Antennas

HF /portable

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My recent “toy” for working the HF-bands portably, is the I-Pro Traveller. This antenna is a centre fed half-wave vertical dipole with capacity hat end loading… for details see the description in the link above. The antenna arrived just two days after ordering at wimo.de… great service, btw.

First to say, the quality of the antenna parts is really great. It seems, that this portable antenna will endure many, many times of re assembling and I’m looking forward to having a lot of fun with it for a long time.

But now to the first results… these are the facts, you really want to read, I think. 😉 Yesterday, in the late afternoon was the first time, I drove to a nice place in the surroundings of my hometown to errect the I-Pro. After measuring all the different bands with my analyzer, I got a good feeling, how to tune the antenna in a fast and proper way. BTW… now after the second day of use, I’m able to tune the antenna without my analyzer, only just with the built-in SWR of my TS-480.

So… ready, steady, go!
Quite after powering on my TRX and turning the knob over the 17m band, I made my very first contact with AA3GZ. Doing HF out in nature is really comfortable… no QRM at all, no NR or DNL necessary… it’s really a charm working there. And so it’s time to change to 15m… will this also work? Of course, it works! My next contact was with FR4QT (Reunion Island). But next, I was curios to see, how 40m works. I wasn’t really sure, if I should also buy the 40m extension. I was afraid, this would be a waste of money… 40m with a 3,5m high antenna?!? Can this really work? But although, I made no DX contact this evening on 40m, I had a QSO with PD0CQ, and was really happy, as he gives me real 5/9+10.

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Because of the good performance last evening, I was really keen on working with the antenna in the morning hours. And so I went out in the fields this morning… 3°C, foggy… really wet and cold… Bähh! But my efforts were rewarded with great QSOs to new destinations, I never reached before. And so, Japan went into my logbook with two beautiful connections. The signals were so good, that even a little smalltalk was possible. But the very best of todays portable-work was a QSO with V6Z, a dx-pedition in micronesia.

UPDATE:
Today I was able to work ZL with 5/7 on first call. 🙂

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Conclusion… if you’re looking for a portable antenna with good DX performance, which is easy and fast to errect without help of another person, the I-Pro Traveller is really worth to think about.

 

HF @ home

To work 20m / 17m / 15m, I built a fan-dipole for this three bands:balun

This summer, I rebuilt my fan-dipole and added support for 40 and 10m
Results from analyzer:

 

VHF/UHF @ home

My antenna for 2/70 is a Diamond X-50:img_3464

 

4 thoughts on “Antennas”

    1. Hallo Christian!
      Nein, habe ich nicht, da ich den Dipol mit 1:1 Balun betreibe.
      Aber danke für den Tipp! Versuch macht kluch… wie man ja sagt. 😉
      73 de Andreas

    1. Hallo Hans-Werner!

      Danke für Dein Feedback…
      Leider kann ich Dir die Frage so nicht beantworten.
      Meine Vorgehensweise war so:
      Ich hab mir die Dipol-Gesamtlängen mit der bekannten Formel 142/f (in MHz) berechnet.
      Dann hab ich auf jeder Seite jeweils ca. 20cm dazugegeben und das Ganze dann mit dem Analyzer vom tiefsten Band beginnend abgestimmt.
      Hierzu hab ich die Drahtenden umgeschlagen und mit Kabelbinder eng anliegend zurückgebunden.
      Leider habe ich die Naturmaße nach erfolgter Abstimmung nicht ermittelt, da mein Dipol allerdings nicht gestreckt, sondern als Winkeldipol aufgebaut ist, würden Dir absolute Längen zum Nachbau ohnehin nicht weiterhelfen,
      da diese beim gestreckten Dipol sicherlich differieren würden.

      vy 73 de Andreas

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