From cbfsb!att!linac!uwm.edu!wupost!zaphod.mps.ohio-state.edu!uakari.primate.wisc.edu!usenet.coe.montana.edu!milton!oberem Wed Dec  4 22:44:23 EST 1991
Article: 11688 of rec.radio.shortwave
Path: cbfsb!att!linac!uwm.edu!wupost!zaphod.mps.ohio-state.edu!uakari.primate.wisc.edu!usenet.coe.montana.edu!milton!oberem
From: oberem@milton.u.washington.edu (Graham Oberem)
Newsgroups: rec.radio.shortwave
Subject: DX440 mod - how to
Summary: how to remove the chuffing from dx440/snagean803 radios
Keywords: anti-chuffing mod - dx440
Message-ID: <1991Dec4.163206.4247@milton.u.washington.edu>
Date: 4 Dec 91 16:32:06 GMT
Organization: University of Washington
Lines: 54

After my recent post in which I mentioned the anti-"chuffing" mod
for the Sangean 803 / DX440, I have had numerous requests for details
of it, so here it is.  If you like it let me know.  It worked great
for me.

Graham Oberem, N7UGT

--------------------------------------
		Sangean 803 / DX440 Modification
 
The following mod will remove the "chuffing" heard while tuning the
Sangean 803/DX440 radios.
 
WARNING:  a.	This operation will void your warrantee.
	  b.	You do this at your own risk.
 
1.	Place the radio face down on a suitable surface and orientate it so
	that the base of the radio is towards you.
 
2.	Remove the battery cover and take out the D-cells.  You do not need to
	remove the AA batteries but you will lose your clock and memories, so
	make a note of them before you go on.
 
3.	Remove the six screws which hold the back of the radio in place.  One
	of these is in the battery compartment.
 
4.	Lift off the back cover and swing it over towards your left to lay it
	down.  This is to avoid breaking off the wire going to the whip
	antenna.
 
5.	Locate the 8-wire flat cable which runs from the circuit board above
	the loudspeaker on your right horizontally across to the rf/if board. 
	The cable plugs into an 8-pin socket which is located almost dead
	center in the radio on the rf/if board.
 
6.	Carefully remove the cable from its socket.  Identify the second wire
	from your left in the cable.  (Second to last on the side furtherest
	from the loudspeaker.)  Bend this wire up and out of the way (or cut
	it off!) so that it will not plug back into the socket or make contact
	with the socket in any way.
 
7.	Carefully plug the cable back into the socket and check that the wire
	you modified is not making contact with the socket.
 
8.	Repeat steps 4 through 1 in reverse order and reprogram your clock and
	memories.
 
9.	Turn on the radio and enjoy the lack of "chuffing".  (You may still
	hear a "thud" while tuning across a strong station.)
 
Remember:  a.	This will void your warrantee but if done carefully it is
		reversible.
 
	   b.	Follow the above instructions at your own risk.