PUBLIC NOTE (June 2021)

Given the notes issued in blogs and press, and all the controversy generated, we inform that at no time did we condone with mockery or irony about the entities that permeate amateur radio in Brazil.

We consider the performance of these entities to be extremely important as maintainers of good order and encouragement to practice. Our objective is unique and exclusive to expand the possibilities of freedom, inclusion, social justice, reduction of differences and economic dissipation through technology, whatever it may be.

We ask the entire crypto community not to attack anyone with comments or offenses, as the success of proposals aimed at improving society depends solely and exclusively on uniting all sectors of society in harmony.

To Labre, our sincere apologies for any inconveniences involving heated discussions with our supporters and community, and we ask once again to all to respect the radio amateurs who raised questions about the fact and to contribute to the harmony between the parties.


The dictatorial control of bigtechs and Internet surveillance undermines basic constitutional principles and injures individual freedoms. One of the solutions to give bitcoin more flexibility, was proposed by Nick Zabo, in 2017 at the Scaling Bitcoin - San Francisco conference, to send bitcoins by radio waves.

Several successful attempts have already been made in this field, most of them dependent on expensive or sometimes very limited equipment (e.g. GoTenna), specific atmospheric conditions to achieve long mileage (HF), among other physical and technological limitations.

Imagine that you are without an Internet connection, in an isolated region and without communication. A small HT radio, a cell phone, or notebook with a bitcoin wallet, and a few meters of copper wire to mount a dipole antenna is what you will need to trade your coins freely, across the planet. But, what if the other person who is going to receive it has no knowledge of radio amateurism and electronics? How will them receive that signal? How it will replicate on the bitcoin network this transaction that now flies through space at the speed of light. intends to use radio amateur radio to listen to these sent transactions and replicate them on the network. There are several modalities of transceivers and receivers of different frequencies and signals of communication on land and orbiting the space. If you want to know more, we advise you to visit the website: AMSAT.ORG. There you will find an updated list with different types of satellites and their orbits. Our biggest task is to organize all these possibilities in a logical and functional way, like satellite tracking, availiability, frequencies ... and stablish as many listenners and broadcasters around the world as contributors, so that anyone in any part of the globe can send a transaction to our listening centers spread across all continents.

Thus, regardless of whether the other party has knowledge of the area or not, we will perform this service automatically and for free. A "listening" protocol will pick up the signals from these global transactions that are sent to the satellites reported on the page (each with its settings) and just wait for confirmations. In addition, it also creates an extra layer of anonymity for the transaction, since it is not replicated by the issuer on the Internet.

Several technologies can be used in these experiments, ranging from simple transactions using low cost HT´s (25-50usd) and home antennas, even cutting-edge micro waves equipment and special high-gain antennas for communication satellites.

Thanks to everyone who supports and supported us. And one especial thanks to our "Professor Sparrow" for his patience in transmitting his knowledge masterfully, our gratitude to Narcélio Filho, André Alvarenga, Paulo Jr. e Rafael Oliveira for participating on these first experiments.

[73] Marcio Gandra PX4I6629



To enhance human economic and communication freedom, a group of radio amateurs and crypto enthusiasts are developing a platform for sending bitcoin and other cryptocurrency transactions using radio waves and explore E.M.E. reflection. The project is under development in experimental mode. In addition, the project will have an active QAP VHF channel for radio amateurs to answer their questions about bitcoin, blockchain, receive scam alerts, in addition to conducting rounds and QSO on the topic. As it is a subject that has not been explored yet by the new generations, the group is also willing to create an educational area to guide newcomers in the art of electronics and amateur radio., in few words, is a radio/crypto ecosystem that will work together with many radio amateurs around the globe, called LABS "listeners and broadcasters" for broadcasting bitcoin radio transactions in a new protocol. proposes much more interesting alternatives for communicating and sending cryptocurrencies over continental distances, This, without compromising their security and anonymity. The motivation is behind the idea that, although the internet can and is being controlled and censored, it is not the only tool to be employed in sending Bitcoin transactions and communications from one side of the globe to another on the planet.


The LABS Network experimental program from allows you to be a listener and broadcaster of bitcoin transactions over the radio. Once a transaction is signed and encrypted, you only have to be tuned to the listed frequencies, "listening" via software to the encrypted signals emitted to relay them on the network.

To automate the process, a special listening software is under development. It will allow the LAB agent to monitor the progress of its station, without any extra manual work to broadcast them when received.

The program is free and formed by volunteers who facilitate the sending of transactions through waves in the air. It is adviced to check the laws in your country about how you can operate radio frequencies there before joining us on this protocol building.

Those who want to join us, please send an email to . For legal reasons, only radio amateurs with a call sign, registered with the amateur radio competent entities, may operate on radio frequencies legaly. If you do not have it, but still want to contribute to the project, there are several other tasks that we will be pleased to assign.

Important to remember that it is still in development, not in use, and should be approved first by authorities, before release the protocol.



The use of the Moon as a passive communications satellite was proposed by W.J. Bray of the British General Post Office in 1940. It was calculated that with the available microwave transmission powers and low noise receivers, it would be possible to beam microwave signals up from Earth and reflect them off the Moon. It was thought that at least one voice channel would be possible.

In the English literature, which has also become known in German-speaking countries, it was always assumed that the first EME was done in the USA. But according to reports by Dr. Ing. W. Stepp in the "Der Seewart" magazine, it seems that already in 1943, during experiments with radio measurement equipment, (radar) reflections of the moon were received and recognized as such. Since so far nothing was published about this in cq-DL, the report by Dr. Stepp is presented here as a preamble to the activities of German VHF amateurs. It has been translated into English by Pieter-Tjerk de Boer, A.K.A PA3FWM.

Dr. Stepp writes:

In 1943 Telefunken had taken up the task of developing radio measuring equipment for detecting and surveying targets near ground -- ships, low-flying aircraft, cars -- with as large a range as possible. The task of locating near-ground targets especially required, besides high power and high receiver sensitivity, wavelengths as short as possible. A setup with the following parameters was developed, matching the possibilities of that time: Transmitter impulse power 120 kW ; Impulse duration 1.5 µs ; Wavelength 53 cm, about 564 MHz ; RX sensitivity 12 kTo ; Antenna surface 45 m2 ; Polarization horizontal ; Number of dipoles 8 per row horiz., 80 per column vert. [Translator's note: presumably the 12 kTo sensitivity means the receiver's own noise is 12 times thermal noise (Boltzmann's constant k times absolute temperature To), which is equivalent to a noise figure of 11 dB.]

The antenna could be rotated around its vertical axis. It was strongly focused vertically with the first nulls 1.3° away from the horizontal main lobe. The device was given the name "Würzmann". For testing, the system was set up in late 1943 on the Bakenberg on the south of the island of Rügen. The measurement results confirmed the calculated ranges: ships of average size were detected up to the horizon, about 50 km, and airplanes till 1000 m high up to distances of about 100 km. But with favorable weather conditions the system detected targets in the harbour of Gdansk and the Gulf of Finland.

After the first tests I assigned Willi Thiel, one of the very competent engineers, to take care of the equipment on his own and continuously perform observations. Some weeks later I again travelled to the Rügen island for experiments near Göhren. On the last day of the experiments, just a few hours before leaving back to Berlin, I visited the Bakenberg again. The sky was very dull, the night very dark. On the way to the Bakenberg W. Thiel reported about a "strange equipment perturbation", which he had observed on the previous day at approximately the same time, but of which he had not been able to find the cause; however, it had become less after about two hours despite him not fixing it, and in the end had disappeared completely.

After activating the Würzmann, I made the following observation: the "perturbation" again appeared, had a duration of several impulses, and larger impulse strength than the strongest nearby targets. It didn't appear until about two seconds after switching on the transmitter and disappeared (pulsatingly) correspondingly later after switching it off. But the rest of the echo image appeared and disappeared at the instance of switching the transmitter on/off. The "perturbation" only occurred when the antenna was aimed to the east, and it disappeared immediately upon a major change of direction, but reappeared only about two seconds after rotating back to the original direction. Apparently we had detected the rising moon behind the clouds with the equipment. I explained the gradual disappearance of the impulses by the reflecting body slowly moving out of the strongly focussed, horizontally aimed beam, as it rises above the horizon. Soon after this, the equipment was put into regular use, and I haven't heard about further observations.

It was not until the close of World War II, however, that techniques specifically intended for the purpose of bouncing radar waves off the moon to demonstrate their potential use in defense, communication, and radar astronomy were developed. The first successful attempt was carried out at Fort Monmouth, New Jersey on January 10, 1946 by a group code-named Project Diana, headed by John H. DeWitt. It was followed less than a month later, on February 6, 1946, by a second successful attempt, by a Hungarian group led by Zoltán Bay. The Communication Moon Relay project that followed led to more practical uses, including a teletype link between the naval base at Pearl Harbor, Hawaii and United States Navy headquarters in Washington, D.C. In the days before communications satellites, a link free of the vagaries of ionospheric propagation was revolutionary.

The development of communication satellites in the 1960s made this technique obsolete. However radio amateurs took up EME communication as a hobby; the first amateur radio moonbounce communication took place in 1953, and amateurs worldwide still use the technique.


History proves to us that in times of crisis the industries of creativity and ingenuity are the most prosperous. The Covid-19 pandemic has brought to light several concerns regarding human freedom. Politicians around the world have used and abused power, people have been stunned, various constitutional rights have been torn apart, honest people have been violated in their right to put food on the table, families have been torn apart, without any reaction being sketched out. Except for those who were willing to break the limits of air and land to achieve what they long for: full freedom, to think, talk, come, go and, why not, send bitcoins.

Bitcoiners, developers and amateur radio enthusiasts, Márcio Gandra, Rafael Silveira, Narcélio Filho, André Alvarenga and Paulo Jr. carried out an unusual experiment from April 24 to 29th. They retransmitted, in morse code, the decimal hexa of a PSBT file, of a multi-signed Bitcoin transaction, to be signed in another state of the country and replicated on the network to be mined. Until then, it would have been just a common long-distance radio transmission, if it weren't for one particular feature: the data would have hit the lunar surface and be refracted back to earth. Technique known in amateur radio as E.M.E (Earth – Moon – Earth) or “Moon Bounce”.

The date chosen for the event took into account an event that occurs only twice a year, “Lua Rosa”, a time when it is closer to the earth, favoring the success of the technique. For the emission, high-power radios with linear amplifier were used, in addition to directional antennas with high sensitivity and gain. The transaction sent from P2P André Alvarenga to Narcélio Filho needed 2 signatures to be completed, the two signatories of the transaction: Rafael Silveira and Paulo Jr. were more than 600km away, making direct transmission in a straight line impossible with the equipment used, but totally possible if they had the lunar star as a “mirror”.

The experiment was part of 2 projects: The launch of the project, a group of radio amateurs located in several cities around the world that will serve as 'listeners & broadcasters' of bitcoin transactions via radio, as a way to increase freedom and face up to the control and censorship we live in today. According to the project's creators, Márcio Gandra and Rafael Oliveira, the LABS, as the participants are called (acronym for listeners and broadcasters), will use their own software that will identify bitcoin transactions, convert them and replicate them on the network automatically. All registered amateur radio with knowledge of cryptocurrencies will be able to join the project on a voluntary and non-profit basis, which is supported by donations from its members and future participants. The group also intends to create an NFT with the audios and files from this historical record as part of the financing for the acquisition of larger and more powerful structures to expand the project.

It took 3 months of intense preparation to accomplish the feat. From testing and obtaining the license for amateur radio, through studies of electronics, radio waves, acquisition of equipment, construction of antennas, to encoding, decoding, reception and transmission in morse code, in an experiment known as "Moon Bouce" or Lunar reflection.

The transaction was sent from Belo Horizonte to the city of Macacos-MG, where it received the first signature and then was heard in São Paulo state, more than 600km away from the place of origin. With the audio file in hand, it was possible to recode morse to hexadecimal, then from hex to binary again, and process the PSBT file in the electrum wallet, closing the last outstanding subscription, all using free online software.

In addition, the group did a second broadcast playing the lunar solo teasing Elon Musk, where it was said: "Elon, we did it first!" to show that you don't have to be some eccentric billionaire to push the boundaries of the earth in search of freedom.

Legal doubts : Bitcoin protocol is not encrypted message as it seerms to be, its a public and auditable protocol, the transaction file can be read by anyone. There is no profit or commercial activity in this experiment. This experiment can be done with all kind of files such as photos, climate images and any other files.

The network is an experimental work that requires authorization to run in your country. is not operating .

Technical doubts : According to some ham operators it is impossible to work with Yagi antennas and less than 1000W of power. This info is not true and you can find hundreds of examples on youtube and Internet. Below you can find some videos that inspired us on this quest.

Positioning Antenna
Márcio Gandra - Tests wih Yagi 15db Doubled Dipole Antenna. Yagi Array + Low Loss Band-Pass Filter . Cubic SDR . Text to Morse and Hexa to Binary Softwares . Wallet : Electrum (PSBT Transactions) You can read more details about E.M.E. using low setup and power at and . Below you will find more info about the process.
E.M.E. Moon Bounce


Morse Code Transaction Sample . PSBT Transaction sent . Hexadecimal . Distance Map . Video and Audio Samples

Transaction Link:



Procotol under development - the goal is to create a new radio protocol with crypto transactions metadata to be used at all ranges of allowed frequencies and modes (digital and analog). After that, the protocol will be presented to amateur radio entities and communications agencies for approval and improvements. Join us if you are a radio software developer and programmer.


Most hams think it takes a big antenna and high power to work EME. This presentation will change that impression by showing examples of how little it takes to make a QSO off the Moon. A single Yagi and 50 watts will get you started. It will start with a little history and then cover all important aspects of EME needed for success.




List of Radio Satellites:

Best satellite frequency list:

Paul Andrews, W2HRO, re-entered amateur radio, after a 35 year break, by working FM satellites with a Yaesu portable and a dual band antenna. Experimentation with a simple moon bounce array led to bigger and better antenna arrays, power amplifiers, low noise pre-amplifiers, higher frequencies, and more QSOs. Listen to the PODCAST

More about bitcoin payments



WSJT-X, WSJT, MAP65, and WSPR are open-source programs designed for weak-signal digital communication by amateur radio. Normal usage requires a standard SSB transceiver and a personal computer with soundcard, or the equivalent. SDR-style hardware including the SDR-IQ, Perseus, SoftRock, and FUNcube Dongle is supported by MAP65 and WSPR. SimJT is a utility program that generates simulated signals for test purposes. All of the programs are available free of charge, licensed under the GNU General Public License. Installation packages for WSJT-X are available for Windows, Linux, and OS X

WSJT and WSPR have Windows and Linux packages, and MAP65 and SimJT are Windows only. For further details about source code and operating systems, see the Program Development page.

WSJT-X ("Weak Signal Communication, by K1JT") offers specific digital protocols optimized for EME (moonbounce), meteor scatter, and ionospheric scatter, at VHF/UHF, as well as for LF, MF, and HF propagation. The program can decode fraction-of-a-second signals reflected from ionized meteor trails and steady signals more than 10 dB below the audible threshold. WSJT-X incorporates nearly all popular capabilities of programs WSJT and WSPR, while adding comprehensive rig control and many other features. Check the WSJT-X page and links therein for details about modes FT8, JT4, JT9, JT65, QRA64, ISCAT, MSK144, and WSPR.

WSJT is the original program, first released in 2001. Version 10 implements modes JTMS, FSK441, FSK315, ISCAT, JT6M, JT65, and JT4.

MAP65 implements a wideband receiver for JT65 signals, optimized for EME on the VHF/UHF bands. It can be used together with Linrad (by SM5BSZ) or with direct input from a soundcard or FUNcube Dongle. The program decodes all JT65 signals in a passband up to 90 kHz wide, producing a sorted band map of decoded callsigns. In a dual-polarization system, MAP65 optimally matches the linear polarization angle of each signal, thereby eliminating problems with Faraday rotation and spatial polarization offsets.

WSPR (pronounced "whisper") stands for "Weak Signal Propagation Reporter." This program is designed for sending and receiving low-power transmissions to test propagation paths on the MF and HF bands. Users with internet access can watch results in real time at WSPRnet. Version 2.11 of WSPR includes FMT, a package of command-line utilities that can help you make highly accurate frequency measurements without expensive laboratory equipment. The WSPR mode is now included in program WSJT-X.

SimJT generates JT65 and CW test signals with user-specified signal-to-noise ratio. It is useful for testing the JT65 decoder and the relative capabilities of these two modes.

©2001-2020 by Joe Taylor, K1JT ORIGINAL DOWNLOAD AT





If you want to join to become a LAB, contributor, or just interested in knowing more, kindly send an email with your legal Amateur Radio ID  to , we will provide you all steps that you need to become a LAB member and start to develop this project with us.
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