Alternatives to Knots

last updated 9 January 2022

For those who aren’t comfortable tying knots, there are a number of alternatives available.

In some cases these may require tying knots to prepare them initially, but once that is done, knots aren’t required each time the antenna is set up.

Note that some devices need to be sized appropriately for the rope you are using: most will work over a range of sizes, but may not hold if the rope is too small.

pre-tied loops of rope

This may seem like an odd way to avoid tying knots, but they only need to be tied once. And the more I have experimented with the other devices I describe here, the more I use them: you will see several examples in the photos.

Rock climbers call these “slings”. The length of rope can vary from less than 30 cm ( 1 ft ) to 2 m ( 6 ft ) or more, depending on the application. I suggest using bright colored rope if you have it, so you can see them better. Longer ones might be a single piece of rope with a pre-tied loop at each end.

Mostly I use these for anchors, especially to tie to inconvenient places (perhaps inside a bush) and I want the rope adjustment point out where it is easier to reach. They can also be placed around branches, posts, tree trunks, etc., where it may be difficult to use the main rope. You can then clip a carabiner to the loop to connect it to whatever else you need.

Such loops can also be tied as a Prusik Hitch, which makes it easy to adjust the tension on a rope. (It is very easy to do, so I consider this an alternative to tying a tautline hitch.)

carabiners

Carabiners are classic pieces of alpine / rock climbing equipment, but smaller versions have become popular that aren’t rated for climbing. If two ropes have loops tied on the ends, it is easy to use a carabiner to connect them together. They can also attach a rope loop to an eye bolt, fence wire, tree branch, or anything else that the carabiner can be clipped around. By using small pre-tied loops of rope they can be used with larger pipes or trees.

Different types of carabiners. The big one on the right is for rock climbing, while the others are not intended to hold weight. They are quite adequate for light weight antennas, however, as a replacement for tying knots.

cleats

A cleat is a traditional way to secure a rope on a sailing ship, where ropes under tension needed to be tied and untied quickly. It is often used for the halyards on flag poles. They are available commercially, and can be improvised from local materials. These are particularly suited for use at the base of a mast or fixed object.

The cleat is typically mounted to a fixed object. The rope is wrapped around the cleat under tension, then the rope is wrapped back and forth across the cleat to secure it. It has the advantage that, as it is released, it provides smooth control of the rope under load.

rope adjusters

There are several types of rope adjusters available that make it easy to set the tension on an antenna. Perhaps the most common type sold for tent ropes is a flat or curved piece of metal or plastic with 3 holes in it, like this:

Simple tension adjusters. These work best when the loop formed can be slipped over the top of a tent stake, etc.

While these do work, they are designed for use with a tent stake, or other anchor where the loop at the end of the rope can be placed over it. It is more difficult to use this type of adjuster when tying a rope to a tree, for example, where you cannot slip it over the top of the trunk. One approach would be to use a smaller loop of rope or bungee cord around the tree, then hook the rope to that with a carabiner. (It can also be used if the adjuster is removed from the rope and replaced with the rope around the tree, but that isn’t as convenient.)

As commonly configured in the photo, with one end of the rope attached to the device, the rope can’t be shortened by more than half its length.

Note that plastic tensioners of this type can also be used as antenna insulators.

I recently have been experimenting with several other types. So far, they seem to work best when the device is attached to the anchor, and the rope passed through it. (This keeps the adjustment point at a constant height.) To accomplish that, I have tied small loops of rope to the adjusters that can secure it to a nail, branch, hook, or whatever is available. Then I double over the rope to make an “end” that is passed through the device. These actually work quite well, although there is a danger of forgetting and leaving the tensioning device attached to the tree when you are taking down the antenna. For that reason I prefer bright colored rope for the loop, to make it easier to see. There may be other ways to use these – I am still experimenting.

cord locks

The push-button cord locks used on drawstrings for clothing, also can work well here. By folding the rope and passing it through the hole, it makes a loop that can be slipped over, or clipped to, an anchor. The rope can be adjusted when the lock is squeezed, then locks into place when it is released.

Drawstring closure for raincoat hoods or other clothing. When it is pressed, the rope can be adjusted, then it locks into place when it is released. Here the rope is shown clipped with a carabiner to a tied loop that is passed around an anchor.

These also make great tuning adjustments for the ends of wire antennas.

A cord lock used to adjust the resonant frequency of an antenna.

Here the end of the purple wire is tied to the insulator after the cord lock is slipped onto it. Then the free end of the wire is passed back through the cord lock. Sliding the cord lock up the wire raises the resonant frequency of the antenna, as more of the wire is folded back, while letting the end of the wire hang down. That allows field adjustment of wires if needed.

Another method, which isn’t as strong, but may be easier with existing antennas.

Cam-Jam®

The Cam-Jam® is a spring-loaded tensioning device built into a clip like a carabiner. These come in different sizes, and it is important to use the right size for your rope. I often use ropes that are a little bit too small for the ones I have, so I am still experimenting with these as well.

This Cam-Jam® is rated for 2 – 5 mm rope. The main rope passes through a hole on the back side, and can be pulled into the cam. Pulling on the end will tighten the rope. Pulling sideways on the end (towards the camera) will release the rope.

Often my rope is longer than I need for the anchor, but I don’t want to cut it, or pull all the excess rope through the hole. In that case, I can double the rope and pass it through the hole. With small ropes, the doubled portion can be locked in the cam, but larger ropes may not fit. In that case, make sure that the side under tension is locked in the cam, otherwise it may pull out.

When used in the middle of a rope, make sure that the end under tension is locked in the cam.

clothespins

I started using spring clothespins for field tuning of my dual-band dipole, and other antennas. But they are also useful for anchoring the ends of antennas to branches in the forest, and other things. This is often faster than trying to tie to them. The wooden ones may not grip as well as the plastic ones, but could be modified to give more friction.

Plastic clothes pin used to anchor the end of an antenna rope to a branch.

twist ties / pipe cleaners

This is another quick way to tie off the end of an antenna to irregular objects. Twist ties are typically short plastic-covered wires used for sealing plastic bags. Pipe cleaners were originally used for smokers to clean out their pipes, but commonly are sold for children to twist into shapes. Either can be quickly twisted around a branch to secure an antenna.

A red pipe cleaner twisted around a branch to secure the end of an antenna. In this case, the pink loop attached to it forms a prusik knot around the rope to adjust the length.

Any sort of stiff wire can be used the same way. One of my favorite way to hang a temporary VHF vertical antenna like a roll-up J-pole is to tie a wire hook on one end and hang it over a branch with a long pole. Then, to take it down, I just pull on the feedline so the hook wire straightens out and the antenna falls down.

split bolts

These are intended to connect wires together. They are in the form of a large bolt with a lengthwise slot: the wires are placed in the slot, then the nut is tightened. These are convenient for securing the ends of larger antenna wires to insulators, while still allowing the wire to be adjusted for tuning. They can also be used for quick splices if a wire breaks.

In this case, 3 split bolts are used to secure the antenna wire to the insulator. It also shows the use of a quick link to connect the insulator to the rope. (Here the end hole in the insulator had to be drilled larger to attach the link, so it works best with plastic insulators rather than ceramic.)

bungee cords and straps

Elastic bungee cords and various types of straps with a buckle or Velcro© closure are convenient for securing the base of masts to available supports. Usually this works best with at least two of them. The can also be used for bundling mast sections together for transport. With thin telescoping fiberglass masts, these are less likely to result in breakage than using metal brackets that focus the pressure at a single point.

Temporary mast secured to a fence post using a bungee cord (top) and a nylon strap (bottom).
Temporary mast mount using a bungee cord and a spading fork.