AF1 Enclosure


The enclosure is constructed in a box fashion with the AF1 PCB mounted to the top panel. The top panel and lower box are secured together via Elecraft custom 2-D fasteners and black anodized 4-40 screws. The top contains the AF1 PCB mounted to it via standoffs. The bottom box contains the sides, ends and back of the assembly. Access to the inside of the enclosure is made by removing the four screws on the sides. Pulling the top and AF1 PCB straight out of the enclosure, allows for changing the battery or access to the PCB. There are four soft plastic feet mounted to the bottom of the enclosure to prevent the enclosure from moving around on a solid flat surface. The power LED is clearly visible in the enclosure and the knobs for the rotary switch and filter pots may be adjusted for uniform height just above the enclosure top. The power and audio jacks are accessed through holes in the side of the enclosure for each.

During initial installation, be aware that the enclosure has been designed with tight tolerances with regard to the internal size of the enclosure as it relates to the size of the AF1 PCB. Keeping the mounting hardware loose until everything is lined up will help make sure the PCB is oriented properly. There is enough tolerance built into the size of the mounting holes to allow for slight adjustments during installation and insure that all of the enclosure edges are square and seams tight.

It should be noted that two hole side of the custom 2-D fasteners are drilled slightly off center. The holes in the enclosure for mounting the 2-D fasteners are aligned so that the thicker side of the 2-D fastener is positioned at the outside edge of the enclosure half.

All mounting hardware is provided for mounting the AF1 into the enclosure as well as the externalized power switch. All parts are listed below:

•    4 – 7/8” hex standoffs
•    4 – 4-40 lock washers
•    4 – 4-40 1/4” screws
•    4 – custom 2-D fasteners
•    16 – black anodized 3/16” screws
•    Top of enclosure with standoffs mounted
•    Bottom of enclosure with access holes for power and audio jacks

The enclosure is shipped assembled with the 2-D fasteners and black anodized screws.

installation instructions

This introduction and complete installation instructions of the AF1 PCB into the enclosure can be found here.


AF1 Active Filter Enclosure

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