iTx Tube AM Transmitter with Plug-In Coils (Kit)

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iTx Tube AM Transmitter with Plug-In Coils (Kit)

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Product Information

Tube AM Broadcast Transmitter Kit with plug-in Medium Wave coils

If you ever wondered how those early radio and wireless transmitters from the 1930's worked, then why not build your very own. Now your Vintage AM radio can play some OTR (Old Time Radio) programs as it did when it was new. With your CD, MP3, iPod, iPhone, or crytal microphone. This two tube transmitter becomes a miniature AM broadcasting station.

The set runs off 27 to 74 volts HT (3 or more PP3 batteries) and 1.4 volts for the filaments (1 D Cell). At 27 volts HT it is safe to build and use, even if you are not familiar with tube circuits, no nasty high voltages, it is a great way to learn a new hobby! If you want more power, then up the HT voltage, 36 to 45 volts (4 or 5 PP3 batteries) will provide a strong signal for around the house. Ideal to send AM broadcast signals to your Vintage Radio collection from MP3 player or similar.

Easy assembly

  • All the components are mounted on a high quality silk-screened fiber glass printed circuit board.
  • Medium Wave coil - has already been done for you! And simple to follow instructions with both schematics and wiring diagrams!
  • Optional Short Wave coil - based on simple Toroid design, with easy to follow instructions.
  • Two extra - blank plug-in daughter boards to experiment with your own coil designs.
  • You get a manual, all the parts including valve(s), sockets, jack plugs, tuning capacitors, coils, resistors, wire, nuts and bolts etc.
  • Complete with high quality silk screened printed circuit board.

You will need

  • Soldering Iron
  • Solder
  • Wire Cutters/ Stripper
  • Aerial Wire
  • Batteries (3 or more PP3 Batteries) and (1 D Cell), an optional Battery Eliminator is also available


  • Type: AM Modulation
  • Tube #1: AF Amplifier
  • Tube #2: RF Oscillator with screen grid modulation
  • Tuning: Capacitor solid dielectric
  • Audio: Mono or Stereo
  • PCB: high quality silk screened printed circuit board
  • Power 27 to 74 volts HT, 1.5 volts LT
  • Coverage: Broadcast Band /Medium Wave (MW) & Short Wave (SW)
  • Connections: Aerial, Earth, Audio Left Ch, Audio Right Ch

Optional Accessories

  • Battery Eliminator
  • SW Coil Kit (2-14MHz)

EU R&TTE directive and EMC Directive 2004/108/EC - in order to purchase this item, you must agree that:-

1. You intend to export the item to an address outside the European Union. Under no circumstances will this item be resold or put into service within the European Union.
2. The item will only be used within a completely RF screened and shielded metal enclosure or environment for testing, evaluation, experimental or laboratory purposes and any other use that does not radiate electro-magnetic waves into free space. I am not an unqualified end user and I have RF engineering and electromagnetic compatibility skills at my disposal.
3. For use by a Licensed Radio Amateur on 160M Band

Product CodeITX-MAX

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