ANTENTOP- 01- 2018 # 022

Broadband 50- MHz Antenna

I used an automotive epoxy that I have bought in Canadian Tire shop several years ago. It was weather and electrical proof one as I remembered but I lost label from the epoxy and cannot tell the type of it. RF choke was formed by five ferrite rings that fit the cable by inner diameter. I bought the ferrites at one of Ham-fest several years ago and I do not know what type is it. However it is possible use almost any type of ferrite rings to make an RF choke on the coaxial cable.

Photo 1 Cuplug

Photo 3 Ready Central insulator

Yes, I almost forgot about coaxial cable. It is one of main part of any antenna system. It is perfect if you have a roll of good coaxial cable that you may use for your antenna. But I am not. I have just several lengths of coaxial cables that I have bought at ham flea market. At some visual checking some of the cables went to my garbage bin. Others were checked with help of MFJ-259B and 50- Ohm Dummy Load (Huber + Suhner, 50- Ohm, 25- Watt, 0- 2 GHz, was bought by me at e-bay for some small money). Figure 5 shows the schematic of the test.

Photo 4 Huber + Suhner, 50- Ohm, 25 – Watt, 0- 2 GH Dummy Load

Photo 2 Cuplug before filling with epoxy

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