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.

Stampfl Wave Block Features and Specifications:

- Frequency Range: 0–30 MHz

- Filter Bands (8 Frequency Ranges):

• 0–1.7MHz

• 1.7–2.5MHz

• 2.5–3.8MHz

• 3.8–6.0MHz

• 6.0–9.0MHz

• 9.0–13.0MHz

• 13.0–20.0MHz

• 20.0–30.0MHz

- Bypass Mode: Yes

- Insertion Loss: <1 dB

- Ripple: ±0.5 dB

- Dynamic Range: IP3 ≈ 50 dBm

- Display: TFT industrial display (480×272 pixels)

- PTT Control: (push to talk) RCA jack, PTT active GND

- Display: 480 x 272 pixel TFT industrial display

- Power Supply: 9–16 VDC, ~200mA

- Protection: Reverse polarity protection

- Housing: Solid aluminum enclosure

- Dimensions: WxHxD 7.48 x 4.72 x 12.20in. (190 x 120 x 310mm)

- Weight: Approx. 3.09lbs. (1.4kg)