Posts by PY2RN

    Hi Ed,

    Portsdown is a hardware system for DATV: I am using the 2019 version, but with vMix. I have tried OBS and Pluto, but without success so far. rtmp and udp don't work here. I am also interested to see the right settings and the proper script for H265. If you are using Pluto, I think you don't need any Portsdown hard- or software, just the right OBS settings. Maybe someone could point us to the right information.


    Gerhard OE3GBB

    Hi Robert,

    I have an i7/16GB Windows10 . My display cards are AMD Radeon HD 6450 (I have two in the PC)

    Thank you

    Ed PY2RN

    Hello, working to get everything ready to transmit DVB-S2 DATV via QO-100 from GG66LW.

    I noticed that Pluto with F5OEO firmware and OBS Studio is almost standard among the stations I watch on DATV, I tried to search several places on how to configure OBS Studio but either it was too basic or not clear. I just installed OBS Studio sftware here, I never used this software before for anything so I don't even know where to start configuring it. Along OBS studio I also installed VNC and FFMPEG ( well, ffmpeg is a difficulty apart, there is no installation, just throwing the files inside C:/FFMPEG ?? ) What about " Portsdown " is it needed? Is it a hardware or a software?

    So if you please have any information to share or indicate I would appreciate.

    PS: I am aware about this wiki: but it is not clear/too advanced to me.

    Thank you.

    Ed PY2RN


    Several people still do not use LoTW and many others do not include PROP_MODE and BAND set correctly. But it is getting little better since one year ago :)

    <call:5>df3qe <qso_date:8>20200206 <time_on:4>1504 <sat_name:6>QO-100 <band:4>13cm <mode:2>CW OPTIONAL
    <qslmsg:43>tks fb qso via qo-100 sat. Pls cfm via lotw

    73 de ED PY2RN

    I’m wandering how many from the 86 DXCC countries had been verified by LoTW? I have a record of 3 1/2 to 1!!!

    I got today the nice QSL card from TR8CA. Can you hold LOTW in your hand ?

    "Life is long enough to collect nice QSL cards" ;)

    @HB9SKA Please do not confuse QSL card exchange with LoTW confirmation, they are different things and one does not replace the other :) LoTW is a very smart and economic way to request diplomas, but the QSL card is a good remembering of a contact.

    73 de Ed PY2RN

    My QO-100 most wanted! :)

    Entity Prefix Status Call 1 Call 2 Call 3 Call 4 Call 5 Call 6
    Georgia 4L W 4l/sp9dlm
    Montenegro 4O W 4O6AH 4O5JD
    ITU HQ 4U1I W 4U1ITU
    Madagascar 5R W 5R8IC
    West Malaysia 9M2 W 9M2CQC 9M62MY
    Nepal 9N W 9N1AA
    Botswana A2 W A21EME
    United Arab Emirates A6 W A65DC
    Bahrain A9 W A92GR
    The Gambia C5 W C5WP
    Morocco CN W CN8BD
    Cape Verde D4 W D44TWO
    Liberia EL W EL2DT
    Estonia ES W ES5PC ES9B
    Belarus EW W EU2AA EW6FS EU/AI6YP
    Reunion Island FR W FR4OO FR4KF FR4LI FR5FC FR1GF FR4KM/P
    Isle Of Man GD W GT3PYE/P
    Thailand HS W HS0AJ
    Djibouti J2 W J28PJ
    Luxembourg LX W LX1BB LX1WJ LX2MG LX2LA
    Bangladesh S2 W S21ON
    Sudan ST W ST2NH
    Crete SV9 W SV9IOQ SV9ANK
    Ukraine UT W
    Serbia YU W YT7VG YU7BPQ

    I think one of the biggest challenges today is to get a good measurements of our TX power, almost 100% of the OMs heard reports "my power is about / aprox / near / something between x and y Watts" obviously this excludes those few lucky ones with access to professional instruments. In my knowledge the only "amateur" instrument that reaches up to 2.4GHz is the Daiwa CN-801S-II Meter which costs almost the same of a fully ready to go QO-100 station, and the not less expensive and hard to find Bird slugs. Few months ago I got one of this Chinese digital power meter (picture) that claims go from 1MHz to 5GHz, cheap, but so far can not tell if it is functional.

    Their specs:

    Measuring power range: -45~-5 dBm (external RF attenuator can be extended to 80dBm)

    Measurement resolution: 0.1 dBm power

    Measurement frequency range: 1 1MHz-5GHz

    Measured power: 1nW ~ 2W

    Working voltage: 5V DC (direct selection MICRO-USB powered)

    Working current: <50 mA

    Working temperature: -40 ° ~ 65 ° degrees Celsius

    I just found that injecting a 0dBm @ 2.4GHz from a trustable source it displays -19.0dBm so I suppose I will need to input +19dBm in the correction factor to start, so I placed an external 20.4dB attenuator which brings the correction to +39.4dB.

    Using SDR-Console I generated a CW tone on 2.4GHz @ 100% drive and got about 12.5dBm readout (picture), so for me it seems a little exaggerated but it is what is showing. Please let me know if you had made any testing with this type of instrument and the results, also how did you calibrated it?

    Thanks, 73

    Ed PY2RN

    After having read all the comments in this thread, I do still have the following question:

    Which logbook software could you finally recommend for a newcomer on QO-100?

    Since many years I´m using HRD Log, but with being QRV via this bird now, I think it could be advisable to switch to another log programme.

    I do not use Log4om, I use DXKeeper, but may be a good option.


    Thanks a lot for this information, it recognizes my SDRPlay now :)

    Just wondering if there are similar procedure for AirSpy and Lime SDRs?


    Ed PY2RN

    ok, i see. thank you for your answer. i don't want to open new theme for issues like nightmare stabilizing xtal in LNB or so...., but my testing time is very long and nothing to say,bacause only 1 of 6 LNB under test was working with external source.

    about PLL is regular from RDA, 3566xx.

    You should see something similar to this in the pic.

    Both X1 and X2 pins will work, input at the corner pin (of the OS) is the low sensitive but better performance, -6 to +6 dBm input, the second pin is the sensitive input (-30 to +_6 dBm) but more phase noise.

    How long time change frequency is take to final stabilization ? How is weather affect to freq stability please?

    Can you send a picture of your connection to X1/X2 ports with TCXO? Whats going with xtal, C-load and other?

    Hi, there is no final stabilization, it will keep varying freq but +/- few Hz only while external temperature goes up or down but that will not cause much trouble, mainly if you protect the LNB from the wind with a radome. Regarding x1/x2 ports it will depend on the type of PLL the LNB has but in general it will work in either one, the other goes to a 1-10nF capacitor then ground.

    @VE4SW Hi Stefan thanks for your inputs, actually FreeDV I always enjoined it testing and participating on HF/VHF etc but seems on QO-100 there are few stations already too advanced for us which are trying to learn something, so I will keep out of this mode, at least on QO-100 :) Regarding the Full Duplex operations using more than one frequency, OK it may be an advance to the hobby, but I confess i this is not a mode that raises any interest to me.

    73 de Ed PY2RN

    DJ4ZZ some people seems to be confused regarding this experiment that took place last night, I just posted in Facebook a question and I do not know why one of the participants has posted another different thread few minutes after totally ignoring my question, not sure why, then when someone answered to my question I put my opinion there, then I started to receive lots of inquires why I was thinking that etc, but in the first moment I just asked what was that what seemed a wide digital signal, that's all, I do not judge here if this was valid o not valid experiment. So good to know that it is permitted full duplex operation using different frequencies in the QO-100 transponder.

    I still think it will be a little confusing for all the stations to find out who is speaking with whom because we may use any type of off-set I believe and don't need to be so close like you guys were yesterday so in my opinion this breaches a little the amateur radio ethics, but many disagree with this as well, but it is OK we do not need to agree in everything :)

    Yesterday I was observing a signal sounding a type of digital mode with approximately 3.5KHz wide staying there for hours, I made a record and posted in a QO-100 Facebook group asking what it should be? The answer: these were two Free DV signals next to each other and the OMs were testing full-duplex mode using FreeDV.

    I just put an advice that the NB tp should not be used for Full Duplex comms (IMHO) for both analog or digital modes, then few people seems to get really annoyed with that advice and most of them declaring their support to type of full-duplex operations, and this is great mode and the future of ham radio etc. So I may be really outdated here but I though that ham radio SAT operations by nature is full-duplex, where you tx in one freq and rx in another, but using just one freq, now it seems the new and modern way to go is to utilize several frequencies at same time for the same QSO, if this is the case please let me know the procedure, like what would be the off-set from one signal to the other, etc. May be the band plan allocation for the NB should be redesigned?


    Ed - PY2RN