Common Questions | Greyline Performance

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Common Questions

The questions operators ask most. If yours isn’t here, call us at 435-200-4902 or use the contact form.

Ordering & Products

Which antenna is right for me — DXF or DXV?
The DXF is the flagpole version — it looks like a residential flagpole and flies a full-size flag. Ideal for HOA neighborhoods and anywhere aesthetics matter. The DXV is a bare vertical — same physics, no flagpole appearance. Better for rooftop, commercial, or rural installs where the flagpole look isn’t needed. Both use identical VDA technology and cover 160 through 6 meters. The Selection Guide walks through the full decision.
What size should I order?
The DXF20 is the most popular for standard suburban lots — it is the scale most people picture when they think "residential flagpole." Smaller lots, high-wind regions, or townhomes favor the DXF12 or DXF16. If you want maximum low-band aperture (especially 80 and 160 meters), go taller — the DXF24 and DXF28 have a meaningful advantage there. All models cover 160 through 6 meters.
Do I need the ATU bundle or can I use my own tuner?
You can use your own tuner. Consider your power requirement against the ATU power rating, use quality coax, and install the tuner at one end of the line or the other (at the antenna, or at the radio desk). Both remote ATUs and desktop tuners are widely used with Greyline antennas.
What is the lead time?
The bench is current: most antenna systems are shipping in under a week, though we ask you to allow up to 3 weeks. Check the Order Status page for current production status. We build in Sun Valley, Idaho.

Installation & Setup

Does it really work without radials?
Yes. The Greyline VDA is a vertical dipole. Return current flows through the lower element rather than through a buried radial field, which significantly reduces ground coupling and removes the dependency on soil conductivity. Most of us do not live on salt water, and with this design we do not need to. The antenna’s 2-inch pole footprint is a very small ground signature for full HF coverage. A traditional vertical’s radial field can extend hundreds of feet at 160 meters, running toward every noise source on the property. The VDA goes where you put it — as far from interference as your lot allows. Some capacitive coupling to ground always exists, but performance does not depend on soil conductivity. Mount it on a rooftop, on asphalt, or in frozen ground and it performs essentially the same as a ground mount. Full physics explanation here.
What coax and choke do I need?
LMR-400 or equivalent low-loss coax is always a good idea. A 1:1 current-mode RF choke in front of the tuner is the correct placement — it prevents RF from traveling back down the feedline into the shack or gear. Do not skip the choke. The Tuner Configuration Guide covers exact placement and specs.
Where is the best place to install the antenna on my property?
Run a noise audit before you dig. The VDA’s 2-inch pole footprint means you can place it wherever your lot is quietest, not wherever a radial field happens to end up. Here is how: grab a battery-powered AM radio (no connection to house wiring), tune off any broadcast station so you hear just noise, and walk your property. Note where it is quiet and where it is loud — near the utility meter, HVAC units, the neighbor’s panel, and LED lighting are typical loud spots. Install in the quietest zone you find. Ten minutes of walking pays off every single day you operate.
How much concrete do I need for the ground sleeve?
One standard 50-lb bag of fast-set concrete is sufficient for most residential installations. Dig the hole 3 feet deep, set the sleeve, fill with concrete, check plumb with a level, and allow 24 hours cure time before loading the pole.
My tuner will not tune on 160 or 80 meters. What do I check?
In order of likelihood: (1) Verify that only one 1:1 choke is active in the system. (2) Verify you are using the correct feedline type (coax, not ladder line, for standard installations). (3) Reset the tuner memory and retune from scratch. If you are still stuck, call us. Remember that some tuners are very small, and asking one to reach 160 meters may be a tall order. In that case a larger tuning unit is the better answer.

Performance

What bands does it cover?
All of them — 160 meters through 6 meters from a single feedpoint with an ATU. No band switching, no separate antennas. The OCF feedpoint position is specifically chosen to optimize multiband coverage across the full HF spectrum, including WARC, MARS, military and commercial service bands as well.
How does it compare to a wire dipole or end-fed?
Favorably in most residential scenarios. A wire dipole or end-fed has to be hung considerably higher than a Greyline to match its low-angle performance. Horizontal wire also requires far more space, is visually obvious, and often has a worse noise floor: common-mode pickup on the feedline plus close proximity to the neighbor’s noisy devices. The VDA’s balanced feedpoint design significantly reduces common-mode noise. Operators consistently report a cleaner received signal compared to their previous wire antennas.
Will it work with my radio at 100 watts?
Yes. 100 watts is well within spec for every model we build. If you run an amplifier, match the tuner to the power: the LDG RT-100 bundled tuner is rated for 125W, so higher power calls for a higher-rated tuner. Call us with your amplifier and duty cycle and we will spec the right system: 435-200-4902.

HOA & Aesthetics

Will my HOA approve this?
In most cases, yes — because most CC&Rs explicitly permit residential flagpoles, and the DXF is a genuine commercial-grade flagpole. The antenna function is entirely internal and invisible. We provide a complete HOA approval toolkit including the Architectural Brief, Property Value FAQ, and Commercial-Grade Guide. Full approval toolkit here.
What does it look like from the street?
A premium residential flagpole. Polished aluminum, clean lines, flies a full-size American flag. No visible stubs, no loading coils, no radial wires. It is designed to look like exactly what an architectural committee expects to see in a front yard, and operators regularly tell us their neighbors compliment the installation.

Question not here?

Call 435-200-4902 or use the contact form. We are operators — we are glad to help.

Ham Radio is fun again! Pass it on... 73, The Greyline Performance Team