TS-590 modifications

Discussion in 'Discussions, Opinions & Editorials' started by HK2LS, Nov 7, 2010.

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  1. HK2LS

    HK2LS Subscriber QRZ Page

    I am sitting here with my new TS-590 - just dying to fire her up - but I can't until I get home to Colombia at that is where the power supply, antenna, etc. all is. Tomorrow I will be taking her with me home and I was looking at the radio and there is a note on the bottom about it being illegal in the US to modify this radio to receive cellular - however, since I live in Medellin, I was wondering if anyone is aware of a modification to convert this radio so that it can receive all frequencies?
  2. N0SYA

    N0SYA Ham Member QRZ Page

    While there is likely a mod to enable rx on the verboten freqs, all you would hear there in the cell phone band is digital noise. Even in Columbia. I consider such a mod a small victory against "the man", but useless otherwise.
  3. W0LPQ

    W0LPQ Ham Member QRZ Page

    4YZF, have you looked at the spec's for the radio??? If not, you need to. The radio does NOT receive or even come close to the cell frequencies. It is only 50-54Mhz for 6M ... nothing higher. Other than that it is a basic 160-6M rig, same as the good old TS-570SG.

    NO CELL...!
  4. KA4DPO

    KA4DPO Ham Member QRZ Page

    The TS-590 only covers .3 to 30 MHZ and 50 to 54 MHZ so my guess is no. There is nothing preventing you from building a converter for 800 MHZ but keep in mind that most cellular transmissions are digital spread spectrum. Unless you know the PN sequence and timing I doubt if you could demodulate them.
  5. KA5ROW

    KA5ROW Ham Member QRZ Page

    I can't believe you are going to ruin a brand new radio for some sort of a mod on any kind. My Pro III has no mods of any kind, and it is going to stay that way.
  6. VE5KC

    VE5KC Ham Member QRZ Page

    It's commonly refered to as the "Mars Mod" and already available on the net. It's involves removing one resister (chip). In the Yahoo Kenwood TS-590S group, there is a picture in the file section. http://groups.yahoo.com/group/KenwoodTS-590

    Glad I live where these silly rules do not apply.. No note on the bottom of my new TS-590S about it being illegal to modify the radio to receive cellular. In Canada they know it isn't capable of receiving in those ranges.. hi..

    Anyway, it's not illegal to modify our radios. Actually we get the US models. The newer ones have the 60 meter channels and Alaska emergency freq. but we can't use them.. We would only get into trouble if we operated on an unauthorized frequency, unless it was in a true emergency situation.

    73 - Ken - VE5KC
    - http://amateur-radio.ca
    - http://ham-radio.ca
  7. N0AZZ

    N0AZZ Ham Member QRZ Page

    I would not buy a radio that had a MARS mod other than a software one. Why do people ruin new radios is beyond me :confused:
  8. WA6MHZ

    WA6MHZ Premium Subscriber QRZ Page

    When I modify a radio (usually just removing a SMT Resistor), I remove it carefully so it isn't damaged and the pads are not damaged. Sometimes the best way to do that is use 2 soldering irons at once, and lift the resistor off the pads. Once removed, I TAPE it to the inside of the cabinet so it can be reinstalled if the radio has to go back to the factory for some reason. MFR's usually claim that such mods void the warranty.

    Also check out MODS.DK for any further info needed on that, or any other radio.

    Mods should be done ONLY by experienced, qualified people who KNOW what they are doing. If you don't know which end of the soldering iron gets hot, you are NOT QUALIFIED! Unqualified hams can do more DAMAGE than help to a radio, new or not.
  9. HK2LS

    HK2LS Subscriber QRZ Page

    The MARs mod enables continous transmit I would assume? 60 meters is indeed allowed in Colombia for Hams - Yes, I am aware that the specs don't cover 800 however there still is this sticker on the bottom of the radio so I was wondering..
  10. AF6LJ

    AF6LJ Premium Subscriber QRZ Page

    I would carry what Pat said one step further.
    Don't do the modifications (any modifications)
    1. you have a legitimate reason for doing the modification.
    2. You understand the circuit, or circuits you are modifying.
    3. You have a plan B if something should go wrong.
    4. know the mod you are preforming won't cause interference to other services.
    5. you have the required skills and tools necessary to properly execute the modification.

    If you can fulfill these five requirements you won't be here asking about modifications.
    If not then Please find someone qualified to do the modifications for you.
  11. N0NB

    N0NB Subscriber QRZ Page

    But. But. But. I wanna talk on them there extree channels!

    Or, I might be in an emergency and the only people I'll be able to call will be outside the ham bands...


    Why is it so hard to leave the radio alone? Unless the mod actually improves the performance, such as improves selectivity, or corrects an issue, such as cleaning up transmit artifacts such as key clicks, is it really worth it? Performing the "MARS" for no other reason than you can proves nothing and may open a person of for liability for out of band transmit. Wouldn't it be better to be able to prove early on that your station could not transmit "there" if confronted by neighbors or local constabulary?
  12. N8YX

    N8YX Ham Member QRZ Page

    That being the case, I would look around for a Harris RT-350K, Sunair 900, one of the Sailor RX/TX/TRX combos...even an Icom marine or fixed-station HF SSB set. Any can be had for less than the cost of (for example) the '590; you can keep them in standby mode until needed...and not risk damaging that new amateur rig.

    Of course, most of these commercial rigs only transmit USB but given the fact that's "convention" on HF it shouldn't be a problem.
  13. AG3Y

    AG3Y Ham Member QRZ Page

    Carry it one step further, Pat, and "tombstone" the resistor, by setting it up on one of the pads. That way, if you ever want to reverse the mod, it is a simple job to heat the pad, lay the resistor back down in place, and solder both sides. Used to do that all the time when testing !
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