Amateur Radio Payload on Lunar-orbiting 4M-LXS To Transmit Messages from the Moon. Post # 4531.

Source:  TV Technology, dated 26 September 2014.

Reporter:  Doug Lung.

Comment:  Russ Roberts (KH6JRM).

Summary:  With the right equipment, you may be able to receive messages from the moon sometime late next month.

Article excerpts:

The Amateur Radio payload on the lunar-orbiting 4M-LXS spacecraft will carry up to 2,500 thirteen-character digital messages to lunar orbit for retransmission using the JT65B mode on 145.990 MHz.

The mission is scheduled to run slightly longer than eight days, with the lunar flyby occurring about halfway through the mission.  The orbiter is one of the bes models for Beijing‘s new lunar probe Chang’e-5, which will land on the moon, collect samples, and return to Earth.

LUXspace said the 4M spacecraft will transmit continuously on 145.990 MHz (+/- 2.9 kHz) at 1.5 W into a simple quarter-wave monopole antenna.  “Transmission is based on a 1-minute sequence and a 5-minute cycle.  The transmission will start 4670 seconds (77.8 minutes) after launch”.  You will need  the free WJST software to decode the signals.

More details are available on AMSAT UK’s 4M-LXS Lunar amateur radio payload web page and LUXspace’s Manfried Memorial Moon Mission (4M) website.



This will one of Beijing’s most ambitious space probes.  Luckily for amateur radio operators and short wave enthusiasts, the payload will carry an amateur radio transmitter.  I will try to receive these signals with a homebrewed loop antenna.  If the mission is successful, scientists should gain more knowledge of our nearest neighbor in space–our own moon.

For the latest in Amateur Radio News and Events, please check the blog sidebars.  These news feeds are updated throughout the day.

Thanks for joining us today!

Until next time,

Aloha es 73 de Russ (KH6JRM).

Dave Raycroft’s ICPO Bulletin, 22 August 2014.

Get ready for some good DX hunting over the next two months.

Source:  Southgate Amateur Radio Club.


The current update of Dave Raycroft’s ICPO (Islands, Castles & Portable Operations) is ready for download.  As usual, Dave has an exhaustive list of current and upcoming DX catches. Some of these portable operations are from relatively rare areas of the world.  Included in this list are operations from Tioman Island (AS-046), Svalbard (EU-026), Belodymovsky State Wildlife Area (WWFF UN FF-079), Hong Kong (AS-006, and Insula Fericirii (EU-191.  Have fun!  Aloha de Russ (KH6JRM).

See on Scoop.itKH6JRM’s Amateur Radio Blog

How to use an oscilloscope/What is an oscilloscope/Oscilloscope tutorial.

Excellent video from mjlorton.  A thoroughly understandable tutorial on the basics  of the oscilloscope, how it works, and how to use this versatile piece of test equipment.  Approximate length: 32 min, 01 sec.  This is worth adding to your reference library.  Aloha de Russ (KH6JRM).

See on Scoop.itKH6JRM’s Amateur Radio Blog

TVTechnology: A Look Back at Broadcast Engineering Magazine

TVTechnology Broadcast Engineering magazine was a long-time favorite of mine, with articles that challenged me to learn more about video technology, and advertising that was often as educational as the articles.

Source: Thanks to reporter David Hall for this fascinating look back at the early years of television technology.  “TVTechnology Broadcast Engineering” magazine was one of the better known publications addressing video issues associated with television.  David said the magazine was a favorite of his because the “articles…challenged me to learn more about video technology and advertising that was often as educational as the articles.”  Television certainly has come a long way over the past five decades.  Aloha de Russ (KH6JRM). See on Scoop.itKH6JRM’s Amateur Radio Blog

SKYWARN WARRIORS: Local ham radio buffs work front lines for National Weather Service

The National Weather Service has radar, satellites, Doppler, and double Doppler.
But even with all of that high technology, it still needs boots on the ground to know how the weather is affecting people.


An excellent public relations article by reporter Jack Minch, highlighting the contributions of amateur radio operators who are SKYWARN observers for the National Weather Service.  National Weather Service meteorologist Glenn Fields says, “A lot of our reports do come from amateur radio”, adding that “Ham Radios are good because they are battery powered and it doesn’t matter if the electricity goes out in a storm.”  This is another example of amateur radio operators helping their community in times of natural disaster. Aloha de Russ (KH6JRM).

See on Scoop.itKH6JRM’s Amateur Radio Blog

Copasetic Flow: Standing Wave Ratio, or SWR, A Ham Radio Exam …

The amount of energy reflected is determined by how well the impedances of the antenna, the transmission line, and the transmitter match. The reflected rf energy can enter the transmitter and damage the final radio frequency …


A nice, compact review (with questions) of the standing wave ratio (SWR).  This brief guide will help aspiring amateur radio licensees understand the workings of SWR.  Hamilton Carter (KD0FNR) reviews SWR test questions and highlights  the correct choices.  A good, general review for those  taking the Technician Class Amateur Radio License.  Aloha de Russ (KH6JRM).

See on Scoop.itKH6JRM’s Amateur Radio Blog

M1KTA’s QRP ham radio blog: Some antennas… and one of …

Some antennas… and one of SotaBeams Wirewinders. Now got the antennas all up. Had to put up the Union flag on the 10/12/25/17/20. Light house, 80m dipole (I can use almost vertical down too and bottom feed so it is a …


Nice discussion from M1KTA on the kinds of antennas he uses during QRP operations.  His blog also contains a variety of interesting articles, including the Elecraft KX3, the W3EDP antenna, a review of the Chinese Rock Mite QRP transmitter, a look at the GY560 frequency counter, and a photo essay on a lightning strike.  Aloha de Russ (KH6JRM).

See on Scoop.itKH6JRM’s Amateur Radio Blog


Wire Antennas for Ham Radio
Resource via YO3DAC / VA3IUL
#hamr #AmRad


Beautifully simple and clear descriptions of 230 proven antenna designs.  If you need an antenna idea, this is the site to check.  Great job by Iulian Rosu (YO3DAC/VA3IUL).  Antennas range from “Tee antennas” to a “Five element vertical log Periodic for 80, 40, and 20 meters.”  For details, visit  Aloha de Russ (KH6JRM).

See on Scoop.itKH6JRM’s Amateur Radio Blog

Tweet from @QRZnow

RT @QRZnow: Ham Radio Antennas #hamradio


A nice invitation to subscribe to QRZnow.  Check out this fantastic antenna arrangement.  Dream on…..Aloha de Russ (KH6JRM).

RI0F IOTA AS-062 in the log ! – F8DZY’s blog – “HAM RADIO only…”

Hi all, time flies and not a lot of things to log right now… Today I worked RI0F from IOTA AS-062 South Kuril Islands on 15M CW


Chris (F8DZY) has been busy working IOTA (Islands On The Air) stations, the latest being IOTA AS-062 South Kuril Islands on 15 meter CW.  Nice QSL card from this fairly remote island group.  Aloha de Russ (KH6JRM).

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