KITS
The Active CW low-pass filter for HF Receiver. Kit Diy | eBay
Four State QRP Group
The Active Low-Pass Audio Filter for Receiver (SSB 2.4 KHz or CW 1 KHz – RV3YF Amateur Radio Store
SCAF External CW Filter Full Kit
ElectroResales Active CW Filter KIT Filter is centered at 600 Hz | eBay
/i/565511/products/2018-09-07T21%3A27%3A29.463Z-CALF-H-FrontS.JPG?1606306133 "CALF the CW Audio Limiter Filter Kit from 3rd Planet Solar / KC9ON on Tindie")
CALF the CW Audio Limiter Filter Kit from 3rd Planet Solar / KC9ON on Tindie
OP Amp based CW audio filter kit | Another Electronics Blog
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Audio Filter for CW and SSB
Super CW Filter Kit with 1W Audio Amp $29.95
AF 1 Elecraft Aktive AF Filter (Kit ) - QRP-Shop
Building the “Toothpick” Audio CW Filter ‹ SPARKY's Blog
YouKits 500Hz CW Audio Filter For TJ5A
QRPGuys Active 600Hz Audio Filter - QRPGuys
OP Amp based CW audio filter kit | Another Electronics Blog
Buy Variable Bandwidth Filter Modules SSB/CW - Ham Radio Accessories | Amateur Radio Accessories and Equipment
Cumbria Designs T-1 SSB/CW Filter kit (4.9152MHz) User Manual | Manualzz
CW AUDIO FILTER SHOWCASE – QRQcw
K4ICY's Home Brew CW Audio Filter
TOOTHPICK
VEC-820K, KIT, SUPER CW AUDIO FILTER | MFJ Enterprises Inc
AF-1 Active CW filter KIT
Cokin X-Pro Series Infrared Filter Kit W1H0-27 B&H Photo Video
