Up one level Back to Home

A Fix for the Arcom Audio Delay Board By Ken Arck AH6LE html'd by Mike Morris WA6ILQ

Arcom reports that some RAD users have reported a "swooshing" sound when one first keys up.

We have a simple fix for this problem which requires replacing the 2.2 uf electrolytic capacitors (C1, C3, C5 & C8) with .1 uf non-electrolytics (i.e. non-polarized capacitors). The capacitors are clearly marked on the board's silkscreen and the new value is NOT .01uf but 0.1uf.

There was a concern that there would be a difference in the frequency response of the board, but there was none as the CODEC IC rolls off everything below 300 Hz. I measured absolutely no difference after the capacitor swap.

Back to the top of the page
Up one level
Back to Home

This page originally posted on 16-Aug-2006

Article text and drawing (the white background) © Copyright 2006 Arcom Communications
Artistic layout and hand-coded HTML © Copyright 2006 and date of last update by Mike Morris WA6ILQ

This web page, this web site, the information presented in and on its pages and in these modifications and conversions is © Copyrighted 1995 and (date of last update) by Kevin Custer W3KKC and multiple originating authors.   All Rights Reserved, including that of paper and web publication elsewhere.