3 Element 50MHz Long Yagi by ON6MU
VHF Optimized Yagi Antenna for the 6-meterband (50 Mhz) RE-A50Y3.
http://users.belgacom.net/hamradio/schemas/50mhz3el_yagi.htm
 

3 Element Yagi Beam 50MHz by MØDAD
The antenna has a forward gain of about 6-7dBd. It does not look out of place when on the mast. It could even be installed in the attic as the turning radius is quite small.
http://www.delboyonline.co.uk/m0dad/Homebrew/3_element_beam__50_mhz.htm

50MHz High Gain Antenna by ZS2FM
An efficient antenna system is a prerequisite for more successful six metre operation. Most amateurs start off with a four element yagi, which is more than suitable for F2 propagation when signals are very strong.
http://www.qsl.net/zr6dxb/PROJECTS/ZS2FM/zs2fmantamp.htm

50MHz Moxon Rectangle by N3OX
The FT-857 is the first radio that I've owned with 6m capability, and so I needed a 50MHz antenna. The HF wire works in a pinch, but what I really wanted was a beam.
http://www.n3ox.net/projects/sixmoxon/

6 Meter 5/8 EDZ Signal Squirter by N4UJWhttp://www.hamuniverse.com/6meteredz.html

6 Meter Moxon by N1RIK
I decided to build a PVC "U" frame out of 1/2" PVC. I opted out of using an apoxy to hold the pvc together, and used a thin wrap of duct tape to put on the ends of the pvc sections to twist into the pvc elbows and T connectors for a tight fit.
http://www.moxonantennaproject.com/n1rik/n1rik.htm

6 Meter Moxon by WAØWOX
Built around a 1/2" pvc frame, Larry's 6 meter moxon antenna is made from #8 aluminum ground wire available from Radio Shack. Larry's motivation in considering the moxon design was to deal with very strong rfi ...
http://www.moxonantennaproject.com/wa0wox/wa0wox.htm

6m/2m/70cm Yagi Antenna Built from Old TV Antenna by KGØZZ
This turned out to be a great little antenna. It works the 6 meter, 2 meter and 70 centimeter bands. You can use one common feedpoint or two seperate feedpoints depending on how you would like to connect this antenna to your transceiver.
http://www.amateurradio.bz/tri-band_yagi.html

A four element antenna for the 50 MHz Amateur Radio Band by DF9CY
After working three years with a homemade DL6WU type 6-element-antenna, I was intended to build something new as the old antenna decided to fall apart. So I came to this one. After some calculations I came to a 4 element yagi.
http://www.df9cy.de/tech-mat/fourfour.htm

A portable three element 6M yagi for less than twenty pounds! by PA3HBB/GØBZF
Having just got myself a new Alinco DX-70 at Friedrichshafen, I required a simple beam antenna for the coming summer. So I looked at the criteria I needed...
http://www.qsl.net/pa3hbb/6m3e1.htm

A Six element antenna for the 50 MHz Amateur Radio Band / Version 4 by DF9CY
I have mounted the 6 Element antenna about 2 meters above my 3 element antenna for 28 MHz. (The 28 MHz antenna is a well performing "EZNEC redesigned" CB radio antenna)
http://www.df9cy.de/tech-mat/cy6ele50.htm

An alternative to the M2 6M7JHV antenna for 6m by G3WOS
The M2 6M7JHV is a 7-element high performance antenna that is used by many 6m (50MHz) DXers around the world for terrestrial and EME QSOs.
http://www.gare.co.uk/6m_antenna/

Antenne 3 éléments pour le 50 Mhz de F6FEO
Il s'agit de remplacer mon ancienne Jungle Job, par un modèle ayant plus de gain, sans présenter trop de prise au vent. Mon choix s'est porté sur une beam 3 éléments décrite sur le site de DK7ZB.
http://f6feo.homebuilder.free.fr/aerien_50Mhz.html

Construction Details for 50MHz-Yagis in DK7ZB-Design
The 50MHz-Yagis are designed with an impedance of 12.5Ohm or 28Ohm. The 12.5-Ohm-Yagis are designed with small bandwidth (300KHz) at highest possible gain and must be mounted in a clear surrounding.
http://www.qsl.net/dk7zb/6m/details.htm

De BBC Quad door PA3FKM
Om toch maar weer eens op 6 Meter QRV te kunnen zijn heb ik eens wat met antenne's geexpirimenteerd.
Toen adviseerde Paul PE1BBC mij om eens een wiebertje te proberen. Een quad is simpel te maken, en redelijk breedbandig (lees niet kritisch).
http://pascal.nedlinux.nl/zelfbouw/BBC-Quad.html

Six Meter Moxon Antenna by N2MH
This is a picture of the whole antenna on the ground in my driveway. The driven element is in front and the reflector is in the rear.The dimensions are approximately 29 inches deep by just under 7 feet long.
http://www.moxonantennaproject.com/n2mh/n2mh.htm

VHF/UHF X-Beam by KØEMT
I sat down and drew out what I did and thought I'd pass on what I did/found out. The design is from The 1993 ARRL handbook that was given to me by wd0hbx. The x-beam was originally intended as an HF mono-band beam. I used the formulas to build it for 6m. It also happens to work out really well for 2m & 70cm use as well.
http://www.delboyonline.co.uk/m0dad/Homebrew/vk2abq_beam_50_mhz.htm

VK2ABQ Beam 50MHz by MØDAD
The VK2ABQ is an easy beam antenna to build. I built one for portable use for the 6m band, you can see the details in the above diagram. The antenna is a two element yagi made with wire and the element legs bent back to reduce the size. This also makes it a popular antenna for 28,21 and 14MHz.
http://www.delboyonline.co.uk/m0dad/Homebrew/vk2abq_beam_50_mhz.htm

ZX 6-7 Yagi Antenna for 50 MHz by DF9CY
With a little additional material you are able to extend the ZX-Yagi 6 Elements for 50 MHz by about 2 meters. The gain rises about 0,8 dB.
http://www.df9cy.de/tech-mat/zx-6-7_cy/zx6-7.htm