[Kenwood] Kenwood TS 940S
Bill Tippett
btippett at alum.mit.edu
Mon Mar 12 08:56:18 EST 2007
N4DSP:
>Does the 940S show three decimal places? Mine shows two and I believe my
930S showed three. Presently it has too fast of a dial ratio for weak signal
cw.
The following applies to the 930 but
may also apply to the 940.
http://www.radiomods.co.nz/kenwood/kenwoodts930.html
* The resolution of the main tuning digital readout can be
increased from 100Hz to 10Hz. No digits are lost since the readout
has the extra digit for this purpose. This change can be accomplished
by grounding pin 1 of connector 8 on the digital unit PCB.
* The tuning rate is 10KHz per revolution of the main tuning knob.
* The tuning rate can be changed to 5KHz per revolution by
removing or lifting one end of diode D-13 on the digital unit PCB.
* Note that the black marks on the tuning knob itself are exactly
500Hz apart. The knob can be "corrected" by tuning in an exact
frequency, such as 10,000.00KHz, 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 tuning modification above, the dial increments
become 250Hz per division.
* You may desire to switch the new 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 to make or break the circuit
on diode D-13. Another pssibility is to use the display DIM switch.
* There are an additional 8 memories available. These can be
utilized by grounding pin 5 of connector 7 on the digital unit PCB.
This lead is designated as "M3". The additional memories can be
selected by using the unused contac on the FUNCTION switch or by
adding a new switch.
73, Bill W4ZV
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