HELLO GUYS,,I have a galaxy melaka EPT-360014B-- P.C.B
This radio has NO RX On AM, No Rx period No RX signal, No RX Audio
SSB RX seems O.K., Although i have not heard any tuned signals.
No one talks SSB in our area, So we have to wait for DX To talk SSB.
But i am picking up AM Override in SSB Mode O.K.
Next on AM TX the radio dead keys wide open 10+ watts with no
forward swing, and no modulation. In SSB Mode the TX seems alittle
low, but i do have TX Audio on SSB, but it only swings about 5 or 6
watts peak output on SSB. So far i did P.A. test and i have good
loud audio here..Also with the roger-beep and talkback on i can
hear the beep tone o.k. Although it does not show modulation/swing
on wattmeter,and you cant here it on the monitor radio.
So far i have changed TR-51,TR-50,TR-49,TR-52,,C-190,C-193
Out with new parts.Also i have checked all the diodes around the
Mod Amp Transistor, they check good..Also R-243 the big resistor
close to the Mod Amp Transistor gets extremely hot seconds after
you power up the unit.This radio had the N.P.C/ VOLTED FINAL MOD
Installed. But i removed this and put it back stock..Also i removed the
mirror board, but still same thing.R-243 still gets extremely hot, and
radio has NO RX on AM. What else could be shorted here that i am
missing..Thanks for any help given. B.T.W. I havent changed out
R-243 Yet,, but i checked it in circuit, and it seems to be O.K.
This radio has NO RX On AM, No Rx period No RX signal, No RX Audio
SSB RX seems O.K., Although i have not heard any tuned signals.
No one talks SSB in our area, So we have to wait for DX To talk SSB.
But i am picking up AM Override in SSB Mode O.K.
Next on AM TX the radio dead keys wide open 10+ watts with no
forward swing, and no modulation. In SSB Mode the TX seems alittle
low, but i do have TX Audio on SSB, but it only swings about 5 or 6
watts peak output on SSB. So far i did P.A. test and i have good
loud audio here..Also with the roger-beep and talkback on i can
hear the beep tone o.k. Although it does not show modulation/swing
on wattmeter,and you cant here it on the monitor radio.
So far i have changed TR-51,TR-50,TR-49,TR-52,,C-190,C-193
Out with new parts.Also i have checked all the diodes around the
Mod Amp Transistor, they check good..Also R-243 the big resistor
close to the Mod Amp Transistor gets extremely hot seconds after
you power up the unit.This radio had the N.P.C/ VOLTED FINAL MOD
Installed. But i removed this and put it back stock..Also i removed the
mirror board, but still same thing.R-243 still gets extremely hot, and
radio has NO RX on AM. What else could be shorted here that i am
missing..Thanks for any help given. B.T.W. I havent changed out
R-243 Yet,, but i checked it in circuit, and it seems to be O.K.
