My homebrew coax QFH antenna

Photo was taken before some corrections were made to antenna, big and small loops were not in clock wise direction from top to bottom (actually one of the loop was in opposite direction & produced very noisy image). Due to simplicity of design loop correction was done in few min.



Visit the authors page to see details of antenna. http://www.m0nde.co.uk/CVLQFA.htm
Modified QFH by G4ILO http://www.g4ilo.com/qfh.html

16 comments:

Percy said...

Dear Mahesh

You are one Ham who practices what he Preaches - Help All Mankind !!

Truly great and transparent person to give all details of your setup, so lacking in many today.

More Power to you dear friend

73 - Percy vu2ple

Anonymous said...

wow...that's an impressive setup and all "handmade" too. great JOB!!

Robert LZ/G4YRZ said...

Nice Site Mahesh.Hope to see your article in GEO magazine.
Best Wishes from Bulgaria
Rob LZ/G4YRZ

Rob LZ/G4YRZ said...

Nice site Mahesh with some good images. Hope to see your article in GEO magazine.
Best Wishes from Bulgaria.
Rob LZ/G4YRZ

Robert Firth said...

So, is this only a weather facsimile (WEFAX) receiver, or does it receive more than that? Do you get all GOES channels?

Very nice :)

ASHOK said...

gr8 work mahesh
73
vu3nas
vu3nku
vu3nxs

Ádám said...

Can I use it in Europe?

Ádám said...

Can I use it in Europe?

Andy @ University of Gloucetershire said...

Hi very good site thanks for sharing your expirience it's got me to have a go at building a QFH anttena.

Regards

Andy

PCTHAKKAR said...

mahesh,

impressive work...kudos to you for working out all that you did...

a true HAM spirit on display here...

thanks for making India Proud...

73s paresh...vu2pct

Anonymous said...

Hey Mahesh,

This is really very nice work. Kudos to you !!!

73
Parin (VU2PIC)

Anonymous said...

nice job

George said...

Nice work, de George (M1GEO), London, UK.

M said...

Hello, I made it but I get a very weak signal, not enough to get an image. I am using 12 meters of an excellent coaxial with a very little loss of signal (Andrew CNT-400) and original Andrew N connectors. Maybe it will be get a good signal if I put it higher? (Actual height is 2 meters from ground, nearest bulding is about 6 meters tall and about 6 meters away). Thanks. Regards. Marcelo. M6BGG. LW3EOV

M said...

Hello, I made it but I get a very weak signal, not enough to get an image. I am using 12 meters of an excellent coaxial with a very little loss of signal (Andrew CNT-400) and original Andrew N connectors. Maybe it will be get a good signal if I put it higher? (Actual height is 2 meters from ground, nearest bulding is about 6 meters tall and about 6 meters away). Thanks. Regards. Marcelo. M6BGG. LW3EOV

Anonymous said...

All QFH loops must be anticlock when viewed from TOP! You have two anticlock and two clockwise. The signal will cancel out and not be available to RX. Try make them all same direction (anticlockwise)and you will see a world of difference in signal strength!
73
ZS6BOU