hey rick please help on this galaxy 88 freq drift please
Posted: Friday 23rd Jan 2009, 5:52
Radio Make and Model: galaxy 88
PCB Number:
PLL Number:
Test gear available: vom,watt meter,dummy load,some electronics knowledge,soldering station.
Symptoms: cold weather drift
What is working: everything
What has been tried: resoldered one crystal so far
Did it suddenly happen ?: got it this way
Anything else that may be of help?: hey rick ,you seem very knowledgeable so i,m asking for your help on this .i bought a used galaxy 88.its in use in a mobile.its cold outside and i know these radios can drift a little but this is way outta hand .when you first turn it on cold the display will read say 27.187 on ch19...as it warms up it creeps back toward center but will actually pass center slot,when fully warm it will read 27.183 on ch19.i have to keep adjusting the course clarifier to keep it on freq.this is a total of 4kc of drift.this is excessive even for a export.
what i want to know is which crystal should i change out first?to see if its a crystal going bad problem??this chassis has 3 crystals ...a 10.240.....a 10.6975....and a 13.560....which one to start with for this problem???i assume its a crystal problem .
help!!!lol....thanks
PCB Number:
PLL Number:
Test gear available: vom,watt meter,dummy load,some electronics knowledge,soldering station.
Symptoms: cold weather drift
What is working: everything
What has been tried: resoldered one crystal so far
Did it suddenly happen ?: got it this way
Anything else that may be of help?: hey rick ,you seem very knowledgeable so i,m asking for your help on this .i bought a used galaxy 88.its in use in a mobile.its cold outside and i know these radios can drift a little but this is way outta hand .when you first turn it on cold the display will read say 27.187 on ch19...as it warms up it creeps back toward center but will actually pass center slot,when fully warm it will read 27.183 on ch19.i have to keep adjusting the course clarifier to keep it on freq.this is a total of 4kc of drift.this is excessive even for a export.
what i want to know is which crystal should i change out first?to see if its a crystal going bad problem??this chassis has 3 crystals ...a 10.240.....a 10.6975....and a 13.560....which one to start with for this problem???i assume its a crystal problem .
help!!!lol....thanks