Re: ALC 100 and NO TX output (AFT5M31N) LDMOS
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Bonjour Scot
Find images of the radio.
when I compare the images
why is missing a (coil or capacitor) close to the coil and the 4700 resistor and the ldmos output
see picture 
 ?My RIG Picture
Could be a quality issue ?
Thank Real (ve2cuz)
[Edited Message Follows]
Real,?
No problem, I found the thermistor on the battery side (see photo).
I measures the voltage of the centre pin (Vout) at ~12oC and it was ~ 0.63V ... The supply to the Vin was 5V. I wamed the thermistor slightly and it changed to 0.67V - so it does work to some amount.
I read that the temperature coefficient of the thermistor is 10mV per oC so, at 12/13oC the coefficient would be 13X0.01V = 0.13. The 0oC Vout is 0.5V ... So... 0.5V + 0.13V = 0.63V ... this indicates to me that the thermistor is probably 100% working correctly.
Tonight I will check more scientifically and study the document of MC9700 and try to work out if the voltage at this temperature is correct or not but from the above it would appear to be fine.?
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Thank you for this valuable information Real! I had no idea the radio had this.
  
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