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Old 27th Feb 2014, 8:39 pm   #1
rjmusto
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Default Best antenna for MW Tx?

Hi,

As has been discussed elsewhere, I wanted to bring some life back to my old valve and transistor sets and stumbled across a simple AM transmitter design that would let me hook up an iPod and then listen to music or streamed radio. (legality issues aside...)

Built up a test circuit dead bug style. Works fine except that I have not found a good way of adding an antenna. A random bit of wire does ok, but is obviously very hit and miss.

I tried the suggested magloop, but couldn't get good results with that. Not experienced with these antenna types, so not really sure what I'm doing here.....

I am obviously not the first to this, so what's the recommended way of getting the RF into the air? Any details on a simple set-up would be great.

Thanks,
Ralph
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Old 27th Feb 2014, 11:34 pm   #2
Restoration73
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Default Re: Best antenna for MW Tx?

You can use a receiving loop in reverse - couple the transmitter output to the one turn
coupling loop as shown as #7. in this link :
http://www.mwcircle.org/mw_intro.htm
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Old 28th Feb 2014, 6:19 pm   #3
G6Tanuki
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Default Re: Best antenna for MW Tx?

I've always used 6 or 8 feet of wire as a 'throw-out' antenna. The resultant signal can be heard *ahem* a few hundred yards away.
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Old 1st Mar 2014, 10:02 am   #4
rjmusto
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Default Re: Best antenna for MW Tx?

Thanks both for the reply.

I did try hooking it up to my ham antenna..... but I didn't want to whole village to pick it up... I'm the only Brit living here so it would be kind of obvious where the source was....

I'd like to play with a magloop, so will have some fun making one and see how it goes.

Ralph
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Old 1st Mar 2014, 10:04 am   #5
Paul Stenning
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Default Re: Best antenna for MW Tx?

Quote:
Originally Posted by G6Tanuki View Post
The resultant signal can be heard *ahem* a few hundred yards away.
That range would mean this suggestion violates forum rule F2. Your action and post are also likely to bring yourself to the attention of OFCOM.

You may wish to read the forum rules again.

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