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Author Topic: using glue vs. nut n bolts to hold new flashbox input coil supports  (Read 4533 times)
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N3DRB The Derb
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« 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?
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w3jn
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« Reply #1 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.
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FCC:  "The record is devoid of a demonstrated nexus between Morse code proficiency and on-the-air conduct."
WA1GFZ
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« Reply #2 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.
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N3DRB The Derb
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« Reply #3 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.
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WBear2GCR
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Brrrr- it's cold in the shack! Fire up the BIG RIG


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« Reply #4 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?  Roll Eyes

I'd suspect Squirrels or Racoons myself... "shhhh...I'm whuntin warmits!" -E. Fudd


             _-_-bear
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_-_- bear WB2GCR                   http://www.bearlabs.com
N3DRB The Derb
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« Reply #5 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.

* 027_24A.jpg (18.47 KB, 206x319 - viewed 370 times.)
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WA1GFZ
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« Reply #6 on: March 15, 2008, 03:24:54 PM »
one good zap cured one of the kids here.
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k4kyv
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Don
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« Reply #7 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.
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Don, K4KYV                                       AMI#5
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Patrick J. / KD5OEI
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« Reply #8 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!
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N3DRB The Derb
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« Reply #9 on: March 16, 2008, 02:37:15 AM »
okey dokey brass it is. Thanks for the input guys.

Don, heard you testing briefly around 2 am. pretty good signal.
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