[Kenwood] Kenwood TS-940SAT S Meter

[MarioDaniele Greco]

Hi,
same "problem" here with my TS-940, one of the latest serial numbers, 9 Millionxxx. My S-meter moves only when signals are stronger than S5-S6.Some typical TS-940  issues are :- S-meter scale is calibrated according to Japanese scale, where S1 japanese = S5 in the  Collins USA signal scale.- there is a PIN diode attenuator, in RF board,  exactly after the RX input filters, before the RF cascode FET amplifier,  that could be out of calibration: the reference value is adjusted by VR1 in RF board. See service manual for the right values
- the input attenuator relays could have dirty contacts
Last, but not least, if your radio is very old, it could be necessary to check the whole RF-IF signal chain. The Service Manual is of help.
Just try this : switch to lower band, 500KHz - 1.5 MHz: if  the received signals or noise level is strong, and the S-meter goes to S6 or beyond, this means that the at least the signal chain is OK, otherwise it needs to be services.Hope this helpes73MarioIZ0IRH
     Da: brian tempero <btempero at stanford.edu>
 A: kenwood at mailman.qth.net 
 Inviato: Martedì 3 Febbraio 2015 18:19
 Oggetto: [Kenwood] Kenwood TS-940SAT S Meter
   
All,

This is my first post. I have a strange issue with my kenwood ts-940SAT.
Here is the issue:
My radio receives and transmits very well. The issue is that my S meter
barely works. If a really strong signal comes in the needle spikes and then
slowly descends. If the signal is not really strong the needle does not
move. 
When I transmit the needle works without issue in all settings (power, swr,
acl and so on).  I have all the knobs set per the operating manual for first
use. I am stumped at this issue.

Thank you for reading this issue and all comments or suggestions are
welcome.

Brian Tempero
HIVE Manager
Stanford University
650-724-8122


______________________________________________________________
Kenwood mailing list
Home: http://mailman.qth.net/mailman/listinfo/kenwood
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Kenwood at mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html