153 lines
6.9 KiB
Plaintext
153 lines
6.9 KiB
Plaintext
|
|
|||
|
|
|
|||
|
|
========= MODS for KENWOOD TS-930 Transcievers ==========
|
|||
|
|
|
|||
|
|
The following is a list of favorite changes that can be made to the
|
|||
|
|
Kenwood 930. These changes are quite simple and do not require the
|
|||
|
|
addition of any switches.
|
|||
|
|
|
|||
|
|
NOTE: In the operator's manual supplied with the 930, there is an error
|
|||
|
|
on one of the drawings. On the upper left corner of the DIGITAL UNIT
|
|||
|
|
schematic locate connector 8. The lead designations are as follows (note
|
|||
|
|
that some of the designations do not appear on this sheet so you can add
|
|||
|
|
them to the drawing):
|
|||
|
|
|
|||
|
|
Pin Desig.
|
|||
|
|
1 100
|
|||
|
|
2 MU
|
|||
|
|
3 SCN
|
|||
|
|
4 M2
|
|||
|
|
5 MIN
|
|||
|
|
6 FSK
|
|||
|
|
7 B2
|
|||
|
|
8 FT
|
|||
|
|
|
|||
|
|
On the main drawing, called SCHEMATIC DIAGRAM, the pin numbers shown on
|
|||
|
|
connector 8 are reversed from the way they are numbered on the DIGITAL
|
|||
|
|
UNIT schematic. In the following changes, I am assuming that the
|
|||
|
|
numbering on the DIGITAL UNIT sheet is correct. In any event, it will be
|
|||
|
|
obvious which end is which since the end pin is vacant.
|
|||
|
|
|
|||
|
|
CHANGES
|
|||
|
|
|
|||
|
|
1) The resolution of the main tuning digital readout can be increased
|
|||
|
|
from 100 Hz to 10 Hz. No digits are lost since the readout has the extra
|
|||
|
|
digit for this purpose. This change is accomplished by grounding pin 1
|
|||
|
|
of connector 8 on the DIGITAL UNIT.
|
|||
|
|
|
|||
|
|
2) The tuning rate is 10 kHz per revolution of the main tuning knob.
|
|||
|
|
The tuning rate can be changed to 5 kHz per revolution by cutting one
|
|||
|
|
end of diode D-13 on the DIGITAL UNIT.
|
|||
|
|
|
|||
|
|
(Note that the black marks on the tuning knob itself are exactly 500 Hz
|
|||
|
|
apart. The knob can be "corrected" by tuning in an exact frequency, for
|
|||
|
|
example 10,000.00 kHz, pressing the DIAL LOCK switch, then turning the
|
|||
|
|
knob to line up a black line. As long as you don't spin the dial too
|
|||
|
|
fast, it will track nicely from one end to the other. With the slow rate
|
|||
|
|
modification, the dial increments become 250 Hz per division).
|
|||
|
|
|
|||
|
|
You may desire to switch this reduced tuning rate on and off. For
|
|||
|
|
example, you can select the new rate on just VFO B by using an unused
|
|||
|
|
section of the "FUNCTION" switch. Another possibility is to use the
|
|||
|
|
display "DIM" switch.
|
|||
|
|
|
|||
|
|
3) There are an additional 8 memories available. These can be obtained
|
|||
|
|
by grounding pin 5 of connector 7 on the DIGITAL UNIT. (This lead is
|
|||
|
|
designated "M3").
|
|||
|
|
|
|||
|
|
The 8 additional memories can be selected by using an unused contact on
|
|||
|
|
the "FUNCTION" switch.
|
|||
|
|
|
|||
|
|
4) Each group of 8 memories can be scanned at a rate of about 1 per
|
|||
|
|
second. Unlike a normal scanner, The unit will not stop scanning when a
|
|||
|
|
signal is present, but it is a good way to search favorite frequencies
|
|||
|
|
for activity.
|
|||
|
|
|
|||
|
|
A method of turning on the scan function without affecting normal switch
|
|||
|
|
functions would be to wire the unused section of the DIAL LOCK switch in
|
|||
|
|
series with the unused section of the METER switch (meter switch in the
|
|||
|
|
"VC" position).
|
|||
|
|
|
|||
|
|
5) A handy option is to be able to momentarily unlock one VFO when the
|
|||
|
|
DIAL LOCK is on. This can be useful during split frequency operation
|
|||
|
|
when you want to keep the receive vfo locked (the DX station's xmit
|
|||
|
|
freq), yet quickly qsy to the frequency he is listening to with your
|
|||
|
|
transmit VFO.
|
|||
|
|
This change can be made by wiring one lead from the DIAL LOCK switch in
|
|||
|
|
series with extra normally closed contacts of the "T-F" switch.
|
|||
|
|
|
|||
|
|
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.
|
|||
|
|
|
|||
|
|
========================================================================
|
|||
|
|
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.
|
|||
|
|
|
|||
|
|
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!
|
|||
|
|
|
|||
|
|
|
|||
|
|
[EOF]
|
|||
|
|
|