WELCOME TO STATION QRP

8W AM TRANSMITTER

6CJ6 SHORTWAVE TUBE TRANSMITTER

Despite modest power level this 8 watt QRP AM vacuum tube shortwave transmitter is capable of remarkable long-distance reception. Transmitter uses a 6BX6 crystal oscillator driving a 6CJ6 RF power amplifier to produce 8 watts of RF output power. Internal tube pre-amplifier, phase splitter and dual 6BW6 audio amplifier. Transistors?? Fuhgeddaboudit!
25W AM TRANSMITTER

GU-50 SHORTWAVE TUBE TRANSMITTER

Extraordinary solid design and build of powerful AM vacuum tube shortwave transmitter with 12BY7A crystal oscillator, QQV03-10 clamp stage and a single GU-50 amplifier tube in the RF output stage. Designed for dependable operation with components that remain readily available, this transmitter delivers strong AM signals for shortwave broadcasting.
75W AM TRANSMITTER

GU-50 SHORTWAVE TUBE TRANSMITTER

Bang for the buck with two Russian GU-50 tubes; powerful top-notch AM vacuum tube shortwave transmitter built around the rugged Russian GU-50 power tube. The transmitter uses a 12BY7A crystal oscillator, QQV03-10 clamp stage and two GU-50 in the RF amplifier. Design provides excellent stability, clean modulation, and reliable operation on shortwave.

PREVIOUS PROJECTS

50W AM Transmitter

Multiband (9.2x and 15.0x kHz) AM (high level anode and screen) tube shortwave transmitter with CV5121 oscillator, EL86 clamp and two 807 RF power amplifier tubes in parallel. Nominal output power 50 watts.
70W AM Transmitter

AM tube shortwave transmitter using CV5152 oscillator, PL84 buffer stage and two 807 RF power amplifier tubes in parallel. Audio low pass 220 Hz & high pass 5.5 Khz filter. Nominal output power 70 Watts.
35W AM Transmitter

Compact multiband (3.9x and 6.2x kHz) AM (100% mod, high level modulation system) tube shortwave transmitter using CV4055 oscillator and 6146W RF power amplifier tube. Output power a perky 35 watts.
200W AM Transmitter

High power AM tube shortwave transmitter design with 6BH6 oscillator, EL84 buffer stage, 6L6GT clamp and four 807 RF power amplifier tubes in parallel. Internal MOSFET amplifier. 200 watt output with ease.