Ham Radio

Monday, November 16, 2015
40m Delta Loop


I built myself a full wave 40m loop, ordered a 22m fibreglass flagpole and went outside into my back garden. I erected the loop in a delta formation with one end supported by a convenient tree, the other my new flagpole and used a 4:1 balun and coaxial choke to feed the antenna with 50 ohm heavy coax.
I am amazed that the the 40m delta loop works on 80 without any need for an atu with 1.5 swr. Also swr readings of 1.5 and less on 17m, 15m, 12m and 10m. Thats is awsome! I just need the atu to tune 40m and 20m as they are reading swr at around 2.5:3 which I may have a go at improving on when I get chance. So far the 40m Delta Loop is receiving superbly and seems great on transmit with my single calls getting over the pileup on 100 watts quite easily. Its looking promising and I will enjoy testing it out over the winter months.

Homebrew 40m Delta Loop - There will be much more info including build instructions/dimensions and band results on the new 80m - 10m (40m full wave Loop) in my next post, until then very best 73!
posted by Simon Davison @ 12:01 am  
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