Antenna

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Antenna

Postby Shambles » Mon Aug 14, 2017 8:57 pm

Anyone suggest a decent base antenna for a Uniden BCT 15x Scanner, that covers most things that are available especially Aircraft and Control tower,i was thinking of a discone but which one

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Re: Antenna

Postby m0lsx » Mon Aug 14, 2017 9:31 pm

If your main interest is airband. Then why not consider buying an antenna that is optimised for that.. An Airband antenna will work away from the airband, it's just it will be compromised away from airband.
Discones, should give a better broadband coverage than a simple vertical.
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Re: Antenna

Postby Shambles » Mon Aug 14, 2017 9:37 pm

Alan I have been looking at Diamond White Stick, I'm just a little concerned it will only pick up Aircraft and nothing else
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Re: Antenna

Postby m0lsx » Mon Aug 14, 2017 9:54 pm

I believe that is the 777? Being a Diamond it will be, or should be well made.
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Re: Antenna

Postby Shambles » Mon Aug 14, 2017 10:13 pm

Alan. I am looking at the Diamond D -3000 super Discone antenna,what's your take on that please

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Re: Antenna

Postby m0lsx » Mon Aug 14, 2017 10:51 pm

I can find a D3000n, but I cannot see it on sale in the UK & it looks to be around $155 in the USA. A reasonable discone can be brought for around £50 up.
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Re: Antenna

Postby Shambles » Mon Aug 14, 2017 11:05 pm

Alan the Diamond D -3000N Super Discone is at RadioWorld

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Re: Antenna

Postby m0lsx » Mon Aug 14, 2017 11:24 pm

Normally Diamonds are well made. And it will certainly do what you want, but really only you can decide if that is value for money.
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Re: Antenna

Postby G4RMT » Tue Aug 15, 2017 8:28 am

Doesn't help - but my first discone I made myself in school in 1974 for my final metalwork project - mainly because they're mechanically simple, very robust, and just lots of repeating. Casting the two aluminium hubs, then drilling and tapping the holes, then spinning all the threads. A bit of paxolin for the insulator and a socket and one bit of wire. It lasted until my first house move in the late 80s, when it got left behind. I suppose this is why they're still expensive - just too many components and weight, plus the cost of the actual metal.

Thinking about it, apart from wind resistance, making a solid discone with modern materials would be pretty easy - why don't people do it?. I'm thinking of something like a cone made from plastic, covered in something conductive, then same with the disc? Kind of a lamp shade screwed to the N type, then a plate on the top araldited to the top of the N type with the pin soldered to the conductive stuff glued to a plastic plate or something. You can get very thin copper sheet.

If you used copper, it would also weather really nicely. Might be a bit flimsy for exposed conditions, but for a wall mount in a sheltered place, it could be a decent performing aerial, and if you don't need extended frequency coverage downwards, it wouldn't even be that big?

1m x 300mm on ebay is £13 for copper foil?
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Re: Antenna

Postby m0lsx » Tue Aug 15, 2017 9:47 am

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