Introducing the "PIXIE" micro-power amplitude telegraph transceiver—a small yet powerful kit that packs a punch! Despite its compact size and the limitations of a DC receiver, this 40-meter …

S-Pixie CW QRP Ham Amateur Shortwave Radio Transceiver 7.030 Mhz with Transparent Acrylic Shell Fully Assembled. This Pixie, assembled and ready to transmit, boasts a unique …

The rig is W7EL's Optimized QRP transceiver, from August 1980 QST, designed by Roy Lewallen. The rcvr sounds great, the xmtr has clean keying, and the output is 1.5 watts. The …

QRP-40 • 1 40 METER (7MHz) CW TRANSMITTER Ramsey Electronics Model No. QRP40 THE RAMSEY QRP-40 IS AN AMAZING PERFORMER THAT WILL WORK THE WORLD ON …

Power Requirements: 2.1 x 5.5mm coaxial plug, center positive. Receive: 10 to 16 VDC; reverse-polarity protection 15 to 20 mA. Transmit: 400 mA - 500 mA at 3.0 watts output. VFO …

ハムフェア2015自作品コンテスト 規定部門のテーマが『7MHz AM送信機』と発表されたとき、四十数年前に真空管 (6AR5)で7MHz AM送信機を自作して開局したことを思い出しました。 …

NS-40+ 5W 7MHz QRP CW Transmitter - $25 This classic kit had been offered by the Four State QRP group for many years, and finally retired. Now it is back, and better than ever!

An Optimized QRP Transceiver for 7 MHz Here is a rig that provides real challenge for the QRP home builder. Nonetheless, this is a classic circuit and a favorite in the QRP community. Even …

For a trip to the USA in June 1997 I have developed this little 40 meters transceiver. The receiver is a direct conversion receiver with a very good audio filtering. It is a real pleasure to listen to …

2007年1月2日 · The circuit of a 7MHz C W / A M QRP transmitter described here can be used to transmit either CW or audio frequency modulated signal over a 7MHz carrier. The carrier …