IC28A.3

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.
[source: W9MKV]