks!


     
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  2. Robb

    Robb Yup

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    Hi Tim - welcome to the forum.
    I talk to you all of time around here in San Jose CA!

    Which model of Road Talker?
    A picture would be nice to see - too.
    Maybe someone also has a clarifier mod for this radio as well?
     
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  3. whistler

    whistler Member

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    here is a picture of the radio maybe this will help (y)
     

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  4. loosecannon

    loosecannon break on through

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    look at the metal tag on the back of the radio and post the numbers you see on it.
    LC
     
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  5. whistler

    whistler Member

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    ok i will do that.
     
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  6. whistler

    whistler Member

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    is this it?
     

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  7. Carl

    Carl Technologicaly Challenged

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    model# 934.38270700
    Modulation - Cut D405 or D406
    Am Power - RT602
    SSB Power - RT701

    [​IMG]
    1)Open the radio and you will find a metal case around the pll chip.unsolder this. 2)Cut the trace around pin 9 and 8 . 4)Solder a 4.7k resistor from pin 8 to ground. 5)Install a 6 position/ double pole rotary switch in the radio.then run wires (the red lines) from the switch position's to the locations on the pc board. 6)Solder a 1n914 diode from pin 1 to pin 4 on the switch. 6)Solder a wire from pins 2A to 3A to 4A to 5A.

    Adjust t302, the VCO,so that the radio will TX/RX on all the extra channels. HINT:USE A PLASTIC TUNING TOOL TO MAKE THIS ADJUSTMENT OR YOU WILL BREAK THE COIL!!

    POSITION 1

    Channel 1 to 40 is 26.485 to 26.925

    POSITION 2

    All the regular CB channels

    POSITION 3

    Channel 12 to 27 is 27.425 to 27.595

    POSITION 4

    Channel 1 to 40 is 27.605 to 28.045

    POSITION 5 AND 6 will give regular CB Channels

    CLARIFIER MODIFICATIONS

    1)Find the green wire coming off the FINE TUNING control.Follow the wire to the pc board where it connects and unsolder it.
    2)Find the RED wire behind the meter display and solder it to that location(there is 8VDC there)
    3)Find the BLACK wire from the FINE TUNING control and unsolder it from the PCB.
    4)Solder this wire to PC GROUND .
    5)Find the PURPLE wire from the FINE TUNING control and unsolder that from the PC board.
    6)Solder this wire to the point on the PC board where R303 and the cathode,the end with the band around it! , of D301.

    This mod will give you about 3khz up/down off the "channel".
    If you move the clarifier and the radio "drops out" you will need to JUMP d301 and put the purple wire back to where it was.

     
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  8. whistler

    whistler Member

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    thank you carl
     
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  9. Carl

    Carl Technologicaly Challenged

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    welcome
     
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  10. skybolt58

    skybolt58 Active Member

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    I see this is OLD, But does any one have info on how to adjust the s/rf meter? On this exact same radio?
     
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  11. Double R

    Double R Member

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    i have this radio it look great with a blue swr meter in it , great talking base radio
     
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  12. ddbddg1

    ddbddg1 Senior Member

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    I have the same radio too...sadly it needs some parts right now but it was one of the best talking radios i ever had...i am looking for a parts donor for it... you really got a good deal on that im here to tell you....they sell them on fleabay all day for 70.00 to 125.00
     
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