RadioBanter - View Single Post - SUPER J-POLE BEATS YAGI BY 1 dB

February 10th 05, 02:24 AM

wrote:

Also, solder has VERY little
mechanical strength. Almost none.

It's a bad idea.

If the connector is holding weight then something else is wrong
as you would normally secure the cable to the supports. Strength
is not an issue then. Also most cut a small slot so the corner is
acutally in a grove, adds imensely to strength.

Sure you better have strain relief, but i
still wouldn't rely on the soldered corner of
an SO-239.

Aluminum is not solderable.

Again your wrong. It's solderable but, you do have to know how and
use a decent heat source. Though bolted connections would work.

Ok, you can solder aluminum, but most
people don't know how, and it's not done often.

We used a length of Delrin rod for the center
conductor, it's slightly flexible but ultra strong.
Don't use a wooden dowel coated w/epoxy, it will break.

Delrin works, not easily obtained and often not the right size
meaning a machine shop may be needed. Doesnt solve
the problem of the phasing loop sagging and failing.

Wrong. Tap Plastics. In sizes that fit
3/4" or 1/2" or 1" copper perfectly.

Delrin is perfect for the Super J.

Don't use wood.

Our phasing loop doesn't sag and
hasn't failed yet.

The phasing loop was something like AWG#4
solid copper wire. Hasn't failed for 3 years,
but Ca. is a bit less harsh, indeed!

CA is timid save maybe for wind and mountain weather. The use of #4
CU is very heavy and adds to the problems. The problem in that case
is #4 has a low strength to weight ratio. Most use hard drawn 1/4"
copper or brass tube which is far more satisfactory.

It may have been #6, but it was fine
for our purposes.

Slick