Short of having a machinist build me some, can anyone advise where I
might be able to buy this part for a home made antenna project....

I need an addapter that is 3/8" x 24 thread on one end, and a 1/2"
tube on the other... to fit over 1/2" fiberglass rod. I can use 3/8" to
5/8" rod diameters to meet this part specs, if necessary.

Stainless steel or brass would be fine.


Ed K7AAT

Ed wrote:

Short of having a machinist build me some, can anyone advise where I
might be able to buy this part for a home made antenna project....

I need an addapter that is 3/8" x 24 thread on one end, and a 1/2"
tube on the other... to fit over 1/2" fiberglass rod. I can use 3/8" to
5/8" rod diameters to meet this part specs, if necessary.

Stainless steel or brass would be fine.

Ed K7AAT

Buy a long 3/8"x24 bolt, hacksaw off the head, then expoxy some pipe with
1/2" inside diam in over the end. Make sure the part extending into the
pipe is long enough.

Irv VE6BP (Not a machinist, just an idea as to how I'd do it)
--
--------------------------------------
Diagnosed Type II Diabetes March 5 2001
Beating it with diet and exercise!
297/215/210 (to be revised lower)
58"/43"(!)/44" (already lower too!)
--------------------------------------
Visit my HomePage at http://members.shaw.ca/finkirv/index.html
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--------------------
Irv Finkleman,
Grampa/Ex-Navy/Old Fart/Ham Radio VE6BP
Calgary, Alberta, Canada

Buy a long 3/8"x24 bolt, hacksaw off the head, then expoxy some pipe
with 1/2" inside diam in over the end. Make sure the part extending
into the pipe is long enough.

Thanks, Irv. Possibly workable for me, but the threaded end needs good
RF continuity to the 1/2" tube end, which will be soldered to a helical
winding running up the fiberglass rod.


Ed

Ed wrote:
Thanks, Irv. Possibly workable for me, but the threaded end needs good
RF continuity to the 1/2" tube end, which will be soldered to a helical
winding running up the fiberglass rod.

Connect the helical winding to a 3/8" automotive lug and slip it over
the 3/8" threaded section.
--
73, Cecil http://www.qsl.net/w5dxp

Connect the helical winding to a 3/8" automotive lug and slip it over
the 3/8" threaded section.

That will work, Cecil. Especially is I run a nut up on it to tighten on
the lug. Thanks.


Ed

PS: Am still looking for the one that antenna manufacturers use, though.

Do you ever get to Central Oregon? Or send a drawing with dimensions.
Like how long is the threaded portion? How long is the tube part? If
you can make to Redmond, I will volunteer to make it for you.

Paul, KD7HB

The ham spirit is still alive and well. Great to know hams are still willing
to lend a hand to a brother ham.

You are to be commended!

wrote in message
ups.com...
Do you ever get to Central Oregon? Or send a drawing with dimensions.
Like how long is the threaded portion? How long is the tube part? If
you can make to Redmond, I will volunteer to make it for you.

Paul, KD7HB

Do you ever get to Central Oregon? Or send a drawing with dimensions.
Like how long is the threaded portion? How long is the tube part? If
you can make to Redmond, I will volunteer to make it for you.

Paul, KD7HB

Thanks, Paul. Your reply is appreciated, as Fred mentioned. There
actually may be a time next Summer when we might get over there. Sister
in Law lives in Prineville. We were in Redmond for that big RV
convention this past summer, but didn't spend any time looking around
town. I'll keep your callsign/email in case we do get there again this
coming year.

I take it you're a machinist? Maybe, after the Holidays, I'll
contact you by email and discuss this again... I may be able to
email you pictures or drawings of what I'm looking for when I get a
chance, to get your opinion on what I'm looking for..


Ed

Irv Finkleman wrote:

Ed wrote:

Short of having a machinist build me some, can anyone advise where I
might be able to buy this part for a home made antenna project....

I need an addapter that is 3/8" x 24 thread on one end, and a 1/2"
tube on the other... to fit over 1/2" fiberglass rod. I can use 3/8" to
5/8" rod diameters to meet this part specs, if necessary.

Stainless steel or brass would be fine.

Ed K7AAT


Buy a long 3/8"x24 bolt, hacksaw off the head, then expoxy some pipe with
1/2" inside diam in over the end. Make sure the part extending into the
pipe is long enough.

Irv VE6BP (Not a machinist, just an idea as to how I'd do it)

As a modification to this, since you can stand 1/2 inch thread, how
about using a 1/2 inch bolt and brazing or silver soldering some 1/2
inch ID tube over it? Not only will this be easier than trying to
center the 3/8 and potentially stronger than epoxy, but it would keep
that RF continuity.

This is the sort of part that's expensive to turn out as a one-off part,
but very easy to manufacture on an NC lathe -- even a cam-driven
automatic screw machine would handle this with ease. Because of this I
suspect that there aren't any on the open market; rather a manufacturer
would just send drawings to their favorite screw machine place to have
them made 10000 at a time.

It's also the sort of part that's fun to make in limited quantity -- it
looks pretty, you get to practice your threading, yet its not too
critical. So you might want to take up Paul's offer, perhaps with a
nice drawing. Just don't ask him to make too many.

--

Tim Wescott
Wescott Design Services
http://www.wescottdesign.com

Good information, (below), thanks. On the issue of availability,
though, I have to wonder why they would NOT be available for sale?
Obviously, certain manufacturers of the multitude of ham-stick type
antennas use them. There must be a large scale source, somewhere!

Ed




As a modification to this, since you can stand 1/2 inch thread, how
about using a 1/2 inch bolt and brazing or silver soldering some 1/2
inch ID tube over it? Not only will this be easier than trying to
center the 3/8 and potentially stronger than epoxy, but it would keep
that RF continuity.

This is the sort of part that's expensive to turn out as a one-off
part, but very easy to manufacture on an NC lathe -- even a cam-driven
automatic screw machine would handle this with ease. Because of this
I suspect that there aren't any on the open market; rather a
manufacturer would just send drawings to their favorite screw machine
place to have them made 10000 at a time.

It's also the sort of part that's fun to make in limited quantity --
it looks pretty, you get to practice your threading, yet its not too
critical. So you might want to take up Paul's offer, perhaps with a
nice drawing. Just don't ask him to make too many.