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[POLL] Chaser DX antenna type for 17-20-30m


#1

Dear chasers,

In the thread “Tips and Strategies for more DX in SOTA Logs?” I recommended the use of 20m to work DX when activating because I believe there are a greater number of chasers having a beam antenna for 20m compared to those having it for 17m and 30m.

I’d ask you, SOTA chasers, to vote the following 3 polls saying which type is the best performing for DX antenna you have for chasing from your base QTH.

Please, do not vote about the antenna you are using for chasing from a SOTA summit.
These polls are only aimed to find out about chasers base station antennas.

For 30m band:

  • Beam
  • Wire (dipole, enfed, loop, etc)
  • Vertical GP

0 voters

For 20m band:

  • Beam
  • Wire (dipole, endfed, loop, etc)
  • Vertical GP

0 voters

For 17m band:

  • Beam
  • Wire (dipole, endfed, loop, etc)
  • Vertical GP

0 voters

Thanks for your votes.

73,

Guru


#2

One (slightly flippant) comment Guru. For me the best antenna for chasing from home is the only one I’ve got - a long wire. I wish my wife would let me have a beam! :cry:


#3

Hi Andy,
Thanks for your vote.
Yeah, I think most of us wish our wives would let us have a beam…
I bought my tribander yagi+tower+rotator, etc when I was still single and thanks to that I can have a beam in my owned house, despite several frictions with my xyl from time to time.
But we moved to a rental appartment in town last summer and I don’t have any good perspectives about installing a beam in the appartment, so I live with a random wire endfed in the balcony. That’s why I voted wire and beam for 20m band, because I sometimes chase from my owned house with the beam I still keep there, but most of the times now I do chase from the appartment with the endfed random wire.
This poll is resulting highly interesting to me and I’d like as many chasers voting as possible, in order to have a more accurate result with less error margin.
However, we can already see what I was guessing of much greater number of chasers having a beam for 20m compared to those having it for either 17 or 30m.
Best 73,

Guru


#4

Hi Guru, I use whatever antenna that gives me the best SNR. I am lucky to have an Ultrabeam (a dynamic antenna like the stepir that is a folded dipole on 40&30m and 2 elements all bands 20-6m), a Gap Titan vertical (all bands 80-10m), an 80m OCF (all bands 80-6m with tuner for WARC and 15m) and a 40m dipole, so pretty much have HFcovered. Like many though I do at times suffer from extremely strong powerline QRM and other interference from living in town - not much to be done about that short of cutting down power lines though!

Matt
VK1MA


#5

Slighty off topic but given the number of antennas you have, have you considered a phasing unit perhaps using an antenna not meant for the band you are on and your main antenna. The non-resonant antenna will pick up the powerline QRM and you can then phase that with the other antenna to reduce the QRM.

73 Ed.


#6

on 30 + 40m my DJ2UT - Beam is a rotary dipole
73, cu on SOTA de Mike, dj5av


#7

Hi Ed, yes I have considered a phasing unit, but they are a rather expensive gamble on the off chance that it may fix the problem. Noise levels vary significantly and presently not bad depending on band/time of the day, so not too bothered presently.

Matt
VK1MA


#8

My main Sota chasing antenna is 40m full wave loop Hoz H/B
and also 6 EL 2m h/b.
And yet to get one on 6m sota that is via 3 el moxon h/b or the loop

M3FEH


#9

A DIY unit made from assorted coils, toroids and tuning caps + a tx/rx relay are not going to cost very much even bought new.


#10

I agree with Andy, there are plenty of circuits to build your own but if you want one ready built Here’s the one I bought built up from RA0SMS for €61 (US$75)


#11

Has anyone here tested such QRM Eliminator and explain his/her own experience. Would it be, for instance, able to eliminate from my receiver the QRM produced by the LED lamps in my neighbour house or that produced by some of those phones battery chargers or the vitroceramic kitchen?
I’d immediately order a couple of them in case someone can say it works for such type of QRM.
Thanks.
73,

Guru


#12

There’s no gaurentees Guru, which is why it’s probably an interesting project to build one. There have been articles on them in “Funk Amateur” and other radio magazines.

The principal of phasing signals from two aerials to remove QRM (note QRM, not QRN) has been around for many, many years.

Whether it will work in your specific case Guru, no one can say. By the way, I believe it’s not the LED lights themselves that cause the noise but rather the switched mode power supplies they run off. Have you tried running your gear off a battery in case the noise from your neighbour is actually coming up the mains leads - if so a Mains filter should stop that.

73 Ed.


#13

Hi Ed,
I think I recall having seen on the web some not very positive comments about these gadgets, however, it’s price is affordable, as I have seen you can even buy it as a kit for just 30€, and this makes it indeed an interesting project for trying one out, experimenting with it and seeing what it can finally achieve.
What I’ve read is they can cancel QRM coming from a single source, although it’s not possible for it cancelling multi sources QRM. The QRM produced by the battery chargers, the vitroceramic kitchen and the LED lamps of my neighbour are not coming up the mains leads, so I have the impression this gadget will be able to cancel it.
But I’d really like to hear from someone’s direct experience.
I might order one just to see how it does and I’d let you all know my findings, but it looks like they have run out of stock right now.
We’ll see if they produce more units soon.
Best 73,

Guru


#14

I emailed Anton RA0SMS and he told me he’s awaiting some components and expecting to have them by next week. He’ll let me know and I think I’ll order one or two to get rid of some of those Switching Power Supplies QRM.
I’ll keep you informed.
73,

Guru


#15

Thank you very much for your votes.
I found it very interesting and I got even surprised with a 14% out of 48 voting chasers having a beam for 30m. I didn’t expect this much.
The results for 20m met my expectations with a 45% out of 51 voting chasers having a beam. This is why I recommend 20m as the best band to try SOTA DX, simply because having so many beams around in the “Ocean of chasers” give the activator better chances to be heard and chased by a DX chaser.
The results for the 17m band are also nearly meeting my expectations with a 32% out of 55 voting chasers having a beam.
There must be many more chasers there who have not voted yet. If you feel like doing it and contributing to build these basic statistics, don’t wait and do it now.
Thank you.
Best 73,

Guru