Chinese Linear Amplifier on Pair FU-250f tubes / 800-900W

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Chinese clone of  “ACOM-1011” or 1st of April joke? Specifications: Output power is about 800-900Watts (by Phase detection method). Two ceramic “FU-250f” Chinese tubes inside (analog of 4CX250). The heater voltage of Chinese “FU-250f” tube is 26,5 v AC. Bands: 160-10m The amplifier is lightweight, compact. Very suitable for mobile / Dxpeditions and home use.…

ACOM 1500 HF Linear Amplifier

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Information was exclusively provided to CQDX.ru by an ACOM. ACOM1500 is developed on the base of the well known ACOM1000. The tube GU74B has been replaced by 4CX1000A and the power supply is beefed accordingly. The RF power is  up to 1500 W. PEP output on 160 trough 6m Bands. Another improvement is the internal antenna…

New life of old SB200 Heathkit PA

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Nice WEB Site from AC0C that I Recommended. A lot’s of useful tips for old Heathkit “SB200” Linear Amplifier and additional DiY ideas and not just for PA stuff. Photo by AC0C I have loved RTTY since I was a young ham. Had a Western Electric RTTY machine in my bedroom as a kid. My…