On 3/18/21 11:36 AM, Michael Tope wrote:
When using the solder-soaked braided coax, bear in mind that it if you
flex it enough the solder starts to crack. Often you'll see the solder
first crack in the area where the shield intercepts the connector
body. If you are going to form a choke and leave it alone, that
probably won't be an issue. I don't have any experience using coax
like this in an outdoor environment, so I would be hesitant to wrap it
around a stack of toroids and then hang from the feedpoint of an
antenna without some sort of enclosure to protect it from the
environment (and to provide mechanical strain relief for the
connectors). YMMV.
73, Mike W4EF...............
Very much agree. The handforming is nice, but if it's jacketed, it can
crack and you can't see the crack. In fact, you can't see the cracks
sometime in the unjacketed stuff.
Bend radius will also be an issue. Those popular 2.4" cores are about
1/2" on a side cross section. The minimum bend radius for the
handformable stuff is 0.6 inches, so the "turn" would be 1.2" in diameter.
Unless you happen to have a big heap of the stuff sitting around, I
can't really see the advantage over using a flexible coax, other than it
"looks cool". And just like chromed tail pipe extensions, they DO make
the car go a little bit faster, don't they?
On 3/18/2021 9:19 AM, Byron Tatum wrote:
Just a note -- The actual semi-rigid cable (silver plated copper
tubing outer conductor 0.141" OD) that is being discussed RG-402 has
an equivalent in a "conformable" cable. This conformable cable is the
same construction except instead of solid copper tubing outer
conductor it has a solder-soaked braid. Easier to work with and same
electrical properties. Huber-Suhner produces one called "Sucoform"
and another called "Sucoflex". I use the RG-401 size (0.250") for
making short jumpers in my VHF/UHF station, using the same connectors
made for RG-401 semi-rigid. These connectors are easy to find and not
expensive, if you dig around a little. This 0.250" cable has very
high power handling ratings at VHF/UHF. There is a Chinese supplier
of conformable cables on eBay. You can get both of these sizes with
or without a jacket. The Huber-Suhner cable Sucoform has no
jacket.Just some limited information from my experience,Byron W5FH
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