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Xiegu VG4 4-Band Base Station Vertical Antenna | for HF Transceiver | 40m/20m/15m/10m

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SKU: 715-RP-HM75
  • £221.00
  • Regular price £246.00 SAVE £25.00


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4-Band Vertical Antenna: The VG4 is a 4-band Ground Plane type antenna made of aluminum alloy with an anti-oxidation coating. It covers 40/20/15/10 meters. The user trims the antenna to the part of the band as needed.

Automatic band switching: The antenna has a single coax cable feed however each band is individually tuned with a low VSWR across the band. Through fine-tuning, the best (rock-bottom) SWR can be achieved on the user’s choice of frequency within the band. The band selection is 100% automatic through the single feed, just switch bands on the radio.

No extra ground peg or radials are needed: The antenna has its own effective counterpoise replacing the need for radial wires.

Physical: This antenna is light, but built to last and is easy to install. Suitable even for homes with only a small space available. It is perfect for roof, patio, small backyard, condo and motorhome installation.

Top loading: Parallel resonators are used to give the best vertical-element efficiency. End loading of the lower HF band sections (capacitive hats) allow efficient operation with a reduced antenna height.

Outdoor weather ability: The VG4 is rated for high wind environments. After a normal installation, it can resist a category one hurricane with no guying required.

*Note: The actual wind resistance level depends on the method and the firmness of the installation (mainly depends on the fixed object). And please pay attention to lightning protection.

CLICK HERE to download user manual.
CLICK HERE to read the detail review report.


RELATED BLOG
Xiegu VG4 Review | First Impressions, Tuning Notes, and Initial Experience
--- by Eric N Balles, W1ENB Introduction I have recently reengaged in the amateur radio hobby after a long hiatus. My primary technical focus is currently on practical and efficient antennae. Like most everything in life, antenna design, configuration, mounting, orientation, etc., are a compromise involving numerous variables. Most of my experience to date has been with simple wire antenna and I have enjoyed reasonably good performance even near the solar cycle minimum (e.g., Boston to Ukraine voice contacts using a 40 m EFHW at 5 watts). My interest in exploring vertical antennae and specifically the Xiegu VG4 was to evaluate (qualitatively for now) potential benefits and tradeoffs between antenna types – with verticals, for example, having a low take-off angle and radiating uniformly in the azimuthal direction versus the higher take-off angle and radiation nulls that horizontal center fed dipoles and EFHWs exhibit. The VG4 covered the four bands of most interest to me, and I was especially interested in its 40 m capability.   Initial Impression • All items received, nothing missing, neatly packed • Counterpoise and capacitor hat radials as well as build hardware appear to be stainless (e.g., band clamps are all labeled 304 SS) • Machined components nicely done, chamfered holes, etc. • Matching transformer box has a thick gasket and weep hole • Traps have a well-formed elastomeric seal at the top and generous weep openings at the bottom; trap orientation is clearly labeled • Total weight of the antenna components (measured on an electronic balance) was 5.1 kg • Supplied tools are a nice touch – especially the L-shaped wrench for tightening the band clamps   Antenna assembly went very smoothly. The supplied instructions were sufficient but perhaps could benefit from additional information. I made my own initial choice on tube-to-tube insertion lengths (see below in Initial Build section) and I received a quick response and an excellent photo from customer service to confirm the intended connection point for the braid coming off the matching transformer box (see photo). I understand that Radioddity and/or Xiegu are developing enhanced documentation for the VG4. Antenna Measurement Configurations My planned final installation was atop a 6.1 meter steel mast anchored below ground level and attached to the facia at the roof peak of a detached garage. Since I expected to be making numerous adjustments and measurements prior to and after final installation, I made measurements either: • [A] with the antenna mounted to a test fixture in a vertical orientation which had the counterpoise radials at approx. 2 meters above ground level; or • [B] with the antenna in a horizontal orientation across non-metallic supports that were approx. 2 meters above ground level (note: I removed the two counterpoise radials closest to the ground to minimize coupling effects); or • [C] with the antenna in the final location atop the steel mast with counterpoise radials at approximately 6 meters above ground level (and 2 meters above the roof peak). Antenna characteristics were measured primarily using a NanoVNA-H, calibrated using a short-open-load-through routine, and data captured using NanoVNA Saver (0.3.10) software. The sweeps were configured using 10 segments which provided 1000 data points per sweep. I also used an ICOM 7300 SWR graph feature to cross check the NanoVNA results at the final configuration and installation. All listed frequencies and VSWR measurements are from the NanoVNA unless otherwise noted.   Initial Build I decided to make my initial build with the radiating elements in their longest configuration to establish what the lowest resonant frequencies could be. To that end, I chose a 3 cm insertion length at each tube junction (approximately the length of the cut in each of the larger tube ends). The only exception was the tube sections between the 10 m and 15 m traps which came preassembled with the traps and I chose to leave that dimension as supplied. I pre-measured and marked lengths on each tube to help keep track of future adjustments. Ultimately, since I operate mostly SSB, I planned to optimize the VG4 configuration for the lower frequencies of the voice portions of each band. The initial build mounted in a vertical orientation on the test fixture [A] yielded the following resonant frequencies and SWR values in the four bands:   Initial Build / Measurement Configuration [A] Band Resonant Frequency (ƒ(r)) VSWR @ ƒ(r) 10 meter ƒ(r) = 27.8 MHz 1.3 15 meter ƒ(r) = 27.8 MHz 1.05 20 meter ƒ(r) = 14.0 MHz 1.05 40 meter ƒ(r) = 6.9 MHz 1.4 10 Meter Band Adjustments The 10 meter band radiating elements were easily accessible with a ladder so I was able to make adjustments and measurements while the antenna remained vertically mounted to the test fixture. I made three adjustments from the initial build length and observed the corresponding shifts in resonant frequencies.   10 Meter Band Adjustments / Measurement Configuration [A] Band Initial build -3 cm -6 cm -9 cm 10 meter ƒ(r) = 27.8 MHz ƒ(r) = 28.2 MHz ƒ(r) = 28.5 MHz ƒ(r) = 28.7 MHz 15 meter ƒ(r) = 21.2 MHz ƒ(r) = 21.2 MHz ƒ(r) = 21.25 MHz ƒ(r) = 21.27 MHz 20 meter ƒ(r) = 14.0 MHz ƒ(r) = 14.02 MHz ƒ(r) = 14.02 MHz ƒ(r) = 14.04 MHz 40 meter ƒ(r) = 6.9 MHz ƒ(r) = 6.9 MHz ƒ(r) = 6.9 MHz ƒ(r) = 6.9 MHz Of note is that the adjustments at this point showed a measurable shift in the 10 meter band resonant frequency with a modest change in radiating element length. At this configuration, a 9 cm reduction in length yielded a 900 kHz shift, or about 100 kHz increase in resonant frequency per centimeter reduction in section length ( -100 kHz/cm). I observed little to no change in resonant frequency for the lower bands with the 15 meter band shifting only about -8 kHz/cm.   Relationship Between Close-to-Ground Vertical and Horizontal Orientations I dismounted the antenna from the test fixture and laid it horizontally across supports (antenna measurement configuration [B] described above). Due to the VG4’s overall length, adjustments to the lower bands needed to be done with the antenna closer to ground level. Also, I wanted to see what, if any, correlations could be made between measurements made in a horizontal orientation near ground, in a vertical orientation in a test fixture near ground, and the final installation at 6 meters above ground level. This information would potentially be useful to minimize the number of times the antenna would need to be raised and lowered from its intended final installation.   Comparison of Measurement Configurations [A] vs [B] Band Configuration [A] Configuration [B] 10 meter ƒ(r) = 28.7 MHz ƒ(r) = 28.0 MHz 15 meter ƒ(r) = 21.27 MHz ƒ(r) = 21.22 MHz 20 meter ƒ(r) = 14.04 MHz ƒ(r) = 14.04 MHz 40 meter ƒ(r) = 6.9 MHz ƒ(r) = 6.9 MHz   At this point, it was encouraging to see a reasonable match of the resonant frequencies observed in the vertical and horizontal orientations albeit both close to ground. The thought is that one can take advantage of this by establishing the approximate relationship between length changes and corresponding resonant frequency shifts would facilitate easier initial band tunning. Resonant frequency shifts from close-to-ground orientations to final installation elevation will be discussed later. 15, 20 and 40 Meter Band Adjustments At this point, the 15 meter resonant frequency was close to my target and, without knowing yet how it may shift at final elevation, I decided to leave that element length unchanged. The 20 meter resonant frequency was significantly below my target so I ran through a set of length adjustments and corresponding resonant frequency measurements while the antenna was in the horizontal near ground measurement configuration [B].   20 Meter Band Adjustments at Measurement Configuration [B] Band post 10 m adjust -1.5 cm -6 cm -8 cm 10 meter ƒ(r) = 28.0 MHz ƒ(r) = 28.0 MHz ƒ(r) = 28.0 MHz ƒ(r) = 28.0 MHz 15 meter ƒ(r) = 21.22 MHz ƒ(r) = 21.22 MHz ƒ(r) = 21.22 MHz ƒ(r) = 21.2 MHz 20 meter ƒ(r) = 14.04 MHz ƒ(r) = 14.063 MHz ƒ(r) = 14.135 MHz ƒ(r) = 14.16 MHz 40 meter ƒ(r) = 6.9 MHz ƒ(r) = 6.9 MHz ƒ(r) = 6.93 MHz ƒ(r) = 6.93 MHz   Of note, as stated by Xiegu, there is essentially no impact on the upper bands when making adjustments to lower bands – so 10 m and 15 m resonant frequencies were not affected. And for the range of 20 m radiating element length changes carried out here, there was only a small shift in the 40 m resonant frequency. Empirically, for 20 meter band tuning, measurements suggest a resonant frequency shift with section length changes of approximately -15 kHz/cm. A similar exercise was carried out with the antenna in the horizontal near-ground measurement configuration [B] to determine the 40 meter band tuning guideline. Empirically, measurements suggest a resonant frequency shift with radiating element length change to be approximately 2.4 kHz/cm.   Relationship Between Close-to-Ground and At-Final-Elevation Measurement Configurations At this point, I felt I had enough empirical information in hand for the close-to-ground configurations and was ready to raise the antenna to its final elevation. I made a final set of measurements in all three measurement configurations for the antenna as left from the most recent experiment above.   Comparison of Measurement Configurations [A] vs [B] vs [C] Band Configuration [A] Configuration [B] Configuration [C] 10 meter ƒ(r) = 28.7 MHz ƒ(r) = 28.0 MHz ƒ(r) = 28.4 MHz 15 meter ƒ(r) = 21.18 MHz ƒ(r) = 21.05 MHz ƒ(r) = 21.27 MHz 20 meter ƒ(r) = 14.09 MHz ƒ(r) = 14.18 MHz ƒ(r) = 14.35 MHz 40 meter ƒ(r) = 6.98 MHz ƒ(r) = 7.10 MHz ƒ(r) = 7.23 MHz   The data suggests that the higher bands are affected more by ground coupling effects than the lower bands. It is very likely that the absolute value of the measured data reported above are specific to my measurement environment.   Fine Tuning and Characteristics at Final Elevation At this point I am armed with resonant frequencies at the intended elevation and empirical estimates of the relationship between radiating element length changes and resonant frequency shifts. For the 10 and 15 meter bands, the resonant frequencies was at or very close to my target. In addition, the bandwidth is sufficiently broad (observed to be neat that specified by Xiegu) that no adjustment was warranted. However, the 20 and 40 meter band resonant frequencies were off a bit from my target and warranted adjustment – which of course meant the mast with antenna attached needed to come down and back up one more time (no small feat even with help from family members). I used the guidelines established above to make my adjustments (+8 cm on the 20 m band; +21 cm on the 40 m band). Comparison of Measurements at Final Elevation (before and after final adjustment) Band 1st time at elevation 2nd time at elevation 10 meter ƒ(r) = 28.4 MHz ƒ(r) = 28.4 MHz 15 meter ƒ(r) = 21.27 MHz ƒ(r) = 21.26 MHz 20 meter ƒ(r) = 14.35 MHz ƒ(r) = 14.23 MHz 40 meter ƒ(r) = 7.23 MHz ƒ(r) = 7.16 MHz   The 20 meter band adjustment was spot on. The 40 meter band adjustment overshot my target slightly, by about 15 kHz. I made the easy decision that one more small tweak was not worth the substantial effort of bringing the mast + antenna down and then back up again! Key antenna length measurements (after the 2nd (final) adjustment) Band Section Measurement Description Length (cm) Length (inches) 10 meter ƒ(r) = 28.7 MHz 340.4 134 15 meter ƒ(r) = 21.18 MHz 24.1 9 1/2 20 meter ƒ(r) = 14.09 MHz 42.9 16 7/8 40 meter ƒ(r) = 6.98 MHz 181.3 71 3/8   Plots of SWR as a function of frequency from the NanoVNA covering the full range of the United States amateur 40, 20, 15 and 10 meter bands after final adjustment and at final elevation are shown below. Screen shots from an IC-7300 show SWR as a function of frequency measured after final adjustment at final elevation for the portions of the 40, 20, 15, and 10 meter bands that are of particular interest for my intended use of the VG4 are shown below. Resonant Frequency Shift in Wet Conditions Resonant frequency shifts during wet conditions (rain and for some period after) exhibited with antennae in general, and with vertical HF antennas using traps in particular, are known to occur. I had the opportunity to measure the effects of wet conditions on the VG4 shortly after a moderately heavy rain. Comparison of Measurements Under Dry vs Wet conditions (after final adjustment at Final Elevation) Band Dry Wet 10 meter ƒ(r) = 28.4 MHz ƒ(r) = 27.94 MHz 15 meter ƒ(r) = 21.26 MHz ƒ(r) = 20.77 MHz 20 meter ƒ(r) = 14.23 MHz ƒ(r) = 13.96 MHz 40 meter ƒ(r) = 7.16 MHz ƒ(r) = 7.04 MHz The resulting shifts in resonant frequency were not unexpected. The magnitude of the frequency shift, coupled with the shape of the SWR curves, suggests that tuner adjustments are almost certainly warranted on the 40 and 20 meter bands, probably also on the 15 meter band, and less so on the 10 meter band. As expected, the VG4 resonant frequencies returned to almost exactly the previously measured values when conditions dried. Discussion on various radio forums frequently point to moisture ingress to the traps as the primary culprit for SWR shifts in vertical HF antennae. Others hold the view that there are different, broader mechanisms at play (such as changing ground moisture level, for example). In my opinion, the shifts that I observed (shown above) are unlikely due to moisture ingress in the VG4 itself given the new condition and the observed quality of the upper trap seals, the top radiating element cap, and the matching transformer box seal.   Initial Performance on the Air My experience on the air pleasantly matched my expectations. I was able to quickly pick up a few new countries in the first few weeks (snapshot from my QRZ log shown below – all at 100 W from 30 km northwest of Boston, MA). Of course, this provides only a qualitative assessment of VG4 performance, and my other benchmarks are primarily wire antennae. Quantitative comparisons between the VG4 and other antennae could be made using WSPR, for example, and may be one of my future projects. Summary and Final Thoughts I found the VG4 to be of high-quality materials and components that were easily assembled. Tuning was relatively straightforward as described by Xiegu. For my benefit to simplify the tuning process (and possible for the benefit of others), I found the approximate relationship between length adjustments and resonant frequency shift for the following bands to be: 10 meter band: - 100 kHz / cm 20 meter band: - 15 kHz / cm 40 meter band: - 2.4 kHz / cm When it comes to antenna height, it is generally thought higher is better. SWR can certainly be influenced by distance from ground as well as other objects. Xiegu’s recommendation of 3 meter minimum base elevation seems like a reasonable height provided nearby structures are not significantly above that height. In my case, garage and house structures would have distorted the radiation pattern at that minimum elevation so I elected to mount the antenna with a base elevation at 6 meters above grade (2 meters above the roof peak) and took advantage of the building to support the mast. I did not feel the need to further stabilize the antenna with guy wires. Xiegu has a published wind speed rating of 35 m/s (approximately 80 mph). I watched the VG4 closely during a storm with 50 to 60 mph gusts and thought it was quite sturdy. In my opinion, the VG4 is worthy of consideration from a couple of perspectives. The price – performance point makes it a great choice for a first or single HF antenna – a) multi-band (single coax run / no need for antenna switches); and b) relatively small footprint (useful where a tower or long wires are not practical). In my case, I was looking to install a multi-band antenna that also covered 40 meters at a remote location on our property where a single coax run was a major cost constrain. For me, it was a great choice. 73 de W1ENB

Xiegu VG4 antenna is a 4-band GP type and is made of aluminum alloy with anti-oxidation surface. It is light, solid, and easy to install. It is with good outdoor weather ability. After the normal installation without needing extra guying, it can resist Category One Hurricane.

Features:

4-Band Vertical Antenna: The VG4 is a 4-band Ground Plane type antenna made of aluminum alloy with an anti-oxidation coating. It covers 40/20/15/10 meters. The user trims the antenna to the part of the band as needed.

Automatic band switching: The antenna has a single coax cable feed however each band is individually tuned with a low VSWR across the band. Through fine-tuning, the best (rock-bottom) SWR can be achieved on the user’s choice of frequency within the band. The band selection is 100% automatic through the single feed, just switch bands on the radio.

No extra ground peg or radials are needed: The antenna has its own effective counterpoise replacing the need for radial wires.

Physical: This antenna is light, but built to last and is easy to install. Suitable even for homes with only a small space available. It is perfect for roof, patio, small backyard, condo and motorhome installation.

Top loading: Parallel resonators are used to give the best vertical-element efficiency. End loading of the lower HF band sections (capacitive hats) allow efficient operation with a reduced antenna height.

Outdoor weather ability: The VG4 is rated for high wind environments. After a normal installation, it can resist a category one hurricane with no guying required.
 

Specifications:

Use frequency band: 7/14/21/28MHz (40m/20m/15m/10m)
Axial length: about 7.8m | 25.6ft
Radial length: about 2.7m | 8.8ft
Maximum power handling: 1000W PEP (CW500W, RTTY300W)
Antenna impedance: 50Ω
VSWR:<1.5:1
Antenna bandwidth: 40m: 150kHz / 20m: 450kHz / 15m: 800kHz / 10m: 1000kHz
Rated wind speed: 35 m/s
Antenna interface type: SL16-K
Weight: about 7.0kg | 15.4lb
Package size: 13x13x120cm | 0.4x0.4x3.9ft
Erection height: the distance from the ground is more than 3m (10ft)
 

Installation Instruction:


A. Match and plug in the components in order.
B. Secure the components with screws and spanners.
C. Twist the capacitor cap/ the main counterpoises into the corresponding position.
D. Fix the main pole with a U-shaped holding clamp and a fixing plate.
E. Install the matching box.

Note:

1. The antenna can be installed either on a stable ground supported mast or using a wall mount secured using expansion bolts. The installation clearance above the ground should be greater than 3 meters (10ft).
2. The antenna installation environment shall be as open as possible and away from some important equipment & facilities, power transmission & transformation equipment, medical equipment and other sensitive electronic instruments or equipment, and public radio & television tower or other high-power radio transmission antenna system.
3. When mounting on a tall mast or roof please take appropriate measures for lightning protection and grounding.
4. After the antenna test is completed, it is recommended to apply waterproof and UV resistant silicone rubber at the antenna feeder joint, to wrap the whole connection
part.
5. As long as the surrounding environment is safe, it is not required to use any guy ropes.
6. In extreme weather conditions, it is recommended to take down the antenna in advance of the storm arriving if possible.

PS: The VG4 antenna can be adjusted to any band center frequency that you wish. During the configuration step, adjustment of the higher frequency bands will affect all of the lower frequency band settings. The adjustment of lower frequency bands will not however affect the higher frequency band settings. Therefore, the adjustment sequence is, as shown above, to adjust from the 10m band to the 40m band. Generally speaking, only the 40m frequency band will need adjustment.

 

What's in the box?

1 x Main support (450*46*4mm | 1.5*0.15*0.01ft)
6 x Main counterpoise (1200mm | 3.9ft)
1 x Antenna body NO:1 (1200*33*3mm | 3.9*0.1*0.01ft)
1 x Antenna body NO:2 (1200*29.5*26mm | 3.9*0.1*0.08ft)
1 x Antenna body NO:3 (1200*26*23mm | 3.9*0.08*0.1ft)
1 x Antenna body NO:4 (10m Notch filter)
1 x Antenna body NO:5 (245*26*23mm | 0.8*0.08*0.07ft)
1 x Antenna body NO:6 (10m Notch filter)
1 x Antenna body NO:7 (325*26*23mm | 1*0.08*0.07ft)
1 x Antenna body NO:8 (20m Notch filter)
1 x Antenna body NO:9 (1200*12.8*10.5mm | 3.9*0.04*0.03ft)
1 x Antenna body NO:10 (1200*10*8m | 3.9* 0.03*0.03ft)
2 x 20m capacitor cap (500mm | 1.6ft)
4 x 40m capacitor cap (1200mm | 3.9ft)
1 x Matching box
1 x Main support set plate
4 x U clamp
1 x 7# sleeve
1 x 10# wrench
1 x 13# wrench
1 x M4 Allen wrench


1 Year and 6 months
Manufacturer's Warranty.
• Radioddity's limited warranty applies to all BRAND NEW items sold by radioddity.com and other authorized dealers (except Xiegu).
• This warranty is non-transferable and proof of purchase from us or an authorized dealer is required for warranty service.
• For Xiegu items, we provide a 1 year warranty.
 


What Does This Limited Warranty Cover?

We warrant that the Products are free from defects in materials and workmanship under normal use and use in accordance with the respective Product user manual, during the Warranty Period. Please refer to the Instructions inside each package for a description of proper use and care of the unit.


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This limited warranty does not cover damages directly or indirectly arising or resulting from or during:

(1) accident, misuse, abuse, vandalism or acts of God (including lightning and other weather conditions)

(2) use with another product or other damage or loss suffered by the use or combination of any other item

(3) improper or inadequate maintenance

(4) repairs by an unauthorized service technician

(5) normal wear and tear
 

Open Box

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Open Box items come with a 6-month warranty instead of the standard 18 months warranty and are not eligible for any warranty extension offered to new products. We will not accept returns of Open Box items due to cosmetic damage or other non-performance-related issues. All sales of Open Box items are final and not eligible for a return or refund.

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Ship from

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Delivery time

5-7 days
AFTER the handling time

5-7 days
AFTER the handling time


 

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