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Frequent disconnecting HRD radio control USB under high power

Discussion in 'Computers, Hardware, and Operating Systems' started by K8EA, Mar 9, 2016.

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  1. K8EA

    K8EA Premium Subscriber QRZ Page

    Help needed. I often lose my USB radio control connection between my TS-590SG and my computer when running 1400-1500 watts (AL-1500 amp). I have tried many of the usual remedies. This does not happen everyday, but happens often and when it does it persists. Doesn't happen at low power. I have torroids, moved the cables, good grounding, etc. I don't have an obvious excess RF in the shack issue that I can detect. Any suggestions would be helpful.
    Ed/K8EA
     
  2. KA9JLM

    KA9JLM Ham Member QRZ Page

    Trying a different USB port may help.

    Good Luck.
     
  3. N0SYA

    N0SYA Ham Member QRZ Page

    Also, not all usb cables are equal.
     
    K8EA likes this.
  4. KA9JLM

    KA9JLM Ham Member QRZ Page

    That is very true. External hubs can cause problems too.
     
  5. W8JX

    W8JX Ham Member QRZ Page


    You have RF in shack that is getting into computer. It could be via USB cable or another route and USB failure is result. Try a shorter USB cable abd keep all run to and from computer short. Where is you antenna in relation to shack and what type is it? What bands it issue on?
     
    KK4NSF and K8EA like this.
  6. KA9JLM

    KA9JLM Ham Member QRZ Page

    That sounds about right. I field strength meter will tell for sure.

    What really sucks is when it locks up in transmit. :eek:
     
  7. W1XWX

    W1XWX Ham Member QRZ Page

    Had the exact same issue-- when I keyed up on certain bands the USB ports on the computer across the room would all disconnect. I solved this issue by using braid and bonding all the equipment to a single point -- with a short run to a ground rod right outside the shack window. Previously I had been using 8 gauge wire.
     
  8. K8EA

    K8EA Premium Subscriber QRZ Page

    Thanks for all replies. I have central point grounding on all equipment but have NOT grounded the PC's chassis. Is it advisable to ground the PC chassis with the station ground buss?
     
  9. W1XWX

    W1XWX Ham Member QRZ Page

    Yes, however I personally did not do that and still solved the RFI issue. I run a Flex 3000 with an ALS600 amp by the way. The other thing I did at the same time was to install ferrites on all the wall warts in the shack. Try grounding the computer chassis and telling us what happens. Braid seemed to be the solution for me--- all to one point (NOT a buss-bar which I previously used).

    Also in my case I have a choke balun on the long wire, and the tower beam coax shield is grounded to the tower legs and also to the pass-through panel. The run to the ground rod from the single point is VERY short. Note that I eliminated the buss bar and just attached all the ground straps to one single point with a stainless steel bolt , washers, and wing nut.

    You can see videos about this on my YouTube site -- just search for "telescopeman" on youtube. I have a 9 part series of videos for beginning hams a couple of them are about grounding.

    Also whatever cable connects the radio to the computer (USB?) put 2 magnets on that cable one on each end..
     
    Last edited: Mar 10, 2016
  10. KM4BLG

    KM4BLG Ham Member QRZ Page

    I would say that this is your best possibility. However, I would make sure you are not drawing too much power somewhere and starving a circuit of power. Probably unlikely, but worth a shot.
     
  11. K8EA

    K8EA Premium Subscriber QRZ Page

    Thanks for all of the thoughtful replies. I solved the problem. I found a heavy duty, high quality cable and (duh?) replaced the other cable. This one works flawlessly with NO torroids. So I guess the cable was bad or inferior.
    Ed/K8EA
     
    W1XWX and KA9JLM like this.
  12. KK4NSF

    KK4NSF Ham Member QRZ Page

    I agree. I had the same problem not long ago. One other thing you can do is make sure you properly ground your computer chassis.

    Another related issue I've had is RF from the computer showing up as noise in my receiver. Again, grounding the computer made a big difference.
     
  13. W1XWX

    W1XWX Ham Member QRZ Page

    Yes I use a Granite brand Firewire cable from Flex to computer no rfi but they are pricey cables. Guess that's what you pay for! :)
     
  14. VA7MMW

    VA7MMW Ham Member QRZ Page

    Same issue here; FT8 transmissions on 20m would disconnect a particular piece of equipment connected to my computer by a USB cable. After trying multiple ferrites on all i/o cables to the usb-connected box without success, found this thread. Replaced the USB cable and the issue disappeared. In addition to suboptimal usb cable shielding, the issue could also possibly be related to USB cable length related to frequency of transmission.
     
  15. WA9FZB

    WA9FZB XML Subscriber QRZ Page

    Just "for the record" if you need a high-quality shielded and choke-protected USB cable, look for the ones from TrippLite. Each conductor is shielded, and there are ferrite chokes on each end of the cable. This was advice given to me (from others here) when I had USB connectivity loss on my TS-590S. It solved my problem.

    I also seem to remember seeing a couple of articles about TS-590S radios having a high rate of failure of the USB interface board within the rig. These users had to either replace the board or switch to using the DB9 serial connector with a USB-to-serial adapter.
     

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