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Title: using glue vs. nut n bolts to hold new flashbox input coil supports Post by: N3DRB The Derb on March 15, 2008, 03:57:04 AM I've made and drilled my input coil supports for teh flashbox. The material is brown bakelite.
I have mounting holes for brass hardware (4-40) but would the screws be a problem? there would be 2 per support for a total of 6 screws, lockwashers, flats, and nuts. I got pix but I cant go get the camera at the moment. would this amount of stray metal in the coil field have any practical bad effects? Title: Re: using glue vs. nut n bolts to hold new flashbox input coil supports Post by: w3jn on March 15, 2008, 07:01:00 AM Shouldn't, so long as they don't constitute a shorted turn and aren't close enough to arc over to anything.
Title: Re: using glue vs. nut n bolts to hold new flashbox input coil supports Post by: WA1GFZ on March 15, 2008, 09:41:39 AM In a small coil brass has the opposite effect of an iron core. The screws are so small there is no problem.
Title: Re: using glue vs. nut n bolts to hold new flashbox input coil supports Post by: N3DRB The Derb on March 15, 2008, 10:48:53 AM me and the wifey are going over to the market of fleas, then hit home depot for the hardware, then home and a coil winding we will go.
some pix to follow. Something yanked my ladder line out of the wall last night. I gotta go out and see what's up with that too. i hope a dog didn't get a hold of it. Title: Re: using glue vs. nut n bolts to hold new flashbox input coil supports Post by: WBear2GCR on March 15, 2008, 11:09:26 AM Derb-O-Matic,
Too bad the xmit wasn't on at the time the presumed "dog" grabbed on to it? ::) I'd suspect Squirrels or Racoons myself... "shhhh...I'm whuntin warmits!" -E. Fudd _-_-bear Title: Re: using glue vs. nut n bolts to hold new flashbox input coil supports Post by: N3DRB The Derb on March 15, 2008, 01:40:03 PM nope it was one of the dogs. This guy here did it. It was wrapped around his soccer ball.
I inspected, no damage to speak of, nailed it up to the house using coax clips. He wont get to it again. Title: Re: using glue vs. nut n bolts to hold new flashbox input coil supports Post by: WA1GFZ on March 15, 2008, 03:24:54 PM one good zap cured one of the kids here.
Title: Re: using glue vs. nut n bolts to hold new flashbox input coil supports Post by: k4kyv on March 15, 2008, 04:52:57 PM I would recommend using brass screws. From my experience, steel screws tend to heat up in strong rf fields or when carrying heavy current.
Title: Re: using glue vs. nut n bolts to hold new flashbox input coil supports Post by: Opcom on March 16, 2008, 01:22:14 AM Brass screws, yes.. the old Tucker's RF deck is full of them. A couple hundred of them!
Title: Re: using glue vs. nut n bolts to hold new flashbox input coil supports Post by: N3DRB The Derb on March 16, 2008, 02:37:15 AM okey dokey brass it is. Thanks for the input guys. AMfone - Dedicated to Amplitude Modulation on the Amateur Radio Bands
Don, heard you testing briefly around 2 am. pretty good signal. |