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  1. T

    2sc945aq

    Thanks, that was pretty much my thoughts in a nut shell, but better to ask and learn...
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    2sc945aq

    Can someone tell me what type of differences do the different letters designate. 945AQ? 945A? 945LQ? Are they quality control notes? I ordered 945AQ's and got 945A's. I'm replaceing TR-26 in a 8719 Madison, if it's audio grade vs switching grade or something like that, I'll order new ones...
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    MV13YH

    Thanks a ton guys, that's the type of explanation that makes a guy feel comfortable following someones advice, Nomad, I may have read that other post at one time, reading this one rang a bell in my head... thank you both, with any luck I'll be aligning a lightning struck President Washington...
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    MV13YH

    I was kinda hoping Exit 13 or somebody was gonna chime in here. Looks like RFParts is carrying the transistors again, not sure where they're getting them from, but at $18 a pop, i'm leary to experiment. I have a couple chassis I could pull one from to take measurements, might be a last resort...
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    MV13YH

    In a nut shell that's what I thought I had read a few years ago. So before I do it, and find out otherwise, cause as we all know these Mitsubishi outputs are like gold, Bob85 , you are saying 2 diodes, are we still talking 4148's, or are you just saying it takes more than single diode. I have...
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    MV13YH

    So you used a 1n4148 in place of the MV13yh, I've heard of a 1n914 in place of the MV1y, but thought there was some series of components for the MV13yh
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    MV13YH

    I'm quite sure this has been brought out several times, but it doesn't seem to have its own spot, so here goes. Hopefully someone has figured it out. Has anybody found a good replacement/ source of the mighty MV13yh bias diode, found in lots of popular ssb rigs, one would think they should be...
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    DX959 - Unknown/understood mod

    Yup, Thanks Robb.....gave the whole radio a good once over, found a few traces where it looks like parts have been replaced, all the components are what they should be but the trace is pulled up where the part lead is through the board. Fixed all of those as best I could, and did change Q54 out...
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    DX959 - Unknown/understood mod

    Got it Robb, no problem there, part of the problem was VR12. change that out adjustments went well, all is good. Getting about 26 or so SSB and about 12 on the AM swing 5 watt DK. Now to get mine sounding better , got it used from a truck driver at work, said he didn't like it, AM sounds fine...
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    DX959 - Unknown/understood mod

    Well, it's still alive but I don't think it would have lasted long either, thus my question. Yup single Mosfet radio, seem to run and sound good NEW problem, been trying to reset the biases and the Service manual is for Bipolar outputs, says 50mA and 100mA resptivly, driver and final, well...
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    help with galaxy 959

    I just worked on a 959 with the exact same symptoms, in this one the test point were not contacting the foil board, failing to get voltage to the driver and final stages..... wouldn't be a bad thing to check either.....
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    DX959 - Unknown/understood mod

    Sorry to leave any everyone hanging, the surface mount components at D16 & 17 are factory, they can't keep stock of the typical 1ss53 so they grind the traces and used SM parts. All the twisted 4148's are also factory same concept, can't keep stock of the original parts. No wires from the test...
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    DX959 - Unknown/understood mod

    Well the trans mod is some sort of swing mod, definitely helped AM swing. Radio wasn't originally running, but who ever was in it last bent the brackets for the shorting bar feeding the output stage, no contact no power. Radio seems like it runs pretty good , needs an alignment , but otherwise...
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    DX959 - Unknown/understood mod

    my apologies, I said they were paralleled and the are not, the originals are gone, just can't under stand why they wouldn't put whatever the parts on the solder side are back on the top, less they don't want anyone knowing what they put in? or can't get it except as a surface mount?
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    DX 959 UNKNOWN mods

    Well, long story short for now, Been asked to do some work on a friends DX959, mods are simple enough, but I always inspect, run, and document everything I find before I actually do any work. I believe this is a newer MOSFET model, and most of the mods/repairs I'm finding make sense. there are 2...
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    DX959 - Unknown/understood mod

    Just a bump, really can't make sense of the diodes D16 and D17 being paralleled , or the extra 2sc945 on Q55 in the AF power circuit:cursing:. Probably going to pull them out and try to fix the traces they cut to isolate the ground trace they couldn't solder around, unless someone has a clue to...
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    DX959 - Unknown/understood mod

    Well, long story short for now, Been asked to do some work on a friends DX959, mods are simple enough, but I always inspect, run, and document everything I find before I actually do any work. I believe this is a newer MOSFET model, and most of the mods/repairs I'm finding make sense. there are...
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    8719 Washington

    I do have 13+ volts in rx, during tx it drops to 2.5-2.6 volts. I'll check through some of the caps in the area, especially the ones going to ground. If it means anything, I can adjust the bias trimmers with almost no change in the output, it seemed a little odd , but not knowing why my new...
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    8719 Washington

    another 8719 washington Been stumped by this thing for days, bought used non-working, needed quite a few parts including AM reg, predriver, driver, final, thermal diode on both final and driver(not new salvaged from 148), and a couple solder joints that weren't suppose to be. Replaced parts...
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    Cobra/Dynascan 148GTL Parts

    BUMP Same coils as Uniden washington L33 & 35 I'm working over the driver and final section of a 8719 Washington, and L35 is burnt through the plastic shrink tubing. Did anyone find out the value of these choke coils, Service manual for the newer 148's says Kel-149LH-3 for the part # and the...