7mDXC LITE User Guide Mistake. There is no “double eye”, only an Upper Spreader Plate (triple top plate). I will amend this shortly. Thanks. Callum.
10m ABV Classic now has new hole spacings on driven (and the nylon plates) for equidistant spaced 3, 4 or 6 elements. For 3 or 4 elements, connect the SO239 flying lead to one of the end of one of the three-holes and connect the first element next to it. You will find holes either 120 degree or 90 degrees apart from there. For a 6-element system, connect to a center hole (within the three in a row) but miss out the opposite hole for element placement. You’ll work it out
Tubing: In the accessory box, there’s a longer length at about 8-10mm internal diameter (this changes from time to time depending on the width of the hose clamps) and one (or two) small sections which you’ll use at the very end of the project to slip over the top of the pole for the 40m element.
Hose Clamps: In the main, you will normally end up with 8-clamps (sometimes 7). Use the largest one for the very bottom – and work your way up the pole (after slipping on an appropriate length of tubing over it).
- You may also want to check the Telescopic Pole User Guide
Important Build Notes 10m All Band Vertical Classic (June 2018)
There are generally very few issues that builder have when assembling the DX Commander ABV system. If they do have issues, in the main slowing down and taking a break fixes almost all of them! And remember, if something genuinely isn’t right, I’ll replace it FOC (anywhere in the world).
Please remember, that this whole system is an experimental bit of fun. You can get it right and laugh in the face of $1,500 antennas whilst maintaining pureness in terms of tuned quarter-wave elements (5/8th in the case of 15m band). Please have some empathy for the crazyness of this project. Many (MANY!) people have an absolute ball with this system and understand that it it what it is, a fibreglass pole, some cut plates and a few nuts and bolts. But antennas don’t need to be expensive – it’s only an engineering solution to holding bits of wire up in the air.
But to make this a true production piece of “hardened” engineered solution, it would cost just as much as a SteppIR’s (BigIR Mark IV Vertical 40m-6m). Instead, this is cheap and cheerful – but with the same performance. Instead of a single element that varies in length, we nest each element like a fan-dipole.
So, you can save yourself nearly $1,200.
Wait: Unraveling the bunch of D10 wire. Find the end of the wire and remove the insulation tape from the roll I send to you. Ask your partner (or closest tree) to hold the end of the D10 and walk away, turning the D10 like a wheel away from you. Basically, just unwind it. D10 is EXTREMELY tough wire that is double-sheathed and has three tinned copper and four tinned steel wires. Because of this, it has some “memory”. but once it’s unwound, you can deal with it. To split the pair of wires, connect a battery drill and unwind from one end in a clockwise manner. Be careful though because you are now inducing another spin into each wire, so when you feel you have done enough, don’t just drop the now unraveled D10 to the floor. Instead, grasp each one and hold them apart whilst they “unspin” in your hands. You’ll get it
UPDATE for 2019 Spec
Guy plate: This is now manufactured in 8mm natural UHMWPE (up from 6mm) which is extremely substantial. Holes are the right size to fit elements (3, 4 or 6) and the guy point will allow 6mm carabiners to be connected with room to spare. Alternatively, just tie your guys to this point to simple guying stakes. I like carabiners because I can easily disconnect and lay antenna down and erect speedily. Having a 33% increase in plate thickness means much less bend too.
Mid Spreader: I was never quite comfortable with the lengths of the elements waggling around in the wind. The Mid-Spreader holds your elements firmly. It’s 5mm UHMWPE nylon. You can connect your 10m and 12m elements directly to this, saving yourself some paracord.
Upper Spreader: I was never quite comfortable with the 3mm thick upper spreader. It had too much bend and didn’t look quite right. I have now specified this at 6mm and it is much more substantial. I’m delighted with the result.
Upper Double-Eye: NEW. Again, 5mm nylon UHMWPE plate and is a very snug fit at the 7m point. I was never totally comfortable with the “Heath Robinson” arrangement for 30m and the way that 40m was fixed up the tube. This component solves the problem (and now in BLACK).
Miniature Carabiners: I am now shipping 2-packs of black plastic carabiners (gives you some spares). These are for making up the extensions for paracord (and shock-cord), connecting your elements to the upper spreaders. The holes on both upper spreaders are correctly sized to fir the carabiners.
Finally, don’t over-tension everything. Your shock-cord should still have a little ”give” left else you may over-stress the fork connectors.
D10 Complimentary Wire: I ship just over 100m of wire with all All-Band-Vertical orders. This is cheap-and-cheerful wire. Feel free to use your own. A reel of very nice flexible wire is just a few dollars (pounds) on eBay (for instance). In testing, D10 will happily accept 1500W key-down, full duty cycle RF for HF (tested with appropriate permit from Ofcom). The fire which you may have heard about was caused by a customer using 1000W of FT8 with the BLACK plastic plates which absorb RF slightly (not noticable below 400W). Regardless, 100% duty cycles (RTTY / FT8) is extremely hard wearing on all your equipment – be careful.
Permanent fixing: Many have done it successfully. Use some self amalgamating tape maybe and epoxy glue between the sections. I made a film about this here: https://youtu.be/ZamtSHzzVWQ. I have been informed by James that the glue “cracked” so you may want a different adhesive.
(Note for importers: Export trade tariff code from UK is 85176930).
* USA Import tax: None for under $800
Watch 3-part series of M0MCX building the DX Commander All-Band-Vertical for special-order
How to do a Fast Deployment of your DX Commander Antenna
Build Tips and Tricks
Using Hose Clamps to protect your investment
How to dismantle your DX Commander