galaxy dx-44 no receive or modulation

[tim_spur]

have a galaxy dx-44 the receive went out in it also noticed around the positive and negative rf chokes where power goes to the board was burnt looking around that area replaced the power chokes put a new audiochip in still have no audio no modulation it will deadkey but not swing also the pa doesnt work can see the needle move when people talk have seen where tr-51 could be bad if so where could i get a new one and whats that part number is there anything i should check hope somebody can help me

[marveylus22]

http://cgi.ebay.com/Galaxy-Connex-RCI-2 ... dZViewItem

[marveylus22]

http://www.electronix.com/catalog/produ ... s_id/15566

[tim_spur]

thanks for the info do you think the tr-51 transistor is bad

[ramblingman]

hello,there.tr-51,2sb754 is the voltage regulator.my opion is this is probably not bad.usually when this goes,you will have no carrier on am.it will still transmit on ssb o.k.,and receive and modulation is usually still good.if it was accidently hooked up backwards and burnt out the chokes,id be looking in the area of the capacitors around the audio chip area.id check c-129,c150,c151,c152,c145,c146

[tim_spur]

ok can you check them with a ohm meter if so what should you get for readings

[ramblingman]

hello again,to check the capacitors youll have to pull them from the circuit one by one,and youll need a capacitance checker.to too if they are correct capacitance.you can check them for short,just like a diode or resistor.just put your v.o.m on x10 ohm,and make sure there not reading full scale (short),thet should just bum the meter allitle and fall back.you should also should see some signs around a bad capacitor,some times if they blow the bottom pops out.other signs like a powerey residue at bottom of cap.