Posts by IK8OZV

    Hi guys i think it is better to clear all as we cannot get to the end.

    I start from the beginner.

    I have brought The Adlam Pluto from Mouser time ago.

    As i am not clever on SMD and modifications i've sent the Pluto to a Dutch OM that he made the TXCO modify for me.

    Until here all was OK on the RX so i got started to go in TX but for an my distraction i have mad an reversed polarity on the CN0417

    that caused a faulty in the Pluto. It was not even recognized anymore when i plugged in the PC, even no Pc USB connection sound.

    So i called the OM who made me the TCXO modify asking him it he could have a look and eventually fix it. He said to send him all and he would do the best to fix it. He made some test and finally he said that i have killed the communication chip. After a couple of weeks he called me and sending me a video where he said that he has fixed the Pluto and in the video he shows a test made with a a Yaesu FT 847 in 70 cm on FM. In the video he made the test with the SDR Console software and he shows sending the tone from the SDR Console and receiving it on the Radio. As the Pluto was already to him he asked me if i would like to have also the PTT modify and the Anti Jitter.

    I said yes and he done them. He sent me back the Pluto. I have the assembled just the RX part Pluto -> Bias Tee -> LNB on the dish.

    Loaded the SDR Console and tried to find the Satellite signal. Yes i found it but with the problem i've said before with a lot of vibration and incomprehensible. I re called him saying about the problem but he said that there is no problem and maybe there should be problems on my side. As i have said before, i have tried to change the LNB but get the same problem. I have tried to change the SDR Console software with the SDRSharp one but always the same issue. I have tried to delete and re install the Pluto drivers but always the same and finally I have tried leaving all the hardware and software as they are and just replace the pluto with and a NEWGEN.RTL2832SDR stick:

    I get the modulation clear as before the polarity revers on the CN0417.

    Hope this story can definitely understand the problem and what is faulty.

    Thanks a lot for any help

    73's de Enzo IK8OZV

    P.S. if needed, i've made a short video but cannot post it as it is about 17MB. I forgot to say that in DATV it works


    First please apologize if i am posting in a wrong place.

    i hope in an help.

    It is a while that i am encountering problems while receiving the QO-100 satellite. I am noticing that the modulation is not clear but it as if the voice vibrates. I have tried with both programs SDR Console and SDRSharp and both give me the same problem.

    I thought it could be drivers problems or programs settings, i have tried to RX the QO-100's signal with a NEWGEN.RTL2832SDR Stick and the SDRSharp and i have noticed that the the Modulation is clear and without any vibrations as on the Pluto.

    I cannot understand if the problem is actually the Pluto or if it could be something else like fore example the LNB or the LNA.

    I have also made a video that is registered the QO-100's audio but cannot upload it on the forum as it is about 30MB.

    If needed i can PM to how need it to understand the problem.
    Please, Please anybody can help me to solve the problem?

    Thanks in advance for any help that will be really appreciated.

    73's de Enzo IK8OZV

    N.B. Tonight i have made a test:
    i have tried to TX with my Kenwood TS-2000X and RX with the Pluto and have noticed that if i TX in FM so the the

    modulation is clear and understandable perfectly while if i TX in USB, i get the problem above.
    If it can help to understand the problem.

    Thanks once more

    Heiner Please can you tell me exactly what to do?

    I have tried with the diode between

    The PIN DATA of the display and the PIN SDA of the Minitiouner Pro2 Connector JP3

    In any way I put the diode the issue does not come out but the display does not work



    to be clear please can you tell me the exact pins name as you put both SCK then correct to SCL but

    if you have a look on the previous message, the display PINs and the Minitiouner ones has some PINs named different between




    Hello Heiner,

    today i have tried how i said last day to box the Minitiouner.

    After have boxed it i got again the Problem, unboxed again and tried step by step

    which could be the problem. First i have fixed just the board and tried it. Powered up and it worked perfectly,

    Then i have connected all the LEDs and retried again. On this step again all OK finally i have plugged the display and retried.

    Guess what? the problem popped out again. So re opened the box, unplugged the display, re powered on again and it worked again

    perfectly. So i think the problem has to be with the Display but i cannot understand what could it be as the Display comes already assembled.I have connected in this way:

    The VCC of the display to the VCC of the Minitiouner Pro2 Connector JP3
    The DATA of the display to the SDA of the Minitiouner Pro2 Connector JP3
    The TC/CLK of the display to the SCL of the Minitiouner Pro2 Connector JP3
    The GND of the display to the GND of the Minitiouner Pro2 Connector JP3

    The only thing i can think maybe something with the bridge soldier

    done from the middle Pad and the Pad named I2C of the display.

    Do you have any idea??

    Thanks a lot

    73's de Enzo IK8OZV

    P.S. to complete the test i have tried to connect the display one pin at time making the test on each

    connected pin and have noticed that when i connect:

    The TC/CLK of the display to the SCL of the Minitiouner Pro2 Connector JP3

    I get the problem.

    IK8OZV Enzo please post what you finally have found as the root cause... pefect.. glad to see that it is working now..

    Heiner, i did nothing. Do you remember that i said to have the problem since i have boxed it?

    Ok Tonight i thought to unbox the board so tomorrow i could change the NIM. Well after have unboxed it i put it on the table just the board, no LEDs no switches.Powered up and puff as soon i powered it, i got the Beacon signal.Until now i have tested it from 1500KS (Beacon ) down to 125KS. I am now testing with a 66KS signal. i got all the smeter fully clockwise and all the LEDs on the bottom left green.

    On the bottom right i got all the LEDs green except the last one that switches from red to green and from green to red. I do not know if it is an my problem or it is his problem.Now i have the LNA gain fix to 10.5dB.

    Can you tell me what can it be?

    Thanks once more for your helps

    73's de Enzo IK8OZV