Thanks Peter! Works fine and the markers in SDR-Console were quickly adjusted to the new band plan.
The upper beacon has still the same level and my signal varies about 1dB over the transponder and has max. lower beacon level.
Regards Mike
Posts by DL1GNM
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Also hier mein POTY mit ABS-Haube fertig silikoniert und montiert...
Ich denke, die Dämpfung von ABS bei 2,4 GHz ist im Rahmen und nicht all zu hoch, das 10 GHz Signal wird ja so nicht beeinträchtigt. Das Silikon ist hinter dem Hohlleiterausgang und der wird mit der (Venton) Linse abgeschlossen. Bei 10 GHz wäre ich mit ABS vorsichtiger, was aber hier keine Rolle spielt. Alternativ (ohne 3D Druck oder Fräsarbeiten) ist dann Heiners Lösung. Oder meine Vollumhausung.
Gut gemacht.
73 Mike
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Please compare with rocket and post-results@Mike:
POTY with POTY lens but without radom: MER 6.9dB D4
POTY with Venton Rocket Lens, but without radom: MER 8.8-9.0dB D6
POTY with Venton Rocket Lens, radom old position: MER 7.7dB D5
POTY with Venton Rocket Lens, radom new position: MER 8.7-8.9 dB D5/6
DATV-Beacon, empty WB Transponder - Habe die DATV Bake benutzt zum Vergleichen.
Result (Ergebnis): +2dB besser zu originaler Linse von Hans, PE1CKK, aber inkl. Radom. F/D ca. 0.68, Offset-Spiegel 120x129cm
Details found here (Details hier): DL1GNM-Antenne-Feed-LNB
73 Mike
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Hallo, bei mir sieht das so aus:
Hier gepostet: dl1gnm-going-to-be-qrv-soon
DN125 PP; passt locker über POTY.
Gruß Mike
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Hello Nader,
Watching the WB Transponder you'll need the capability of DVB-S2 and very low symbol rates. If it's old, it can't do DVB-S2 (and probably only down to 2000KS/s).
I decided to use a Minitiouner Pro V2 with the F6ZZP software.
Have a brief look here: https://wiki.batc.org.uk/MiniTiouner_hardware_Version_2
To watch TV you'll need drivers (where to get ?!) and a DVB application like the technisat program, progdvb or similar.
Perhaps somebody know the exact Model of your card. Then it's easier to find the right software+driver package.
May be this one:
https://www.technisat.com/en_X…n/352-515/?productID=7705
I found a german installation manual, see page 10. The photo looks similar to yours.
https://www.technisat.com/asse…a_AIRSTAR_2_TV_PCI_de.zip
A hint if you install drivers: please do clone your windows harddisk. I had some bad experience in my past during a crash of the software. i could reinstall windows many times. Since then I use an imager for my hard drive.
Best regards, Mike
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Winlog32 from Colin, G0CUZ, I've a lot of QSO in this log. Sometimes I meet someone on QO-100 I've met a log time ago on KW, 2m, AO-13 ...
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Today I had QSO with Zoli, HA3KZ, a bit surprised
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No one heard from Hungary so far. Do they have an allocation? YO, LZ, OM, OK, S5 are QRV.
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Right. The AB003 has the same MMICs inside but a much bigger case and heatsink. It's a good idea to switch it into standby during receiving.
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Yes Thomas, but the 4W version needs one!
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During QSO's I observe my signal on the Goonhilly WebSDR. If I send a long duration CW-signal it drops down after a short while. I think because of overheating. After a break the signal is OK again. In SSB I have no problems with this booster. But I think for digital modes this booster is not suitable with small dishes.
73
Thomas, I observed the same with the "4Watt" version I borrowed. Even during SSB. After mounting it on a big heatsink I had no problems.
Since end of July I'm using the SG-Labs transverter, that is working very well.
Regards, Mike
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I'm using SDR console - signal history. I wait for the CW-carrier of the QO100 beacon (2x in the middle) then i change to my frequency and CW-key down (mine right on the picture). It's on the same level. May be 0.5dB above...
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For every lens you need to adjust the focal point, because the phase centers are not the same.
I agree - As I observed with my dish: Venton Rocket Lens LNB seen as in picture: MER 5.2dB D2 (not in focus !) Usually you get good results with this lens. But not at that position I've put in this VENTON LNB.
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...thrown away after removing the lens.
Did the same but with a MAXIMUM XO-R2 LNB. Bought is only for the lens (~6€).
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Sounded like an digital and unstable signal. Strong and wide band. S/N of the CW beacon was degraded by more than 10dB! I can confirm what G8AWB heard.
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Finally the transponder noise of the NB transponder:
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Today I and many others observed heavy QRM on the satellite not caused by a 2m transponder. Attached you'll find some screenshots from my receiver and Goonhilly.
Date: 2019-09-08
Time: 13:18 +- UTC
Root cause unknown. Sun? DATV? QO-100 problem on NB transponder? I don't know.
Goonhilly:
My receiver:
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Mike, if your 2.4m dish gives you an MES of 10dB I can be happy with 8.8dB@ my 1.2m dish. It's the same as the Goonhilly station uses for QO-100 monitoring.
Mike
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Interesting Mike. I'm using Leo's GPSDO because I'm on the NB transponder in SSB as well. The LNB was wobbling terribly.
After realigning my dish the MER is at the same level as it was at first install without having the LNB modified.
I'm using the recommended setting from Leo Bodnar for 27 MHz & 10 MHz. If you have better recomodations to set up my GPSDO please let me know.
BTW: is a MER of 10dB the maximum possible value? I think there is a limit.
73 Mike
