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Low power AM transmitter plan for 400 uW output

While grazing through the issues over at American Radio History, searching for low power AM transmitter plans and schematics you can build, I found a rather cool low power AM  transmitter plan I'm excited to share.
     Here's a low power, low parts count, simple AM transmitter that would be easy to assemble... if you can find an old loopstick somewhere.
     A straight-forward, discrete component, fault tolerant schematic, this transmitter plan was taken from an old electronics projects volume from 1964.
     If you could find that old Miller 2002 loopstick, you could put the rest of the transmitter together in an evening and be broadcasting the following day! Information on the rare loopstick has been added to the end of the reading, so you can also make your own.

1 watt MW AM transmitter plans and schematic from

Ferit Akalin, from Izmir, Turkey deals with radios, TV's, transmitters, security electronic devices-the whole lot.
     Lately, Ferit has experienced great difficulties in receiving LW, MW and SW broadcasts because of excessive electromagnetic pollution - a problem many of us face around the world.
    To make it possible to continue to enjoy his vast collection of antique radio receivers Ferit built a simple MW transmitter to better demonstrate the capabilities of his radios.
     Ferit recommends this plan to radio hobbyists and to all those interested.
     You will find links to his plans and schematic on here:
     An amazing array of construction projects are still out there for the constructing!

Tuning in tiny radio stations

Very little has been written about the recreational broadcasting hobby and many sources come and go quickly. This unpleasant reality regularly sends your faithful blog editor running to the Internet Archive searching for backups.
     Most who visit the low power radio blog are interested in transmitting and broadcasting but some want to know how to tune in a local low power station. As noted above, little has been written about low power broadcasting and even less has been written about tuning us in.
     After searching deep archives of electronics magazines, four readings were found dated 1988, 1995, 2005 and 2006. Please to be enjoying this rare read, indeed, by reviewing the four articles posted below: For additional similar information on this blog, please visit and enjoy: Low power radio - in the air, everywhere and all you need to do is listen.

Low power, low cost and license free studio transmitter link or STL

While grazing through old issues of electronics magazines, looking for low power AM transmitter plans and schematics you can build, I found a handful of low power radio opportunities in different frequency bands.
     In this post we'll look at a the low power FM opportunity in the virtual low power FM transmitting playground known as the 49 MHz band.
     This tiny slice of spectrum from 49.82-49.90 MHz is described in a bit of light reading from the FCC titled PART 15, RADIO FREQUENCY DEVICES; Subpart C, Intentional Radiators; Sec. 15.235; Operation within the band 49.82-49.90 MHz.
The 49 MHz band is still used by some baby monitor manufacturers but most have moved up to the various ISM bands 900MHz/2.4GHz/5.8GHz. Fortunately, 49 MHz models are stil available new, in thrift stores or at baby monitors on Amazon and baby monitors on ebay.
Historically, this spectrum was once quite crowded. Back in 1978 a 49 MHZ radio club was formed for boosting the 49.820 - 49.9 MHz license-free CB walkie-talkie band set up by the FCC to get those kiddie toys away from 27 MHz where they were interfering with adult base and mobile stations.
     49 MHz gear is limited to a maximum of 0.10 watts of transmitter power and antennas up to only about one yardstick in length. The club was for public service, emergency work.
     This band was once crowded with walkie talkies and cordless phones but is now largely abandoned, perhaps providing an opportunity for a low cost, low power STL. A 49 MHz baby monitor won't have audiophile quality bandwidth but could be adequate for supporting an AM transmitter located some distance from its audio source.
     Connecting to monitor output to the transmitter input is pretty straightforward and here's a handy link for information on how to connect the audio source to the bay monitor transmitter for best audio performance.
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     Many of us remember those 1980s gadgets but if the 49 MHz era missed you completely, here are a few contemporary write ups:
Experimentation awaits on the underutilized 49 MHz industrial, scientific and medical (ISM) band!