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Alinco DM-340MW Power supply

Discussion in 'Radio Circuits, Repair & Performance' started by VK4GAP, Sep 21, 2020.

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  1. VK4GAP

    VK4GAP Ham Member QRZ Page

    Used the 1997 1st version schematics of the DM-340MVT (off the Alinco site) to update it to the latest version MW for posterity's sake , they have been upgraded a little from the old .

    On a side-note and general interest , i did some digging in the web and the 1997 version seems to be the 1st one around of that style , later came the Yaesu and A Manson? and some other i think , what happened with the yaesu fp-1030 is they swapped sides where the transformer sits , uploaded is the schematic of that also , you'll notice its practically the same , even the numbers but with a added overload led using the unused op-amp in the ic and minus a bridge rectifier .

    So there will be 3 , the original unmodified , the modified , and then the fp1030 .

    Orig-1997.jpg

    Orig-Modded.jpg

    yaesu one.jpg
     
  2. VK4GAP

    VK4GAP Ham Member QRZ Page

    Ooops , the 2SC880 is a PNP and has a incorrect D in it , those 2SC5200's are NPN (not listed as anything in it) , apologies but can't fix that schemmy up in the OP ..
     

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