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geppetto

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Everything posted by geppetto

  1. Hi folks My grab was from about 8.30pm to about 9.30pm. Time scale shows local (BST) time... Phil
  2. Hi Steve. Not counted yet but will sort through my images for an estimate.... Looked to be better than my grabs from last years Perseids though...
  3. Setup my meteor radio grabber to cover a 12 hour period between about 9pm last night to 9am this morning. Clear to see the shower peaking early morning.... Timelapse here, press to view http://vid72.photobucket.com/albums/i175/hantercans/AC/TimeLapse_x264_001.mp4
  4. Hi Steve.. I've dabbled with meteor detecting for 6 or 7 years now. I only monitor during showers though as being a radio ham, my gear is tied up doing other things. One thing I do a lot of is detecting the effects of solar activity on radio propagation. If you don't know of it, google..SID monitoring. OK on your antenna, have you tried it vertical on your mast?. I found vertical to be better when I was using an antenna similar to yours. Worth experimenting.... Re the scripts I use in SL, they were given to me a few years back. If you PM me your email address, I'll zip them and mail them to you for a look see.. Phil G4JVF
  5. Hi Steve I'm monitoring GRAVES using a Funcube Pro+ fed by a simple 1 meter long "white stick" vertical antenna on my roof. I'm in Chesterfield area... Phil G4JVF
  6. Here's my collection of grabs of the Lyrids. Roughly 12 hours over night. Images stitched into a mini movie... http://i72.photobucket.com/albums/i175/hantercans/AC/th_TimeLapse_mpeg4_2.mp4
  7. This TenTec 1056 I used originaly still looks a good bet... http://www.tentec.com/products/Any-Band-Direct-Conversion-Receiver-Kit-%252d-Model-1056.html
  8. Yep that's me....there can be only one Interesting stuff Les... Pleased to hear the little loop worked for you, I'll have to have bash at making one. My BIG loop worked but it was experiment only and it was too big to stay in the garden. Not all a loss though as the reflector frame with the chicken wire is now holding up a rather nice display of sweet peas.. All good fun this... Philip G4JVF
  9. Les Have you actualy used one of those loops for Jupiter reception and did it work? Some folk say it does and a lot say it doesn't.... Be interesting to make one if I know somebody has had success with one... Philip G4JVF
  10. Hi Marcus If you can stand the pace, I did a thread about this quite a while back http://stargazerslou...adio-astronomy/ Problem with Jupiter reception is that not a lot happens most of the time and as such, might not keep your students interested.. Solar activity is a bit more dynamic so is a better choice IMHO. Also, you might consider detecting meteor reflections as that happens day or night... The frequency for this is 143.05 USB so with a bit of tinkering you could use a cheap TV dongle, some free software and a cheap 2 element aerial which neednt be mounted high up.. http://astrochat.co....pic.php?t=16921 Good luck with your projects Philip G4JVF
  11. Yes, JAB is good Think they have 1% polystyrene caps.... Good luck with it Mike:icon_salut:
  12. Hi Mike Think I used this one... Re the loops, they do work but not well enough realy.. Still got some more tests to do but my aim is to build and test a Moxon design... MOXON Antenna Project These work very well. I lashed one up a couple of years back. Still a big antenna but much smaller than the Radio Jove double dipole... More on that when it gets a bit warmer
  13. Gemenids have been building all day... Lots of pings at the moment:)
  14. Howard Have you got the radio set to USB? I get good reflections from Dijon using an HB9CV and I'm in north Derbyshire...
  15. Just a big thank you to Dave and Iain for pointing me in the right direction with this. 99% got a meteor detect system tested a running....
  16. Yes indeed, 15 and 10 meters are really "hot" at the moment and I've been monitoring the chunk of bandwidth that the scratch built Radio Jove look-alike works on. Fortunately, it remains fairly quiet even through a major lift in conditions on 15 meters a few nights back. Within the tuning range, I get the time signal on 20Mhz which really comes in well whilst these conditions exist and there are a couple of CW beacon type transmissions nearer to 20.1 Mhz. It seems that consistently, there are plenty of quiet spaces within the tuning range. Reason I'm monitoring carefuly is that I want to choose the quietest sweet spot so I can have a crystal custom made for that frequency which will give a much better stability. Having said that, it will be a VXO so I can tweak it a little.. Another thing for future experiment is a USB synthesiser kit from SDR-KITS. Just finished building one for a QRSS project but at the price, it would make a fantastic uber stable digital VFO for the Jove receiver.... Probably cheaper than having a custom crystal made... More on that another time... Downside to these conditions is that Jupiter signals could end up being attenuated by the upper layers but on a brighter note, during the sunspot maximum, there are plenty of solar flares to monitor which my kit is doing at the momement.... SDR-Kits
  17. Thanks for that Mike... Good to know some are available again..... Just one hint, get some better quality capacitors for around the tuning circuitry... As is, the receiver can be a bit drifty... Not a real problem as drift in this sense of use doesn't really matter. However, if you are picking up some earth based transmissions and you set the receiver between them then sods law says it will drift and settle onto one of those unwanted transmissions. Some NPO caps or better still but harder (dearer) to get, silver mica or polystyrene 1% Best of luck with the build:headbang:
  18. Gaz The first receiver I built on this post doesn't seem to be available any more or at least I haven't seen one for a while. I would say the Radio Jove kit is the one to go for but it is fairly expensive and it comes from the USA which adds P&P and taxes etc... My Radio Jove look_alike is totaly built from scratch including a home made copy of the printed circuit board..... interesting project to do but you need a fair level of interest/knowledge in radio/electronics. The aerials are fairly big at this frequency and again, the double dipole suggested in the Radio Jove project works very well but takes up a lot of space. There are various aerial designs and I'm experimenting with smaller loops but at the end of the day, the aerial is the most important part.. I find all this stuff interesting and satisfying to experiment on but chasing elusive few and far between tiny signals is not for the faint hearted... John The receiver tunes roughly fro 20MHz to about 20.200MHz. Within those constraints it will receive anything that's there but astro wise, Jove and Solar are the targets. Fortunately (and this is a reason that frequency was chosen), that area is fairly quite of earth produced transmissions. There is a time signal on 20MHz but little else to bother about.
  19. Bit of a scary moment this evening.... Totaly out of nowhere we got one massive bolt of lightning and some crashing thunder....not forcast and a hell of a suprise... Anyhoo, sods law...the new GepJove receiver was part way through a 48 hour soak test and yes, you've guessed it, the little rig got some static up it and they don't like it up em! Took out the front end rf amplifier FET transistor but quickly fixed and it's back on soak test...going to fit a couple of gas discharge devices tomorrow (sort of device you find in telephone wall sockets) Good recording of it's death on the running Skypipe chart... Shows normal noise floor then a hugemendous spike followed by the expected flat line..... Mother nature has the upper hand that's for sure
  20. The Jove design seems a bit more sensitive or at least a bit less noisy... Testing this afternoon and the time signals on 20MHZ were coming in well on the new dipole... Has to be said though, the bands around this frequency are hot at the moment... The winner all round is my SDR receiver regarding noise and sensitivity but this GepJove is a close second.... Very pleased with it:glasses1:
  21. Nice day today so put up a better aerial for Radio Jove etc.. Simple half wave dipole (11' 7" per leg) but this time I have calculated the height such that the maximum pickup angle (vertical) matches the height in the sky of Jupiter as it passes due south... Dipole is east west so maximum pickup (horizontal) is north south again to match Jupiter's position. New scratch built Radio Jove receiver is now in the Geppetto command centre AKA me shed Well away from house electrical noises and running on a leisure battery which is constantly charged by a large solar panel.. On in the day for grabbing solar activity and at night in a few more weeks to watch Jupiter which is climbing higher now... Computer is my very low energy usage Atom processer astro puter. Runs about 40 Watts with monitor switched off.... More later..
  22. All boxed and tidied up today. Just been setting the ouput levels ro suit the SkyPipe charting software. Nice stable base noise level and very sensitive to noise spikes and such which is good news for Jupiter grabbing... Nice little receiver
  23. Circuit of mods to provide options in tuning circuit...
  24. WooooHooooo! It works Well it does now, after I fixed a small mistake I made on the printed circuit board but I'm allowed one mistake Very sensitive and stable, picking up the time signal transmission on 20 Mhz with no problem at all.... Done a slight mod to the tuning circuit in such a way that it can be easily clicked back to orional. Idea is that during long term running, these simple tuning circuits can drift. Not a problem normaly unless it drifts into an unwanted broadcast signal. The mod involves two little sockets on the board. In normal mode, the capacitor shown is plugged in to connect the standard tuning circuit. In stable mode, the capacitor is removed and a crystal (kept on the board) for safe keeping, is plugged in as shown. This only gives the tuning one fixed frequency but it's hugely more long term stable. Always wanted a Jove receiver to play with and now I have one.... Next job is a double dipole down the garden and I'm set for Jupiter as it climbs higher towards winter.... Great fun..
  25. Doh! My last post should have said 20.1 Mhz not 21.1 Mhx...sorry Nillchill... Sadly, the kit I made the first receiver from is no longer available or at least I can't find any anymore... Scratch build like this latest project is about the only way now unless you fancy spending a fair bit of money for the genuine Radio Jove kit from the USA.. NASA's Radio JOVE Project: Kit Requests You can of course listen on most types of short wave receiver but a dedicated machine is best as these signals are weak, fleating and not very predictable so you need a system set up to do long run monitoring...
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