Date: Wed, 18 May 88 10:25 EST
Subject: ICOM IC-28A AND IC-28H
To make the IC-28 transmit 138-174 MHz, cut D21 (no retuning
required). D21 is a tiny glass diode standing on-end near the center
of the upper circuit board, accessible by removing the top cover. The
IC-28 is the only convertible ham rig I know that covers the 170-MHz
federal government (including national park) frequencies.
Copied from the QRZ! Windows Ham Radio CDROM
the mods-i-k file section.