[Kenwood] Kenwood TS 940S

Sun Mar 11 20:49:26 EST 2007

Frequency displayed and tuning rate are independent. The 930 and 940 are 
both capable of displaying frequency to 10Hz, the synthesiser step 
size. On the TS930 you had to add a jumper on the digital A board, on 
the TS940 it is a switch under the top cover. This allows you to change 
from 100Hz readout, 1 decimal place, to 10Hz readout, 2 decimal places. 
That is how I read your question anyhow. Tuning rate is controlled by 
the number of pulses generated by the encoder and how the software 
handles them. In both the 930 and 940 there are speed up routines that 
come into action if you flick the vfo knob firmly causing the radio to 
rapidly move up or down in frequency. This assumes of course that the 
encoder is not out of alignment and is producing the right pulses. We 
have seen a few recently where they are so far out of whack that tuning 
up in frequency causes the frequency to decrease or vice versa. If you 
can, with careful tuning achieve 10Hz steps on the dial then that is 
what a stock radio does. I don't think the encoder rate changed between 
930 and 940 so they should be the same. Up and down buttons on some mics 
will give you discrete 10Hz steps.
Fitting a Giehl chip does give you the ability to change to a slower 
tuning rate on the 940, not sure if the Piexx 930 board had similar rate 
variability.
Martin, HS0ZED
n4dsp wrote:
> 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.
>> john-n4dsp
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