Although that is a good place to look, I think 15 seconds is pretty long for residual magnetism to hang on. What I have found and maybe the case with your relay is the 'lid' that keeps the solenoid in place is easily bent. There may be a deformation or something there abouts that would prevent it from retracting all the way out. Also, be careful soldering on to the terminals, they are very delicate and do not withstand a whole lot of heat applied to them. Mod-U-Lator, Mike(y) W3SLK ----- Original Message ----- From: "K4XM, Mike Dorworth" <[EMAIL PROTECTED]> To: "Discussion of AM Radio in the Amateur Service" <[email protected]> Sent: Saturday, September 16, 2006 6:59 PM Subject: Re: [AMRadio] Dow Key
> Okay... maybe I missed something the day they taught magnetism. I have > a Dow Key that sometimes stays energized with the source completely > removed. Not every time but sometimes. It has a 115 vac coil and > nothing else. No capacitor across it, no nothing. It's as if the coil > is acting as a capacitor and retaining enough of the 115 vac to keep the > armature of the relay engaged. It's name is " residual magnetism" High quality relays have a tiny brass screw in the center of the armature with an adjusting nut so that the armature can never quite touch or get too close to the pole piece. You might try a piece of scotch tape over the pole piece to keep it from getting too close.. Mike ----- Original Message ----- From: "Rick Brashear" <[EMAIL PROTECTED]> To: <[email protected]> Sent: Saturday, September 16, 2006 5:57 PM Subject: [AMRadio] Dow Key ______________________________________________________________ AMRadio mailing list List Home: http://mailman.qth.net/mailman/listinfo/amradio Partner Website: http://www.amfone.net Help: http://mailman.qth.net/mmfaq.html Post: mailto:[email protected] ______________________________________________________________ AMRadio mailing list List Home: http://mailman.qth.net/mailman/listinfo/amradio Partner Website: http://www.amfone.net Help: http://mailman.qth.net/mmfaq.html Post: mailto:[email protected]
