Elecraft Af1 Active Audio Filter

Elecraft AF1 Audio Filter - W8FGU

https://w8fgu.com/pics/enclosures/AF1/af1enclosure.pdf

Elecraft AF1 Audio Filter Enclosure by W8FGU Elecraft AF1 Audio Filter Mounted in the AF1 Enclosure (Courtesy of Ron D’Eau Claire). The AF1 enclosure is made of Lexan®, a polycarbonate, which is very strong. It also has a UV blocking coating on one side and was assembled carefully with this side on the outside of the enclosure.

Elecraft AF1 Active Audio Filter and Amplifier - QSY Society

https://qsysociety.org/2010/12/18/elecraft-af1-active-audio-filter-and-amplifier/

The Elecraft AF1 is a versatile audio filter that can be used with any receiver or transceiver. It can improve intelligibility of CW, phone, or data signals, and is especially well suited to radios that have inadequate I.F. or audio filtering.

Elecraft AF-1 Audio Filter Kit - QRZ Now

https://qrznow.com/elecraft-af-1-audio-filter-kit/

Elecraft AF-1 Audio Filter Kit. Posted date: ... Its built-in audio filter is relatively effective if the band isn’t too crowded but if I’m working a station and others pop up within a 1kHz on either side I have a real hard time keeping track of which QSO to listen to. I wanted some relief from the relatively porous audio filtering provided ...

Elecraft AF1 Active Audio Filter and Amplifier Demo.wmv ...

https://www.youtube.com/watch?v=9zTE-xEocO4

AF 1 Elecraft Aktive AF Filter (Kit ) - QRP-Shop

https://www.qrp-shop.biz/AF1

AF 1 Elecraft Aktive AF Filter (Kit ) * Filters: Variable Cutoff Low pass filter (SSB/CW) plus two levels of narrow CW bandpass filtering with tunable center frequency. * Built-in audio amplifier with volume control. * Dimensions: 5-1/2” L x 2-7/8” W x 7/8” H (14 cm x 7.3 cm x 2.2 cm).

AF1_Compatible Products – Elecraft

https://elecraft.com/collections/af1_compatible-products