Kenwood TK-690/790 Dual band issue

Discussion in 'Mobile Radio Systems' started by KK6YDB, Oct 10, 2018.

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  1. KK6YDB

    KK6YDB Ham Member QRZ Page

    Hello all, I need help with my dual band Kenwood tk-690/790, I cannot get it to read or write to the radio, I keep having issues with getting it to turn on properly Im at a loss and do not know what to do. I need help please.
     
  2. WB7OXP

    WB7OXP Ham Member Volunteer DX Helper QRZ Page

    does your computer see your cable when you plug it in? if a pc, there should be some "beeping", and activity in the bottom right hand corner of the screen, when you start the software, are you selecting the right "com port"? the computer assigns a "com port" to the cable, are you selecting the correct one in the software? they must match
     
  3. N6FOG

    N6FOG Ham Member QRZ Page

    1: Is there a yellow wire coming from either of the decks or the control head? This might be an "ignition sense" wire that needs to be hooked up to B+ to allow the radio to turn on before you can turn the ignition sense off in the software.
    2: Are you using a USB or Serial cable, and have you selected the correct COM port in the software?
    3: Are you wired directly to the battery, or to a heavy gauge wire that is hooked directly to the battery? This would ensure that you're getting the full voltage to the radio.
     
    WB7OXP likes this.
  4. KK6YDB

    KK6YDB Ham Member QRZ Page

    I am using the kenwood usb cable, it’s not the knockoff brand and I know it works. I took the radios apart and used them as separate radios and they work and read and write fine seperately. It does have a yellow wire attached and I have it fused at 3 amps to an ignition wire. They are not tied to a battery, I drive an old police fleet vehicle and there is a small 6 port fuse block under the dash(3 hot and 3 ignition) I have them wired to this. I have a fuse block setup in the engine area meant for my radio setups but I wanted to plug them in real quick to test them and ran into that problem.
     
  5. W2MRD

    W2MRD XML Subscriber QRZ Page

    I know this is a month old, but if you are still having he problem...
    You said they worked as separate radios. When you put them together as a set, did you do the jumper mods for dual radio?
     
  6. N3RSJ

    N3RSJ Ham Member QRZ Page

    You have 90 series but :
    Old 630,730-830 radios had internal modes to make work remote head or dual band
    (W2MRD above has a point.)
    That info is online somewhere to service/owners manual batlabs-repeater-builder ect.?
    I can only remember getting 30 series radios where I didn't want remote or dual banding.
    I had opened radio soldered the cut jumpers or put back together or if resistor added I deleated it.
    I did this 2-3 times radios put faces on removed remote kit caps , powered em" right back up.

    I have a TK 890 deck in need of face plate and mic items are way to much on Greed-Bay.
    So It sets.

    Radios are Nice.
    73
     

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