OM Power OM2501HF

OM2501HF manually tuned amplifier

The OM2501HF is a manually tuned radio-frequency (RF) linear amplifier for 1.8–29.7 MHz. Depending on revision, OM Power identifies FU728F or GU84B power tetrodes, four-electrode vacuum tubes. Confirm the actual equipment version before using operating or servicing instructions.

Operating modes and ratings

OM Power quotes 2500 W for SSB (single sideband) and CW (Morse), and 2000 W for RTTY, AM and FM under stated conditions. RTTY means radioteletype; AM and FM are modulation types. These are manufacturer ratings, not independently measured or legally permitted output powers. Drive and duty cycle must comply with the selected hardware revision’s documentation.

Tuning, SWR and electrical safety

Manual tuning requires adjusting the amplifier output network by the procedure specified by the manufacturer. Standing-wave ratio (SWR) indicates mismatch in the antenna feed system; avoid excessive reflected power. The high-voltage supply may remain dangerous after disconnection, so internal servicing calls for specialist knowledge.

Original sources and automatic alternative

See OM2501HF original specifications and the 4.61 MB English manual in the official library. Individual direct PDF URL not verified. The OM2501A is automatic and needs its own instructions.

OM Power OM2501HF manuals and documentation

Manuals and documents are linked when their source and relationship to this model have been verified.