STAMPFL HAM Electronics HF Preselectors

STAMPFL HAM Electronics Wave Block Preselectors

STAMPFL HAM Electronics Wave Block Preselectors are a precision-engineered RF filtering solution for the 0–30 MHz HF frequency range, designed to optimize receiver performance and protect sensitive front-end circuitry. Positioned between the antenna and receiver/transceiver, it employs eight switchable bandpass ranges to attenuate out-of-band signals, mitigating overload from strong sources such as AM broadcast stations. This results in a cleaner signal path and improved signal-to-noise ratio across the selected frequency range. Key features include low insertion loss (1dB), high dynamic range (IM3 ≈ 50 dBm), and ripple control within ±0.5 dB. The Wave Block integrates a 480×272 pixel TFT industrial display for intuitive operation, a bypass mode for full-spectrum pass-through, and PTT control via an RCA interface. Housed in a sturdy aluminum enclosure, the Wave Block operates on 9–16 VDC at approximately 200mA and includes built-in reverse polarity protection. Ideal for SDRs and wideband HF receivers, the WAVE BLOCK Preselectors ensures superior selectivity and guards against strong-signal environments.

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