50MHz

All posts tagged 50MHz

After over nine years with the DK7ZB 4-Element-28-Ohm-OWA-Yagi with 2,20m-Boom I decided to do an upgrade. During about 7 hours work on August 19, 2016 I dismantled the old 2,2m boomer, recycled a lot of its parts and build a new DK7ZB 6-Element-50-Ohm-Yagi with 6,00m-Boom

Here are some pictures:

08:00 hour, boom lift in place.

08:00 hour, boom lift in place.

Working on the new 6-meter boom, old 2,2-meter on the floor.

Working on the new 6-meter boom, old 2,2-meter on the floor.

Populating elements.

Populating elements.

Antenna recipe :-)

Antenna recipe 🙂

Radiator is from the old antenna, but as this is a 50-ohm antenna the old DK7ZB match is replaced with a choke. Here I have 4 ½ turns, ID approx. 50mm. I threw in some surplus ferrite beads to, but I don’t know if they will do any good.

Radiator is from the old antenna, but as this is a 50-ohm antenna the old DK7ZB match is replaced with a choke. Here I have 4 ½ turns, ID approx. 50mm. I threw in some surplus ferrite beads to, but I don’t know if they will do any good.

Preliminary test to check if everything seems sane. MFJ-meter is happy.

Preliminary test to check if everything seems sane. MFJ-meter is happy.

Antenna in place, about 2 meters below the HF-yagi. Not a perfect location, but it is the best I can do for the time being.

Antenna in place, about 2 meters below the HF-yagi. Not a perfect location, but it is the best I can do for the time being.

VNA-check & the operator is happy with the results. Next is real on the air performance tests.

VNA-check & the operator is happy with the results.
Next is real on the air performance tests.