G0KSC - Simple to build, High Performance Yagi and Quad Antennas - Home of the LFA Yagi

144MHz LFA Yagis

Low Noise LFA Yagis designed by G0KSC free to build for personal use.

70cms LFA Yagis

Twin-Boom G0KSC Quads

G0KSC Twin-Boom Quads

G0KSC Custom Dish feeds - Above installation @ HB9Q

Custom low-noise dish feeds

G0KSC Custom Dish Feeds

Above installation @ HB9Q

Read Time: 2 - 4 minutes

Over the last few days I have received several photos of antennas built recently from hams all over the World. Below are a few of the photos sent with the comments of those having built them. It looks like we are keeping ourselves busy for the coming summer season!!

PA0VAJ built his SC6-4-6D Dual band 4/6m Yagi. This antenna provides 3 elements on each band

Johan, PE9DX who sent the above picture had these comments:

'PA0VAJ has good result with it, he just build it a little different the elm. are not on the boom but trough the boom, not isolated.The SWR on both bands is ok, on 6 meter it is 1:1.1 with some 2 Mhz bandwidth, on 4 meter SWR is 1:1.2 with some 500 kHz bandwidth. Jan is in JO33hf and hears the English beacon on 4 meter every day with this small antenne, the LX and ON beacon on 6 meter also are in every day. Greetings Johan, PE9DX.'

The VK3VG 2 x 11el 2m Plus2 LFA array

Trevor, VK3VG had these comments on his new array:

'Hi Justin, Just to let you know I now have 2 of the 11el plus2 yagis running and they are great, good gain, front to back and low side lobes, quite impressed. Thanks for your help. 73 Trevor VK3VG'

The W4TMW 28 element 70cms LFA

Tom built this antenna from scratch making everything including machining each and every insulator. Tom saw the following reflected power levels from his LFA when installed:

Here are my readings:

Freq. Ref Fwd

432.500 .5 20.75

.400 .25 19.75

.300 .04 19.0

.200 .03 18.5

.100 .04 18.0

.000 .06 17.5

Tom has not had a chance to really test the antenna but F/B tests on some beacons and repeaters so far looks encouraging.

Tom had these comments: 'So far I'm very pleased with your antenna....good job!'

The 2 x 14el 2M LFA array of F1USF

Fabrice, F1USF had this to say about his new 2 x 14el 2M LFA array:

'HELLO JUSTIN, l just made a photo from my portable station , but it s not easy ,bad light conditions, and bad camera too , but for me it s was more important to compare the 14 ele to my 2*16 same long boom and after a day of tests it seems to be the same reception to half S meter point , so it s a good system swr is right 1.05, my 16 ele are a little beat noisy in a particular direction about 2 S meter point , like you can see the motorhome roof is about 1m of the lowest antenna and no particular effect with doing a 360 turn, l will try a second test when wx conditions will be better at 1500 asl certainly the next month with a longer mast but its not easy alone to install the system, tks for all l will try a six meter too as soon as possible , and try to send us a long 70cm too more than 38 ele if possible'

Fabrice, F1USF

The 22el 70cms LFA in use at M0GMG/P

'Hi Justin

Attached are a couple of photographs of the aerial that I made to your calculations. It was built to use portable in the RSGB UKAC evenings and had its first outing this week. I am most pleased with it. For reference the SWR is nearly flat at 1:1.4 or lower across most of the 70cm band.

The aerial was built to split into two for transport but in fact fits onto the roof rack in one piece.

Thanks for publishing the plans etc, it encouraged me to have a go. 2M band next and maybe a bit bigger.'

Roger, M0GMG

If you have built a G0KSC antenna, let me know, send photos and and be sure to tell others about it!

73 Justin G0KSC

Help keep the G0KSC website Online