The Folded Dipole On Ground is an excellent, low noise, receive only antenna that works just like our popular Loop On Ground but is ideal for long, narrow gardens. Starting at just 30, long and just 4" wide, the FDOG can easily fit along a fence or boundary line without getting in the way.
The FDOG is based on the same principles as the excellent Loop On Ground design by KK5JY (http://www.kk5jy.net/LoG/) which totally transformed the receive side of my station. The S9+10dB of noise on 80 meters vanished and was replaced by cleaner signals with an SNR improvement of between 3 to 6dB.
The FDOG is a made up from a 30' x 4" narrow rectangle of wire laid on the ground, fed via an isolated ferrite transformer and connected to a receiver with coax cable. I've used both the 50 ohm and 75 ohm version but can't detect any difference so you can choose which version is best for your needs. I've also found that the 60' version works well on 30 meters and up and a larger version made from a 100' long element works better for me on the lower bands like 40, 60, 80 and 160 meters.
The core is a genuine Fair-Rite wound with easy solder enamelled copper wire and a custom turn ratio that produced the best results after 6 months of testing . The enclosure is a genuine high quality Hammond with 2 flanges to allow pegging down. All the nuts and bolts are marine grade A4 Stainless Steel with wing nuts for the element connection to allow an easy install and quality coax connectors are used on both versions. The enclosure is pre drilled so it's a very easy kit to build with simple hand tools and a soldering iron. Please see the full build guide located here: https://www.omni-rf.com/fdog-setup
Once installed, I suggest a wrap of self amalgamating tape around the coax connector and a smear of Vaseline on the element connections to keep them corrosion free.
You can choose between two different versions which have different transformers based on the desired output impedance:
- 50 ohm (supplied with a BNC connector to use with common 50 ohm coax like RG58)
- 75 ohm (supplied with an F Type connector to use with 75 ohm satellite TV coax like CT100 )
You can also choose between several different element options:
- No element (transformer only and supplied with 2 x 4.3mm insulated crimp terminals and 2 lengths of glue lined heat shrink ready for you to terminate your own element)
- 60' "Omni Flex" element made from 0.75mm pure copper with black insulation and 4" element spacers - This will create a 30' long FDOG, is marked at 15' intervals with heat shrink for easy installation and supplied with pre terminated 4.3mm insulated crimps, soldered and protected with glue lined heat shrink
- 100' "Omni Flex" element made from 0.75mm pure copper with black insulation and 6" element spacers - This will create a 50' long FDOG which is better for the low bands, marked at 25' intervals with heat shrink for easy installation and supplied with pre terminated 4.3mm insulated crimps, soldered and protected with glue lined heat shrink
I also include 5 Galvanised Steel ground pegs with each element so you have everything you need to install the element on soft ground.
This product is a kit which is also available with a build service. Please select the pre-built option if required and note that they are built to order and may take between 1-3 days extra to process your order.
Please note that all of my products are handmade in my own workshop and may be subject to slight manufacturing variations.
Antennas | |
On Ground |
Folded Dipole On Ground
- Brand: Omni RF
- Product Code: FDOG-V1
- Availability: 20
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£25.00
Available Options
Tags: Receive Antenna, Dipole On Ground, Folded Dipole On Ground, FDOG, F-DOG, OGA