Thanks Neal,

I already have each piece of equipment with its own ground cable going back to 
a central 'neutral bar' which goes to my earth stake with extremly overkill 
copper cable.
Each earth strap to each piece of equipment is just flattened out RG213 braid - 
cheap and works great..

I do not daisy chain any earths



From: Neal Campbell 
Sent: Friday, January 01, 2010 2:19 PM
To: Anthony M 
Cc: Dudley Hurry ; flexradio 
Subject: Re: [Flexradio] Loss of TX power


Ferrite every cable touching the PC, make sure that you have a single ground 
point and everything is grounded to that (avoid group loops which are the worst 
to track down, for example, you ground the radio, then the shield of an audio 
cable grounds the computer to the radio and the computer has a serial 
connection to a rotor box which grounds the computer to the rotor and the rotor 
is grounded to the radio)
Neal Campbell
Abroham Neal Software
www.abrohamnealsoftware.com
(540) 242 0911

Amateur Radio: K3NC
Blog: http://www.abrohamnealsoftware.com/blog/
DXBase bug reports: email to [email protected]
Abroham Neal forums: http:/www.abrohamnealsoftware.com/community/






On Thu, Dec 31, 2009 at 10:12 PM, Anthony M <[email protected]> wrote:

  I have Ferrite chokes on the firewire cable (3 actually).. I might try 
putting a couple of chokes on EVERY cable that goes into the PC..
  Not sure what else to try as I have that many chokes on the feedline I 
"doubt" its that..


  --------------------------------------------------
  From: "Dudley Hurry" <[email protected]>
  Sent: Friday, January 01, 2010 11:54 AM
  To: "Anthony M" <[email protected]>
  Cc: "flexradio" <[email protected]>
  Subject: Re: [Flexradio] Loss of TX power


    RF is getting into the computer or FireWire cable somewhere and stopping 
the TX thread..  I bet it won't do it into a dummy load..

    73,
    Dudley

    WA5QPZ



    Anthony M wrote:

      Hi Guys,

      Having a weird problem - (Flex 3000, Windows 7 x64 - Firewire driver and 
software up to date from flex website)
      When using Digimodes, I get halfway though a QSO on PSK - then all of a 
sudden I notice ive stopped transmitting any power..
      (50watts normally, but I look over and 0watts output).. I close PowerSDR 
and retry, no change. I close PowerSDR AND switch radio off for a sec then back 
on, and its back to normal until it happens again..

      I have low SWR (less than 1:5:1) and only running 50Watts..

      Very Very annoying..



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