QRZ! Ham Radio 21/QRZ Ham Radio Callsign Database - Volume 21.iso/MODFILES/DX375.TXT

Internet Message Format | 2002-01-23 | 2KB

From: "Garth Conover" <[e-mail]>
Subject: DX-375 Mute mod.
Date: Thu, 17 Jan 2002 12:10:21 -0500

The chief listed drawback to (un-modified) DX-375's is that they mute
excessively during tuning. Every time you touch any tuning control,
they mute for at least a second. You have to wait a second or more to
see if there is any signal on the frequency, and that gets old REAL
quick.

This mod will stop the annoying muting while tuning this Shortwave
radio


Remove the batteries and then remove the back cover by removing the 4
retaining screws. DO NOT remove the screw about an inch directly below
the whip antenna base! It holds the whip on. There will be a certain
amount of "fiddling" to get the back off due to the plastic section
that the volume control is inserted thru and other annoying "binding"
do-dads. Also, do not lose the tone switch plastic slide mechanism when
the back is removed. When the back is removed the rear of the main pc
board will be visible. Remove the 2 silver screws that secure this
board. Unclip the lower part of the board from the plastic clips. It is
not necessary to do this on the top side where the ferrite loopstick
is. Carefully lift the lower part of the board up until you can look
under it on the component side near the volume control. There are two
wire jumpers about a half-inch long with black sleeving on them that
are located on either side of a 9 pin SIP IC package (one of the audio
amps).!  They are parallel to the SIP package and run along each side
of the IC. These are the mute lines to each SIP audio IC. Carefully cut
both of them and you're done. Now put the thing back together and you
will find the tuning much faster and easier. Don't forget to replace
the silver screws on the main PC board and the tone switch slide
mechanism.


73     Garth     [e-mail]