Posts by ON4CJQ

    How about the dozens of ham's who use the web-SDR as receive system, because their own system isn't working that good on rx or even don't have an rx setup, isn't this remote too?


    73's Jerry

    This is my portable setup, the only thing you don't see on the picture is the FT817 and dc supply.

    35cm with well tuned helix 5.25t and with 6W only, i have 3dB less sig in peaks then upper beacon some weeks ago,so before the wider bandwidth we have now on the transponder.

    It's working better then the patchfeed. I have made a comparison list with different antennes for uplink, i will post it here later.

    Hmm, looks file is to big, need to change size first.

    Robert

    you can make a mall on a foam plate, calculating X and Y axis values and write them down on the foam. You will get a nice parabole and cut it out carefully. Check the shape off your dish and use the mall for resizing your dish to a bigger reflector. Also the position of the feed changes. When using mesh on 3cm, theory says 1/10(3mm) but that is too big. In practice 3mm*3mm is maximum use on 3.4GHZ. Try to use 1mm*1mm or smaller. Also the shape of the complete dish surface must be within 1.5mm.


    I made a mall for a mesh dish extension from 1.90m to 2.7m,but doing the extension will be in a few weeks when it's getting warmer.


    73's Jerry

    As far as i know, i thought 3A is not allowed above 70cm for amateur use, or am I wrong?

    If it was allowed, i would be activated last september by one of our clubmembers.

    But i could be wrong.


    Jerry

    I now assume that the LSP-02G is meant for center fed dish ?

    I don't think it's for a prime, seen at the shape off the horn. Prime use more the Chaparral design.

    Anyone has an image of a seperated lnb from its Bamatech waveguide?

    It should be easy to change the lnb into another brand, but i'm not sure.I don't have a Bamatech.

    Mine is DC5GY duoband feed with modified lnb on the back off the waveguide.

    Hello Jan,


    I have a modified octagon on my dualband feed too, but never leave it powered on. No problems when powering on, in less then 2min all is stable here. Even in weekends, i just switch the power on for the complete station when i want to work the sat. Good luck and welcome to the transponder.


    73's, Jerry

    Logging sat-qso's: Use TX freq instead of RX-freq. An SWL uses the RX freq for logging.

    So band is S/X and not X/S and on LoTW QO-100 and not QO100 as satellite, mode SSB or..., propagation SAT.

    When confirmation is poor, there could be a few reasons: wrong parameters used by 1 or both stations when uploading; not much OM's are using LoTW


    73's Jerry

    I fully agree to work in split when DX is on the sat, because some stupid ham's still love to use too much power to get over the pile-up. In split, also weak stations have a bigger chance to work the dx, and as DL5RDI mentioned, you allways hear the DX station talking.

    What is, in my opinion, the benefit of working full duplex? There is no need to here yourself. Just working simplex here and never had any problems, no need to hear my own voice. Worked also in split with the FT817, 2m as IF TX band, 70cm as RX. Just check only once the freq offset between up and dwnlink, allways right afterwards.

    It's irritating that people still need to tune on the right freq, giving an echo on their modulation when they go on air because in the background some sdr-stuff's volume is too high.


    73's,Jerry

    I received the downconverter (completely build in box) without any problems, no taxes etc. I think it is just the way how the package is sent to you, meaning what is written on the paper on the package; and the price of the goods. Best is to ask him first and tell him that there could be a problem with taxes etc in your country.


    73's

    Jerry

    Hmm


    Not the first time i sent some personal emails to operators who were having a signal which was too strong, 6-12dB above PSK bcn.

    Some do understand, others just blew away the comments.

    Let's make a public list with stations who do have such stronger signals then the beacons.

    Especially when a new dxcc is in the air, a lot of stupid op's use suddenly too much power to be the strongest in a pile-up.

    Why why why? Just follow the rules and enjoy the sat, even in a pile-up.


    Hear you all,

    73's de Jerry

    Hello David, i did it another way, but i've cut the horn where it has +- the diameter of the inner size from the copper tube, i think 4mm is left from the lnb, just enough to punch it into the pipe. Then i used an adapter with inner dia 22mm,outer 25mm which sleeves over the copper tube and the waveguide from my feed.NOTHING is screwed and fits nicely,doesn't move anything.

    73's Jerry

    Guntram, are you in the focuspoint of the dish? Try to move the feed towards the dish,or away from it and look on the websdr for your uplink sig, for rx side use sdr stick+ program to see the difference.

    I have a patch for the uplink in a 60cm dish with f/D 0.4, and works FB for uplink, another same dish i also have here with a ve4ma waveguide feed for rx,but this feed has choke ring to meet the dish better.

    I can compare the 60cm with patch and my 95cm offset with dualbandfeed tomrrow if you like. 60cm should be less strong, in order +-2.5dB

    73's Jerry

    Hi Frank, 2db lower then the beacon with 5w onto a 31cm dish is very very high, are you sure about the uplink power? Such a small dish has 27db on the dwnlink, a 85cm about 10db more. So most of us has about 2dB less than beacon with 4-5w on 85cm!

    I even heard someone today with 2W in a 85cm dish and was 6dB stronger then the upper beacon.Impossible so much differences,in the understanding that all is correct mounted,though.


    73's

    Jerry