Brian, As a long time sufferer of rfi, I think that may be your problem. Try this to determine if it's rfi. First, does it do this at all power levels? Try it into a real dummy load. Do you experience any rf 'bite' when you touch the metal of the key or mic? Is that keying circuit in a metal box with shielded cable?
You didn't say what kind of a rig but if the rig has more than one key jack, try switching. (this is a common problem with FT1000's) Try one of those clamp on torroids around the keying line. And the last resort, a 33 foot piece of wire, attached to the ground connector of the rig, and just placed out on the floor as straight as possible will serve as a counterpoise for 40 meters and usually solves rf problems. (rf on other bands require a counterpoise with a length relative to that band) If any of these help, then you know it's rf and you can approach the problem of improving shielding or grounding. Let me know if any of the above makes a difference and I'll give you some direction or source on curing the problem. It can be frustrating, been dere, done it, still fighting it. :-)) ----- Original Message ----- From: "Brian Boerner" <[EMAIL PROTECTED]> To: <[email protected]> Sent: Friday, February 01, 2002 9:27 PM Subject: [DXBase] serial keying > I've got kind of a weird problem. I built the cable to key from dxbase and > it works fine on all bands except 40m. When I try and use it on 40, it keys > down but never lets up and the rig stays in transmit mode until you hit a > button to switch bands. The switch can be from 40 to 40, so long as you hit > a button on the rig. It's very strange. Anyone seen this before? > > -bmb > > _______________________________________________ > DXBase Reflector - Please visit us on the web at www.dxbase.com > - - - - - - - - - - - - - - - - - - - - - - - > To UNSUBSCRIBE please visit: > http://mailman.qth.net/mailman/listinfo/dxbase > >
