galaxy 959 question

[doctor]

If anyone owns a 959, when you transmit for example on single side band the counter reads 27.385 on receive and when transmitting it reads 27.384..is this normal, people still hear me.. on am it doesn't change...curious


doctor/795

 

[Space Cadet]

Maybe not "normal", but "not unsual." Like most mass produced electronics, it's unlikely for it to be "spot-on". It just needs to be (re)aligned.

 

[hotrod]

this is very common with galaxy.sometimes it actually does change yor tx. freq
and sometimes it fdoesnt.if it dont then the counter is most likely not right,. but
if people say ya drifting or slinging off freq. then the radio needs aligned

 

[freecell]

all of these transceivers drift up to several hundreds of cycles from a cold turn on for the first 30 - 45 minutes. the temperature of the local environment also plays a signigficant role in frequency stability and accuracy. if you have no problems hearing or being heard during ssb operation and don't end up chasing stations all around the clarifier then there's nothing to worry about.

using the channel you mentioned as an example with ssb offsets of 1200 hz. the resulting lsb offset would be 27.3838 Mhz. and usb would be about 27.3862 Mhz.. the calibration of the display is separate of any tx offset adjustments and nothing indicated requires any additional tx alignment. the display calibration is temperature sensitive and in no way should be automatically construed to be an indication of off frequency operation if on the air reports indicate otherwise.

 

[GRTS]

It just needs a full frequency alignment.

 

[freecell]

all measurements are
taken at 26.965 Mhz.

transmitter alignment
http://cbtricks.com/radios/galaxy/dx959/dx959_trans_adj.htm

VR7 16.26750 MHz ±20Hz.

L23 10.69500 MHz ±20Hz.

L24 10.69250 MHz ±20Hz.

L25 10.69750 MHz ±20Hz.



pll alignment
http://cbtricks.com/radios/galaxy/dx959/dx959_pll_adj.htm

L20 16.27000 MHz ±20Hz.

L21 16.27250 MHz ±20Hz.

L22 16.26750 MHz ±20Hz.

in the absence of any evidence that any of these adjustments are not within stated tolerances the only thing necessary would be the following:

VC1 on Counter PCB
Adjust VC1 on counter PCB for correct reading on display.

only the ability to be able to make the measurements above after a 30 - 45 minute turn-on and confirm one or more readings out of tolerance would be any indication that a complete alignment is required. since it has been performed recently and if the above adjustments are within stated tolerances then the adjustment of VC1 is all that is called for.