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AF1 • 1
E - Z CW
AUDIO FILTER
Ramsey Electronics Model No. AF1
Here’s a quick and easy way to eliminate interfering CW
signals! This filter uses a digital bandpass filter to knock out
those unwanted signals. The adjustable center frequency and
switchable bandwidth add some versatility to this hard working
kit!
• Utilizes “state of the art” switched capacitor bandpass filter IC’s !
• Four selectable bandwidths - 750 Hz, 500 Hz, 250 Hz, and 100 Hz -
all with digital accuracy.
• Adjustable filter center frequency for convenient listening.
• Overload protected input accepts headphone or speaker level
audio.
• “Smart” power input allows for AC or DC operation.
• Audio bypass when unit is switched off - no need to disconnect
unit when not in use.
• Speaker and headphone level outputs with adjustable volume. No
need for an external audio amp.