Vertical for 160m/80m

Category: Projects

Last Updated: 04 March 2020

Written by Henk Remijn Hits: 783

When we moved to this house I did manage to get a wire in a tree to support a 160 invL. Vertical part approx. 15m, rest sloping to the West.
For 80m I started using a HF6V.

Now the plan is to cut the trees because they are getting to high, so I started looking at other options.

I have some 18m fiber poles available. Mine are unbranded, but Spiderbeam sells them as well.
(www.spiderbeam.de).

I also studied the website of DJ0IP (www.dj0ip.de) which describe all kind of options of vertical antennas with fiber poles.

I made a mount to fix the pole, so the bottom could not move and started erecting the pole with a wire of 22m long connected to it and an invL for 160m. Vertical part 15m. I made temporary guy wires and used trees around the garden for support.

The pole was bending over in the direction of the invL. To check what the effect would be of no side load I removed the 160m. Now the pole is sturdier.

The pole survived gusts of over 40 knots, although the top is swinging a lot.

On the topband mail list I asked people for their experiences.

A summary:

TXBPF set 1

Category: Projects

Last Updated: 06 March 2013

Written by Henk Remijn Hits: 7561

TXBPF 5B4AGN

Category: Projects

Last Updated: 04 March 2020

Written by Henk Remijn Hits: 8869

I am active as operator at the club station PI4Z and we wanted to take part as a multi single in the major HF contest of the year. To get a high score it is necessary to have a mulitplier station active on another band then the running station. To protect the receivers it is necessary to have good band pass filters.

I already have an ICE419B so I needed another filter.

I started to look at options to purchase or build these.

I compared several commercial bandpass filters until I found that Bob 5B4AGN has made a design and has organized a group buy for a bandpass filter with builtin BCD band decoder and relay drivers.

The total price of €450 was low compared to the commercial available band passfilters, some of them costs twice that amount. I had to assemble myself of course but if you like building equipment this is an advantage.

The TXbpf like the ICE419 and the 5B4AGN TXBPF have a maximum power rating of 100W, they are used between the transceiver and the amplifier.

Link to the website of Bob 5B4AGN.

In February 2013 another amateur asked me to built the filters.

Link to pictures and measurement data of filter 2.

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