Build a AM Transmitter, Project Info

Warning, HIGH VOLTAGE!
The tuning variable capacitor has about 200 volts potential, that's why I'm using a wooden knob!! Other parts of the transmitter develop over 600 volts potential. Use extreme caution while building and operating the transmitter.

My purpose is to transmit to the radios in my house this good quality audio.
If you're planning on running your own AM radio station the Ramsey kit model AM25 may suit your needs. Many schools and low power AM broadcasters use this transmitter. And in the USA low power AM broadcasters are required to have a license. The end user is responsible for complying with all FCC rules & regulations within the US, or any regulations of their respective governing body.


http://www.richardmcwhorter.com/AM_Transmitter/

Category:

Education

Tags:

• AM
• Transmitter
• Project
• Info
• engineering
• radio
• build

[joeypc87]

Hello AllAmericanFiveRadio,

According to the schematic diagram, I would like to know what the range of this transmitter will be when the maximum power switch is turned on and off ?

[AllAmericanFiveRadio]

@joeypc87

Low, covers most of the house. High, covers the house and a little outside the house. Ten feet maybe.

[48alfaone]

"Beautiful Transmitter"! Do you sell them? 

[AllAmericanFiveRadio]

Thanks 48alfaone

No, it is just a project.

[dwtees]

You mention the big coil wound on the oatmeal box is a choke. Would this function as the plate loading coil and if so could you briefly tell how to calculate its value for the 6L6. Are you operating class C?

[AllAmericanFiveRadio]

@dwtees

It is the frequency that is important, the AM band about 500-1700 KHz. In ohms I would not pick an RF choke less than 100K ohms, the higher the better, I would pick at least 1meg. Use the middle of the AM band and the ohms you want in a XL calculator to get the Henrys. All this choke does is to keep the RF from going into the power supply. The 6L6 is Class A. Google "XL calculator".

[AllAmericanFiveRadio]

@dwtees

Usually the formulas for the calculations are on the same page as the calculator.

[charlessmyth]

Great diagram :-)

[GMSamuelRhine]

@AllAmericanFiveRadio ok thanks

[AllAmericanFiveRadio]

@GMSamuelRhine

NO, just the house. If you want range, build my FM one transistor transmitter T2-3 T3-3