I just built the G0MRF down converter to 2m. It also has a 739MHz bypass output. Put into a metal case and seems to work fine so far.
vy73 de Florian DF2ET
Posts by df2et
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Dear OMs,
walking around the flea market on HamRadio in Friedrichshafen we ( DG3YJB DL5APR G4KLX DL1YDD with DL5BQ and G6WBJ) found some guy selling a 40cm dish for 8€. After we bought all of those we had a quick experiment at our holiday flat that we were staying in during the fair.
After wiring up the commonly used setup (LNB -> BiasT -> SDR Stick) we could cleary decode the CW beacon and even listen to SSB QSOs. May those pics inspire people with limited capabilities to setup a QO-100 station
vy73 de Florian DF2ET
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Absolutely no problem. Just wanted you to have that on the list for next year. If it's on there already I am fine.
Besides this minor issue I found the meeting to be very useful and I would appreciate if we manage to have a similar meeting next year. Thank you for organisation.
vy73 de Florian DF2ET
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Hello Frank,
I also got no instruction how to use the REF input. My Email concerning this was answerd that "the manual is still in work" and will be avalilable later as download on the DB6NT Web-site.
I also opened up my converter and saw the same like you. So let's wait for the instruction to download and for source for a (cheap) cable with the fitting connector.
73 de Johannes
Hi Johannes,
I did have a talk to the Kuhne guys at HamRadio in Friedrichshafen and asked for the details of the reference input of the modified MKU 2424 A converter. They referred me to the manual for the recent B version where you can read as attached in the image. See below. It also applies to the factory-upgradede MKU2424 A.
vy73 de Florian DF2ET
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2. The prices on the dinner menu were much higher than shown in the standard menu. I think approximately 20% more. I know that restaurants have a service charge for big groups, but that does seem excessive.
I can confirm that. At least item No 2 from the menu was 25% more of the price at it was on the ordinary menu. :(((
Besides that the food was fine and the talks and the meeting itself were very good!
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Yes yes ...
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You are right. You should be able to separate the two halves by loosening the 4 lower screws.
vy73 de Florian DF2ET
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Hi @ll,
I also got my repaired/upgraded KMU UP 2424 A back a few days ago. But I am still missing the updated manual concerning the REF input. In the meantime I upgraded the case and added a SMA/UFL pigtail.
Did anybody test with an external reference yet?
vy73 de Florian DF2ET
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Hi @ll,
besides all rumours that it would not work we tried to decode the DATV bacon on the WB transponder with a "standard" satellite receiver and tested successfully. Downlink via 90cm offset dish, an Octagon Greed Quad LNB modified by me for external reference and a Dreambox DM8000.
The LNB was fed with 24.3MHz from a LeoBodnar GPSDO to shift the IF of the WB transponder to the input of the SAT RX. Using a manual scan we found A71A and could watch the demo on a flat screen. A short recording is uploaded to YT:
External Content www.youtube.comContent embedded from external sources will not be displayed without your consent.Through the activation of external content, you agree that personal data may be transferred to third party platforms. We have provided more information on this in our privacy policy.vy73 de Florian DF2ET
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No need to translate it. Here is my Englisch write-up: https://www.florian-wolters.de…or-eshail-2-slash-qo-100/
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Tag zusammen,
in Anlehnung an die vom BATC beschriebene Modifikation des Quad LNB OQSLG von Octagon habe ich eine SMD Variante der Modifikation mit Teilen aus der Restekiste durchgeführt. Im Wesentlichen handelt es sich um die Entfernung des 25MHz Quarzes für die PLL und stattdessen Einspeisung einer externen GPSDO Referenz. Dafür wir der hinterste der F-Ausgänge zu einem Eingang umfunktioniert. Der DC-Zweig wird entfernt und stattdessen der Mittelpin über 2x 10nF auf den Quarzeingang gelegt. Tests bei DL0CRE zeigen, dass das LNB deutlich! frequenzstabiler ist. Die 25MHz wurden dabei über einen LeoBodnar GPSDO erzeugt.
An den Stellen mit den gelben Kreuzen werden die Leiterbahnen aufgetrennt. An der Stelle 1 habe ich einen 0402 0R Widerstand eingebaut. Bei 2 (0402) und 4 (0805) kommt jeweils ein 10nF Kondensator rein. Bei 3 habe ich einen 1206 100R Widerstand eingelötet, weil kein kleinerer verfügbar war. Nach Modifikation sieht das ganze so aus:
Das Original mit bedrahteten Bauteilen findet sich unter: https://wiki.batc.org.uk/Es'hail-2_LNBs_and_Antennaes#Locking_the_Quad_Octagon_LNB_to_a_25_MHz_Reference
Wichtig hier ist, dass man tatsächlich die PLL Variante des LNBs erwischt. Es gibt unter der gleichen Bezeichung auf DRO Typen, die hierfür nicht brauchbar sind. Quick and Dirty Guide zur Unterscheidung: https://twitter.com/flo_0_/status/1099651890462294021
vy73 de Florian DF2ET
