RX antenna : Homemade half size K9AY loop for 80/40m

Hi all,

I may not wait next winter for a good RX antenna...So I put down my EWE last WE, and I'm thinking of building a half-size K9AY antenna.
A lot of litterature is available on Internet for the original one, but 7.5m high and 10m wide is too big for me.
As this original size is designed for both 160 and 80m, I tried a few simulations to cut its dimensions by 2, given the fact that I'm not active on 160m...

I made a few simulations on both MMANA and 4NEC2 to find the best trade-of between over-all performances, size and resistor values (I'll be posting them soon !)

The K9AY relay box is already made, and in the shack, I've already included the relay control inside my preamp + preselector box.

Here are what I made for further illustration...Of course, highly infuences by the original article from K9AY himslef, and from ON4UN Low-band "bible", HI





Ronan

Comments

[Sietse]

Hello Ronan,

Found your website. Intereresting on the half zize K9AY, I only have a small plot so this would just fit. I have the Array Solutions K9AY controller, and would like to try to get a half size K9AY system working, so I can try to DX on 80/40/30 this winter. Do you have any suggestions or experiences with your system which could help me, building and optimising my loop?
Bert 73's,

Sietse (PA4XA)

[Clark]

Hey,
Thanks! Great post you have written on "Wireless modem connection simplified by E. Lorete". Really I can say that your post is very informative, I'll come across your blog again when you will
update it with new.

Thanks,

Clark
http://www.mobilemark.com/

[Fabien, TK5MH]

Salut Ronan !
Je lis avec plaisir votre blog de temps en temps. J'attends avec impatience vos resultats avec la K9AY 1/2 size. J'ai changé de QTH depuis peu et je reconstruis la station.Je dispose également de peu de place et il me faut améliorer mes conditions RX en low bands... Au plaisir de vous lire et de partager nos centres d'intérêts communs.
Amitiés depuis les environs d'Ajaccio
Fabien, TK5MH

[F8AFC]

Salut Fabien,
Merci du commentaire..Et oui, quand on a peu de place, il faut de l'imagination, HI
Promis, dès qu'il arrête de pleuvoir, je la monte (tout est prêt, y'a plus qu'à !!!!!!).  La K9AY "half size" correepond bien à mon QTH, la boite de relais est finie, j'ai même mis les piquets
de terre....J'ai hâte de la monter, même si la saison "bandes basses" touche à sa fin...Mais bon, elle servira pour la saison prochaine !!!!
73, et peut-être à un de ces jours sur l'air !
Ronan, F8AFC