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QRZ! Ham Radio 5
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QRZ Ham Radio Callsign Database - Volume 5.iso
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ts440.mod
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1994-11-12
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4KB
Date: Tue, 17 May 88 17:09 EST
From: <REID@IUBACS.BITNET>
To: MBRAMWEL@BUSINESS.UWO.CDN
Subject: KENWOOD TS-440 Mod
West,Gordon: "Kenwood 440 Modifications" _Popular Communica-
tions_, October 1987 p. 62.
Illustration captions:
1. Remove 17 screws holding on the bottom and top covers. The bottom
cover comes off, and the top cover is carefully removed and put next
to the radio. It is till connected via the speaker wire.
2. Gain access to the front of the unit by removing two top side
screws and loosening two bottom side screws. This allows the front
assembly to swing open.
3. Remove the shiny silver control board protection plate. This
requires removing two screws on the top and three screws on the
bottom. Lift the plate out completely.
4. Locate diode D-80 in the bottom left-hand corner. Snip it for
all-band transmit.
5. Now locate D-66 and snip. It adds 10 Hertz readout to your
digital frequency display.
6. Carefully reassemble the control plate using a magnetized tiny
screwdriver to hold the five tiny screws in place. Don't pinch any
wires. Also, close up the front and replace the top and bottom covers
with 17 screws.
7. Connect power. Depress A=B switch and turn on the power
simultaneously. This resets the microprocessor for all-band transmit
and 10 Hz frequency display.
This article also tells how to increase the power of the TS-440 by
adjusting the internal ALC control. The procedure is applicable to
other rigs.
--
Frank W9MKV
bitnet: reid@iubacs
arpa: reid@gold.bacs.indiana.edu
From: wa2ise@cbnewsb.cb.att.com (robert.f.casey)
Newsgroups: rec.radio.amateur.misc
#Subject: TS440 Q33 protection
Keywords: fix
Message-ID: <1991Dec10.045038.26685@cbfsb.att.com>
Date: 10 Dec 91 04:50:38 GMT
Sender: news@cbfsb.att.com
Organization: AT&T Bell Laboratories
Lines: 59
copied from packet:
Msg# TSF Size #Rd Date Time From MsgID To
8731 BF 1957 0 08-Dec 0343 KD2EJ 28523_WB2QJA INFO@ALLBBS ()
Sb: PROTECTING Q-33 ON TS-440S
SB-949
TS-440S PROTECTI 01/20/89
If pin 7 (RL) of the remote connector is accidently
connected to ground, current from the 14 volt line (14L)
will damage transistor Q33 on the IF unit. This will prevent
the radio from transmitting. To protect Q33, a 4.7 ohm
resistor should be installed in series with the RL line on
the foil side of the IF board. In the event that pin 7 is
connected to ground, the resistor will open, but the
transceiver will still be capable of transmitting.
REQUIRED PART:
4.7 OHM, 1/6 WATT RESISTOR ........ RD14CB2C4R7J
1Disconnect the power supply and antenna from the
transceiver.
2Using a #2 Phillips screw driver, remove the 9 screws
from the top cover of the transceiver. Remove the cover
and unplug the speaker wire.
3Locate connector 19 on the IF unit.
4Using a #1 Phillips screw driver, remove the 7 screws
that secure the IF unit to the chassis of the
transceiver.
5Pull the board up and rotate it towards the front of the
transceiver to expose the foil side of the board.
6On the foil side of the board, locate the trace that is
connected to pin 3 (brown wire) of connector 19.
7Using a craft knife, cut the trace comming from pin
three so as to open the foil trace.
8Solder the 4.7 ohm resistor across the now open trace
(i.e. in series with the trace).
9Assemble the transceiver by reversing steps 1 - 5.
This is an optional change that may not be covered under
warranty.
Time required for this modification is 0.5 hrs or less.
(C) 112188TKC
=====================================================================
Note: I haven't tried or verified this, proceed at your own risk. WA2ISE
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