[TowerTalk] Mastrant rope

[W7TMT - Patrick]

Peter,

Yes, Mastrant has a Dyneema core but also has a woven UV protective cover which the Samson pure Dyneema line suggested in a previous post does not. Dyneema, and Spectra a similar modern fiber, are not very UV resistant. Although they both are offered with a chemical coating for UV protection those coatings are not as robust as a double braided polyester, or similar woven covering.

It's great that Mastrant has brought this line technology to the Ham Radio market, but these high-tech fibers have been in the marine market for many years and for good reason. High strength, low stretch, and light weight. Stronger than steel, stainless steel in the marine world, and lower stretch than the 7x19 SS that's the general standard in the marine standing rigging, i.e., non-moving applications that hold up the mast/tower.

As always terminations, i.e., knots, splices, eyes, etc. are an important consideration but that's true no matter the material. In the marine/sailing world there are modern material options that could eliminate pulleys/sheaves in wire antenna systems high in the trees for example. Modern chemistry and materials offer a lot of tech that's prevalent in other markets that are applicable to Ham Radio antenna applications and Mastrant is leveraging some of that with their great products.

73
Patrick, W7TMT


-----Original Message-----
From: TowerTalk <towertalk-bounces at contesting.com> On Behalf Of dj7ww at t-online.de
Sent: Wednesday, August 13, 2025 16:55
To: contesting, towertalk <towertalk at contesting.com>
Subject: Re: [TowerTalk] Mastrant rope


Mastrant rope IS Dyneema rope.

73
Peter, DJ7WW


-----Original-Nachricht-----
Betreff: Re: [TowerTalk] Mastrant rope
Datum: 2025-08-13T20:17:45+0200
Von: "James Wolf via TowerTalk" <towertalk at contesting.com>
An: "towertalk at contesting.com" <towertalk at contesting.com>

When I looked into this, the Mastrant ropes have a polyester coating that provides UV protection, where the Dyneema rope have a finish and a much lesser degree of UV longevity.  

Correct me if I'm wrong.

Jim - KR9U

<<< Why not try some Dyneema rope?  A local turned me on to it and it is a great product.  Mastrant also sells their version.  Not expensive. and a lot of sizes rom different vendors.  You do not need to go to DXE for everything.
https://www.amazon.com/dp/B08VN3DF9L?ref=ppx_yo2ov_dt_b_fed_asin_title&th=1


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