Posts by OE3MZC

    DXPatrol GROUNDSTATION is a great product,

    simple to use for everybody,

    has good reception -even with small dish (35cm)-

    output power will never trigger LEILA, if you use some meters of coax cable from groundstation to antenna and dish is smaller than 75cm.

    if you hear some station calling CQ, you can just answer on same QRG and will be perfectly on frequency- no OOHLAA or whistleing needed.

    Working great with WINLINK on VARA-SAT with IS0GRB.

    GS is perfect fit for EMCOM emergency communication!


    ok, it will take 3 mins to lock oven and GPS

    but there is nothing more compact and simple for holiday-DXpeditions or similar.


    I am QRV on QO-100 since the beginning and have done all the experiments with two TRX, BU500 upconverter, modified LNB myself, Bodnar GPSDO, IC-9700, and RTLdongle and PLUTO and LimeSDRmini, SDRConsole etc...

    So most stations that call me OFF-frequency or trigger LEILA or have bad signals or bad behavoir in Pile-up

    have been using some homebrew complicated equipment capable of full-duplex....to be honest.


    So I think we should be more open and not argue for the "RULES" sake.


    BTW: Germany likes RULES - except on their highways-hi

    Jonathan,

    I appreciate ur work on MMDVM, but I am not sure abt ur statement:

    For example, DMR is originally not open and fully documented. Some things have been reverse engeneered. We all mostly use MotoTrbo Tier2, which is fully proprietary of Motorola (even with Hytera radios) and also your MMDVM is using a VOCODER-chip (AMBE), that you need to buy and use in hardware in order to have a license for it. So I cannot see any difference to Lora at all. So also Lora is fully documented and you can buy chipset for 433MHz very very cheap! So why not using it?

    73 de Mike

    Dear Peter,

    dear all,

    certainly LORA is fully legal to use in Amateur Radio in most countries. It is not encrypted. It might be proprietary, but C4FM, DStar, DMR P25 is the same in many aspects and still widely used in Amateur Radio Service. Lora-APRS is fully compliant with the APRS standard from Bob Bruninga, WB4APR. So in terms of "experimental" we should welcome these experiments. Ofcourse it is true that the bandwith will only fit the QO-100 wide band transponder. But I understand, that the wide band transponder is intended not exclusevely for DATV, but also for such data transmission experiments and services. Lora is a good example that not only very narrow banded modulation techniques (FT8, WSPR) can give excellent results with very low power but also "spread spectrum" type (see GPS).

    Currently LORA-APRS is spreading accross Europe on 433.775 on 70cm band (https://www.lora-aprs.at/) . WIth just 50mW you can make position data transmission over 100km from your car or backpack. So to have a Region1 APRS channel for Lora-APRS on QO-100 could be a super service also when travelling very remote areas in Africa or elsewhere...

    So lets welcome innovation in Amateur Radio!


    73 de Mike, OE3MZC