Summary of AM shortwave transmitter
The article introduces an 8 Watt AM shortwave QRP transmitter designed for educational purposes, emphasizing legal compliance and safe operation with a dummy load. It uses classic tube technology with an oscillator stage and a power amplifier. Most components are accessible via surplus suppliers or from old radio sets. Contact details for purchasing a ready-built version are provided through the Station QRP website. The transmitter operates at 300V and 300mA power supply.
Parts used in the 8 Watt QRP AM Shortwave Transmitter:
- 6BX6 (EF80) Oscillator tube
- 6CJ6 or 6DR6 (EL81) Power amplifier tube
- 300 Volt, 300 mA High Tension (HT) Power Supply
- Various components salvaged from old radio communication sets
IMPORTANT: The published circuit diagrams of Station QRP are for educational purposes only. These are offered for the furtherance of the readers’ knowledge regarding Radio Frequency design and principles. At all times during operation an assembled unit must be connected to a dummy load.
In most countries law prohibits the unlicensed operation of transmitters w hen connected to an antenna or even to have such equipment
present in a fully or partially installed state. All responsibilities for the ultimate use of the diagrams are bornesolely by the
builder and/or operator
8 Watt QRPAM Shortwave Transmitter Are you interested in building this 8 WattAM shortwave transmitter?
Most parts used in this transmitterare still available (e.g. Surplus Sales of Nebraska http://www.surplussales.com)o
r can be salvaged from old radio communicationsets. If you wish to purchasea ready-builtonec ontact me viawww.stationqrp.com for details. QRPAM Shortwave Transmitter Technical Data Transmitter: Tube(UK=Valve)
-Oscillator 6BX6 (UK = EF80) -Power Amplifier 6CJ6 or 6DR6 (UK=EL81) HT Power Supply:300 Voltsat300 mA
For more detail: AM shortwave transmitter
