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Author Topic: A simple setup for meteors  (Read 4554 times)

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Offline Dave Dubya

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A simple setup for meteors
« on: 01:02:33, 06 August, 2009 »
It's been a while since I used this forum, and I'm extremely pleased to see a Radio Astronomy section here now!

Basically I'm looking for advice, as I'm a newb to radio astronomy.

I'm looking into setting up a simple apparatus for detecting the radio echoes from meteors. By "simple" my line of thinking is to listen for the "pings", rather than more advanced data gathering at the moment - essentially antenna -> scanner -> speaker.

I was going to use my current scanner (an ICOM IC-R5) but from my initial investigations this won't be suitable as it does not have a USB mode.

Therefore, I'm hunting down a Yupiteru MVT7100 for that purpose and intend to buy an antenna.

Can any of you tell me what sort of antenna is best for the job and if my idea of a simple setup is appropriate? (or if I'm talking total rubbish)

Thanks.

Offline Peter Shah

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Re: A simple setup for meteors
« Reply #1 on: 08:06:32, 06 August, 2009 »
i dont know a huge amount, but i use a 50mhz H-type aerial very similar to a  yagi, and a reciever that has usb or cw mode to hear the ping.....i use a program called spectrum lab to record the scatter. I tune into 59.257Mhz  ;)

http://ukastroimaging.co.uk/forums/index.php?topic=43405.0

cheers peter
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Offline Roger Banks

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Re: A simple setup for meteors
« Reply #2 on: 09:20:24, 06 August, 2009 »
Yes - as Peter says - low VHF frequencies are ideal as the s/n is much better with lower gain antennas. If your R5 has AM then use that.
Rog

Offline Dave Dubya

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Re: A simple setup for meteors
« Reply #3 on: 19:29:58, 06 August, 2009 »
So the IC-R5 might be worth trying?

I've had a look at Nevada Radio, Radioworld and the dreaded Maplin sites. I can't find these "h-type" antennae.

Would any low-gain antenna do the job? I've read about "discone" antennae being recommended.

Offline Peter Shah

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Re: A simple setup for meteors
« Reply #4 on: 20:09:13, 06 August, 2009 »
from what i understand a directional aerial works best, yagi type is more common.....you can make one quite easily out of copper pipe there are a few diagrams about showing you the correct dimensions and spacing.
an AG12 and a few other bits

Offline Peter Shah

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Re: A simple setup for meteors
« Reply #5 on: 20:20:30, 06 August, 2009 »
an AG12 and a few other bits

Offline Dave Dubya

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Re: A simple setup for meteors
« Reply #6 on: 23:57:26, 06 August, 2009 »
Brilliant, thanks your help.

Is this a commercially built equivalent to that? - http://is.gd/25Agr

Offline Peter Shah

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Re: A simple setup for meteors
« Reply #7 on: 08:13:26, 07 August, 2009 »
that one is built for 144mhz, but it is the type that you need just the wrong frequency......the tv signals that give a good return are around the 50mhz, (european about 600miles or so away)
an AG12 and a few other bits

Offline Dave Dubya

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Re: A simple setup for meteors
« Reply #8 on: 15:18:53, 07 August, 2009 »

Offline Peter Shah

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Re: A simple setup for meteors
« Reply #9 on: 16:11:45, 07 August, 2009 »
that looks very similar to the one i use.......not a bad price too 8)
an AG12 and a few other bits

Offline starf

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Re: A simple setup for meteors
« Reply #10 on: 16:41:30, 08 August, 2009 »
ive had some luck on 48.250MHz (Vännäs video carrier in Sweden) using AM on an ICOM R5. its hooked up to a wideband discone antenna.

how many millsecs is your waterfall scroll interval, peter?


edit.. thanks peter.

Offline Peter Shah

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Re: A simple setup for meteors
« Reply #11 on: 17:25:35, 08 August, 2009 »


how many millsecs is your waterfall scroll interval, peter?
i got mine set at 300ms
an AG12 and a few other bits

Offline 12dstring

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Re: A simple setup for meteors
« Reply #12 on: 07:18:26, 10 August, 2009 »
Starf, could I ask you a bit more about the success you've had with your setup?  I thought I'd give it a go after reading this thread and with the run up to the Perseids. I'm using a scanner with AM mode (but no USB) connected to a large discone antenna and have tried the frequencies mentioned here and a couple more - but have just been listening to fuzz for 3 mornings..

Can you actually hear the 'pings', or am I expecting too much?

Cheers,
Dave
Telescopes: Meade LXD55 SN10, Skywatcher Explorer-150, Skywatcher ED80 on HEQ5 Pro EQMOD
Cameras: Multiple SPC900NCs - SC1.5, SC4, 618.. + Canon 350D (ACF modded and peltier cooled)
http://www.12dstring.me.uk/astro

Offline Peter Shah

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Re: A simple setup for meteors
« Reply #13 on: 09:41:02, 10 August, 2009 »
Starf, could I ask you a bit more about the success you've had with your setup?  I thought I'd give it a go after reading this thread and with the run up to the Perseids. I'm using a scanner with AM mode (but no USB) connected to a large discone antenna and have tried the frequencies mentioned here and a couple more - but have just been listening to fuzz for 3 mornings..

Can you actually hear the 'pings', or am I expecting too much?

Cheers,
Dave
Ive been listening too there hasnt been that many yet!
an AG12 and a few other bits

Offline starf

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Re: A simple setup for meteors
« Reply #14 on: 10:40:39, 10 August, 2009 »
hi dave, peter

im still experimenting with this setup myself, so my knowledge is very limited.

You should hear a change in pitch if you have the DAC output on, or see a change in the background noise level in the output monitor. i dont normally listen to the output but capture the screen every 10 minutes so im not sure about the pings. I had it on 48.25MHz last night and not a glimmer of anything so ive changed it to 55.25MHz (Liège Bol d'Air) which has a higher power output.

ive tried to find david entwhistle's email for you. he was very helpful when i was looking at this last year but ive lost it.

regards

 

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