ZX-Yagi 5 element (ZX-5ITB)

  Years ago Ron Eberson had a small antenna manufacturing company ZX-yagi producing very good quality antennas. Especialy in the 11m community it was a well known brand. At least around the ninetees of last century. It appears the company is still there since WIMO Germany has the antennas still for sale. According to this website http://www.zx-yagi.com/. I wonder if Rob is still constructing them when one is ordered? 

Anyway, a well known 11m yagi was the ZX-5ITB, a kind of short 5 element  yagi. I found one on the internet for sale about 22 years ago.  At that time I had big plans for towers and big antennas. I could get it for a nice price and aquired the antenna which was way too big for my tower at that moment. The guy that sold it to me told me it was a 5ITB converted to 10m. Well, I never had this antenna into the tower, it was stored in my garage while other antennas got into the tower. I now thought it was finally time to see if the antenna was still complete and take a measure with an analyzer to see what part of the 10m band it was tuned for.

At first I found a construction manual for the 5ITB but unfortunately it was incomplete. I decided to just put everything together since everything was color coded and pre-drilled. It went well and SWR measurement followed.

These are quite old designs (ON4UN), very populair at the end of last century. Radials mounted directly not isolated from the boom and a large gamma-match which is essentially a large capacitor.

Looks like the antenna is indeed tuned for 10m, probabely the CW part. Not sure because this can shift when the antenne is high into a tower.

I now know everything is in working order. Had to store it in the garage again of course so had to dismantle everything. The antenna is for sale. Not shipping it. €150. If interested write me an e-mail. You can find the e-mail address via QRZ.com.

If anyone knows the correct measures for the ZX-5ITB ? Please let me know...

Update 5-October-2024: Antenna is sold to PD7DD Willem.