Wow, WOW, yet so much junk!

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Wow, WOW, yet so much junk!

Postby jmz01 » Fri Mar 15, 2019 6:57 pm

Today we made antennas for our little Tecsuns as per m0lsx suggestions, crocodile clips, 3.5 mm jack and loads of wire.

We made a few 10 metre and a 20 metre, some with clips and one with a jack for the PL-600 and stretch them out in the garden from tree, to swing to barns


Good grief, we pulled in stuff from everywhere, an amazing variety of commercial type broadcasts in all languages. Some distant amateur broadcasts, some really clear on 14 mhz (particularly 14235 khz) where we collected call signs from Germany, Ireland, Italy, Denmark, kazakhstan, the North of Ireland, Spain, Italy and the Canary Islands.

Unfortunately in the 10 & 11 metre bands all we got seemed to be people playing music, not even good music.
Yet when I used the Tecsun extension antenna (AN07) I did get a few local truckers and some DXers in the Czech republic, or Slovakia..... tricky languages to define.

Had to call it a day when our hands started to freeze, but great for a first try.
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Re: Wow, WOW, yet so much junk!

Postby m0lsx » Fri Mar 15, 2019 11:31 pm

A short wire that does not overload a portable radio has a lot more to offer than many people realise. I just hang my wire around the room & it works wonders.
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Re: Wow, WOW, yet so much junk!

Postby jmz01 » Sat Mar 16, 2019 12:23 am

m0lsx wrote:A short wire ... / ... works wonders.


yes the shorter wire antenna that came with the Tecsuns works very well.

Today was part of my daughters' home-schooling project, making different length antennas and observing the difference. Noting, recording & researching the countries & languages we heard from.

Such a shame the amount of rubbish we came across on CB & Amateur frequencies between 26 & 30 mhz.
But then here it is so simple to buy a high powered multi-band transceiver, for £900 you can get a 200/400w powered Ranger:
http://konektor5000.pl/index.php?p638,ranger-69ffc4-69ffb4-export-200-400-watt-najmocniejszy
and there are many cheaper high powered alternatives; £200 for a 60w Anytone AT-6666 V2:
http://konektor5000.pl/index.php?p1344,anytone-at-6666-v2-densei-ec-2002-tuning-konektor-am-fm-ssb-60w-export

so wannabee DJs can get on the air without a problem, as there is very little policing of anything here and less so in Slovakia, Ukraine, Hungary.

I think another experiment sometime down the line will have to be directional, we have a very odd old horizontal TV antenna that was once adapted for radio broadband in the village before the landline/dsl cabling got updated.

One of my girls is so fascinated that I think she may enroll with the local amateur radio club, she speaks Polish so that won't be a problem. Her uncle is a pilot at the local glider club and I think he has licences for various radio systems too, but not sure what.

All in all though a good start with our 2 little receivers and an ancient scanner, and so wonderful that my daughters are getting the bug.
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Re: Wow, WOW, yet so much junk!

Postby m0lsx » Sat Mar 16, 2019 9:28 am

jmz01 wrote: I think another experiment sometime down the line will have to be directional, we have a very odd old horizontal TV antenna that was once adapted for radio broadband in the village before the landline/dsl cabling got updated.


You would be much better off with a small loop Medium Wave antenna. A TV antenna will not work at all well on shortwave.
I have a small cheap Tecsun AN-200 loop as well as a larger home built RX loop. Avoid anything amplified, as there is no need at all for amplification. Nor is there any need for a physical connection between the radio & the loop. It takes a few minutes to find the sweet spot, where the radio links to the antenna best. But all you need to do is lay the radio down & then place the loop beside it & rotating the loop normally, although sometimes the loop does need to be on standing on the radio. But inductance, gets great results.
My large shortwave loop is so big that my old Russian Vega radio sits on one side of the cross bar & then rotates with the loop. As Charlie Wolfe said of the Anorak UK loop. It sucks in signals like a Tasmanian Devil with a hoover.

I found this image of a Tecsun AN-200 online.

Image

My loop frame antenna is bigger than this. But it will give you some idea of how simple they are.

http://www.irish-pirate-radio-recordings.host-ed.me/loop-antenna.shtml

Also have a look at..

http://www.angelfire.com/mb/amandx/loop.html

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Re: Wow, WOW, yet so much junk!

Postby radiostationx » Sat Mar 16, 2019 2:24 pm

Wonderfully made loop antennas if thats your thing..

https://www.ebay.co.uk/itm/Magnetic-Loo ... 3087845559
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Re: Wow, WOW, yet so much junk!

Postby deadite66 » Sat Mar 16, 2019 3:00 pm

m0lsx wrote: As Charlie Wolfe said


ahh good old baghdad chaz as ian collins used to call him.
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Re: Wow, WOW, yet so much junk!

Postby m0lsx » Sat Mar 16, 2019 5:00 pm

radiostationx wrote:Wonderfully made loop antennas if thats your thing..

https://www.ebay.co.uk/itm/Magnetic-Loo ... 3087845559


Those are very different to a MW or SW loop frame antenna & they are way over the top money wise for a SWL antenna. A SWL loop frame antenna only needs to cost a fraction of that. But if anyone is wanting to spend that amount on a loop tuner, then the MFJ small loop tuner is similar money, handles up to 150 watts & works on all bands above 40 meters. And my MFJ has given me some surprisingly good contacts on just 5 watts. But as I said, that sort of money is silly for a SWL loop, especially one without without a rotator & remote tuning.
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Re: Wow, WOW, yet so much junk!

Postby jmz01 » Sun Mar 17, 2019 1:57 am

This is great! Learning so much so quickly, thank you all.

Does the Tecsun AN 200 help with frequencies below 30mhz?
I can see one in my local shop for about £25.



But I think we will definitely have to make one too!




(as an aside, apart from what I think is an old horizontal TV antenna, there are some really odd antennas on the houses in our village. As I mentioned previously, there was a 'radio broadband' internet service available here until a few years ago, wasn't very fast but better than 56k, now we get 60+mbps, but I'm not sure what all the antennas are for, will photograph them and post a picture asap)
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Re: Wow, WOW, yet so much junk!

Postby m0lsx » Sun Mar 17, 2019 10:24 am

jmz01 wrote: Does the Tecsun AN 200 help with frequencies below 30mhz?


Yes & no.
The Tecsun AN-200 is designed to work on the Medium Wave (530-1710 KHz) band. So yes it works below 30 MHz, but not across the whole of SW. Mine works OK on slightly higher & lower frequencies. But not as well once you get too far from MW. But on Medium Wave it really is VERY good. Plus it looks OK too, something that cannot be said for a home made version.
A home made version can be made to your own specifications, air spaced tuning capacitors are readily & cheaply available & you do not need to be too big or clever with your antenna either. One of my Shortwave loop frame antennas uses the small plastic storage box that I use to keep my Eton, World Radio & TV Handbook & other such items together in. I then simply take out the radio etc, tip the box on it's side & then place the radio back into the box & turn it around to null out unwanted signals & optimise the desired one. The wire it's self is taped to the outside of the box & the tuning capacitor is fitted to the inside of the box. It is a bit of a bodge job, but I just wondered if I could make it work & it did with no playing around required. So I quickly soldered the wires & then glued the capacitor to the inside of the box. As why mess with something that works?
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Re: Wow, WOW, yet so much junk!

Postby jmz01 » Wed Mar 20, 2019 12:41 am

Brilliant thanks.
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