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{
    "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/HT5LVJLQIFES7IFWAYAH5DRPAJXM6XSO/",
    "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/",
    "message_id": "[email protected]",
    "message_id_hash": "HT5LVJLQIFES7IFWAYAH5DRPAJXM6XSO",
    "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/HT5LVJLQIFES7IFWAYAH5DRPAJXM6XSO/",
    "sender": {
        "address": "w9gb (a) icloud.com",
        "mailman_id": "b156075684ac4750b888b2dd14137a40",
        "emails": "https://mailman.amsat.org/hyperkitty/api/sender/b156075684ac4750b888b2dd14137a40/emails/"
    },
    "sender_name": "Gregory Beat",
    "subject": "Re: [amsat-bb] FT-736 power supply part",
    "date": "2020-08-07T23:06:41Z",
    "parent": null,
    "children": [],
    "votes": {
        "likes": 0,
        "dislikes": 0,
        "status": "neutral"
    },
    "content": "DL7VHF placed the FT-736R SMPS schematic diagram on Last Pages\nhttp://www.catlog.net/_Descarregas/Manuals/03-Yaesu/Yaesu%20FT-736R-PS-Repair.pdf\n\nSCR21 : marked: TH21 5P4M\nNEC 5P4M, 5A, 400V Thyristor in a TO-220 case, \n==\nPossible substitutes: Phillips BT258-500R , STMicroelectronics TYN608\nhttps://www.digikey.com/products/en/discrete-semiconductor-products/thyristors-scrs/281\n\nNTE 5424 appears to be suitable substitute.\nhttps://www.nteinc.com/specs/5400to5499/pdf/nte5424.pdf\n\nDigi-Key F7250-ND (Littlefuse S4008LTP)\nSCR 400V, 8A Standard Recovery, TO-220AB-L, Isolated Tab\nhttps://www.digikey.com/product-detail/en/littelfuse-inc/S4008LTP/F7250-ND/5819416\nLittlefuse Data Sheet\nhttps://www.littelfuse.com/~/media/electronics/datasheets/switching_thyristors/littelfuse_thyristor_sxx08xsx_sxx08x_datasheet.pdf.pdf\n\ngreg\nw9gb\n===\nDate: Fri, 07 Aug 2020 16:04:16 -0600\nFrom: \"Vince Fiscus, KB7ADL\" <[email protected]>\nTo: AMSAT-BB\nSubject: [amsat-bb] FT-736 power supply part\n\nHi All,\n\nI walked into the shack about a month ago and smelled something\nreally hot like the smell from a hot resistor.  Turned off all\nthe equipment waited a while then turned everything back on.\n\nThe FT-736 didn't come back on, so I assumed the power supply,\nas this is a common problem with the rigs as they get older.\n\nBought a repair replacement kit for the electrolytic caps\nin the power supply, which is normally the problem. They get\nbaked and fail.\n\nGot the power supply out last night to do the repairs and\nI discovered it was the SCR in the power supply that had\ntotally burned up. Weird.\n\nDoes anyone here have or know a Digi-key or Mouser part\nnumber for the SCR or an equivalent compatible part?\nIt labeled SCR21 on P.C. board.\n\nThanks\nVince ",
    "attachments": []
}