The Defpom Forum, for RadioMods, S&M Software and Music by The Defpom

hadnt had a chance to do the headphone test yet.probably can get to it tomorrow.i checked tr25,tr27.and they appear to be open.i can get no contintuity on the v.o.m,,they are both c945q,and tr26 is a c1312f it appears to be good.no shorts,or open conditions.that is as far as ive got so far.i pick ba...

o.k. you were correct on the voltages,i rechecked tr28-and the emitter is 4.50 vdc,,the collector is 3.70 vdc.,,and the base is 1.37 vdc,,tr29 is e-1.37,,c-3.70.,,b-0.95.,,tr37 is e=3.25,c-2.50,,b-2.47..pin 6 of ic-3 is 7.40 vdc.also audio at p.a. jack is good.rechecked d-43 and i have it installed ...

o.k....the voltages are as follows..on one end of r152 the voltage is 8.34 vdc,,,on the other end of r152 the voltage is 4.50vdc...and the voltage on pin 6 of ic-3 is 7.40 vdc...there is no audio at tr26,,,but if you plug your ext.speaker in the p.a. jack you have audio,but it does not seem loud eno...

i removed tr27 and checked it.it checked good.,and the voltages are tr25-e-1.70--c-1.70---b-2.35,,,,,tr26-e-1.70--c-1.70---b-0.0,,,,,tr27--e-0.0--c-0.0--b-0.80---tr28,tr29,tr37...has no voltage on any leg..also tryed the radio with tr27 out of circuit..still no tx modulation.also traced the audio li...

so far i have checked tr25 tr26 and tr29 all three transistors checked good.the voltages at these three transsitors are as follows,,tr25-emitter-1.69 vdc.,base-2.38 vdc.,collector-1.70 vdc., tr26-emitter-1.67 vdc.,base-1.67 vdc.,collector-1.70 vdc., tr29-emitter-0.94 vdc.,base-1.35 vdc.,collector-3....

cobra 146gtl,with no tx audio,on am or ssb.the rx audio is fine.mic checks good on mic tester.parts changed so far,audio chip,balanced modulator chip,mic amp transistors,am regulator,final,driver,checked for loose connections found none.also changed tr42,tr43,tr44,tr45,tr46,tr28,tr29,c122,c123,d43.i...