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World of Ham Radio 1997
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WOHR97_AmSoft_(1997-02-01).iso
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ts830_8.doc
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1997-02-01
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TS830 Filter mod Pt 1
TS830.1 QRO mod
TS830.2 Amtor
TS830.3 Connectors Pt 1
TS830.4 Filter mod Pt 3
TS830.5 Connectors Pt 2
TS830.6 Filter mod Pt 2
TS830.7 Freq shift problem
WB4WOR - Users: 1 of 3>
DD TS830
TS830
here is an easy filter modification for the kenwood ts-830s. first to use
this mod, your rig need the yk-88c and to mak t even better, the yg-455c
installed. in short what we are going to do, is move around a 9 volt
switching voltage. this voltage comes from the af board, connector no. 7,
pin no. 5. its marked rlr on the schematic. this voltage ends up at
the pll assembly, connector no. 8, pin novp2. please do try this
modification by cutting in this circuit at he source, because this
same switching voltage feeds the if shiqo circuit, and the vbt circuit,
and the pll. so cutting the wire at the af board will make the pll
unlock when the mode switch is anywhere but in the cw positions. now
to te prtceires.
1. remove the top and bottom covers, and turn the radio upside down with
front facing you.
w2. locate the mode switch, and on the middle wafer set of contacts,
cut the white wire with the blue stripe. it is located next to
1the terminal with no conn ction, on the middle wafer set of contacts9)3-;3
about 1/4 inch ox wire on t switch contact, so youcan make a connection
there later.
SUBSCRIBER'S COMMENTS ON QRO MODIFICATION TO TS-830S, TS-530S
AND TS-530SP
I would like to pass on the problem I hace encountered in
connection with the QRO modification to the Kenwood radios
TS830S, TS-530S and the TS-530SP.
The problem occurs after many hours of long winded QSO's. It
seems that with the increase in the screen voltage from 210
to 300 volts, R37 on the RF unit (#X44-1360-00) heats up
tremendously and will change it's value so greatly that even
the receive either suffers or goes out totally. R37
originally is Metalfilm resistor at 3.3K ohms and is 1/2
watt.
I have changed mine to a Metalfilm as original same value but
have used a one watt resistor. The brand I was abble to get
was RCA and I suppose there are better on the market. This
is a 2% tolerance. Three units that I know of have had this
problem that I took care of in this area alone. Two units
were TS-830S and one a TS-530SP. Just thought I would pass
that information along for what it is worth.
6) This change permits automatic disabling of a linear amplifier during
full break-in cw operation. This is desirable since the relays in a
linear cannot properly follow each keyed character element. This change
should also be done if AMTOR operation is contemplated.
Assuming that your 930 has the aux. relay board in it, merely wire the
+28 volt lead to the relay coil in series with the extra contacts of the
"FULL-SEMI" switch.
7) For AMTOR operation, the T-R switching speed must be increased.
2 suggested changes are to remove C-500 (4.7uf) on the SIGNAL BOARD
(located top center near connector 30), and to ground the junction of
R-476 / Q-100.
8) In early units, the WARC band transmit was not enabled. If this is
the case, solder a jumper from pin 12 of IC-23 to ground on the DIGITAL
UNIT. (Ground can be obtained at pin 8 of IC-24).
9) Transmit can be enabled on all frequencies between 1.5 and 30 MHz for
MARS and transverter use by adding two jumpers on the DIGITAL UNIT:
Connect pin 9 of IC-11 to pin 12 of IC-21.
Connect pin 9 of IC-12 to pin 12 of IC-22.
Here is a chart of the connections to these connectors:
REMOTE (7 pin DIN) XVERTER (8 pin DIN)
1 Speaker output 1 Grd
2 Grd 2 +V out on xmit*
3 PTT 3 Grd
4 Q-22 out** 4 XVRT ON/OFF Control***
5 unused 5 Receiver input
6 ALC input 6 XVRTR ALC input
7 XMIT RELAY** 7 Xmit RF to xvrtr input
8 HF ant in
* A 12 volt, 50ma max. relay may be connected from pin 2
to ground. This relay will operate on xmit.
** Original units used Q-22 collector for linear amp relay
control. This did not work with low voltage relay systems
or those using a negative voltage. An optional relay board
(Now supplied in all units as standard) is available and
provides a normally open contact closure to ground at
pin 7.
*** Pin 4 is grounded to enable xvrtr operation. This may
be done by a switch in the transverter itself.
========================================================================
***->Be careful not to transmit out-of-band, or accidentally operate on
any non-amateur, unless you are authorized to do so.
DO NOT JEOPARDIZE YOUR LICENSE!
6. now from the remaining terminal of your new switch, connect and run
a wire to the if board to pins cw1-cw4. connect this wire to the green
wire, that is connected to one of these pins. you will then have two wires
connected to one of these terminals.
7. make sure tu have no solder shorts or bridges, make sure you have
taped or insulated any bare wire connections. mount new switch in one of
the spare holes on the baccof the radio. install the top aod bottom covers.
the modification works great, one position on the new switch and
everything isnormal, in the other position the cw filter is placed in-line
regardless of the position of the mode switch. to use the cw filters
on rtty/amtor i found i had to turn the if shift control ccw to about
the 9:30 position to center the tones in the passband. if you need an
even narrower passband, just tighten it up a little with the vbt.
good luck and good print!!!
========================================================================
Additional comments:
Even though the receiver low frequency end is spec'd as 150 kHZ, it will
operate down to 100 kHz. [A[BTo conveniently switch in a general purpose
receiving antenna you must use the transverter connector. When the 8 pin
DIN plug is plugged into this connector, a switch operates which
separates the coaxial antenna input from the receiver input. These two
connections appear at pins 8 and 5 resp. of the transverter connector.
(This 8 pin DIN plug is not furnished with the 930). The most
convenient setup is to bring cables from both the REMOTE and TRANSVERTER
connectors into a junction box which has appropriate connectors and
switches on it for interfacing to a transverter, receiving antenna,
linear amp, etc.
3. you will need a another switch, one with at least three terminals,
with the center teminal always in contact with one or the other of the
outside contacts. its best to use a toggle type so you can mount it in
one of the spare holes on the back of the radio.
4. splice into the wire removed from the moeoppcich, and connect
this wire to the center of your new switch.
o5. from one (you select) of the side terminals of the new switch,
connect a wire and run it back to the mode switch. connect this
wire to t tminalon the mode switchnrom which you removed the white
wire with the blue stripe. you did leave that 1/4 inch of wire didn't
you? take care here, the grey wire next to the one you are working on
carries 110 volts, so don't make any solder shorts!
If you experience an intermittent shift in display and operating frequency,
the cause will be a loose screw on the AF-AVR unit heat sink.
On the AF-AVR unit X49-1140-00, there are three self-tapping screws holding
the aluminum heat sink to the PCB. These also supply the ground connection
to that section of the board. Between the heat sink and the PCB foil, add a
tooth lockwasher at the two accessible self-tapping screws.
Procedure:
1. Remove the top cover (8 screws) and unplug the speaker.
2. Remove the bottom cover (8 screws).
3. Remove 5 screws holding the AF-AVR and swing the board over. Leads
do not have to be unplugged.
4. Add the two tooth-lock washers between the heat sink and the PCB foil.
5. To reassemble, reverse the above procedure.