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  • Stern Cairo sworsdman mosfet replacement...

    From Schus@21:1/5 to All on Wed Dec 8 06:52:49 2021
    I have the infamous Stern Indy Cairo Swordsman issue pop up recently. I saw a tech post by someone which said to replace the P/N BSS123 Mosfet chip with transistor type MMST3904 for Q1. I'm just seeing this type:MMST3904-7 Transistor Bipolar NPN 40V 0.2A
    SC70-3 listed. Would this be a suitable replacement?

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  • From John Robertson@21:1/5 to Schus on Wed Dec 8 08:49:45 2021
    On 2021/12/08 6:52 a.m., Schus wrote:
    I have the infamous Stern Indy Cairo Swordsman issue pop up recently. I saw a tech post by someone which said to replace the P/N BSS123 Mosfet chip with transistor type MMST3904 for Q1. I'm just seeing this type:MMST3904-7 Transistor Bipolar NPN 40V 0.
    2A SC70-3 listed. Would this be a suitable replacement?

    Compare the specs. Although they look cross compatible, I'm not sure why
    the designation "-7" was added. The original part number appears to be
    obsolete so perhaps there is a minor change.

    Digi-key.com has spec sheets on both.

    John :-#)#

    --
    (Please post followups or tech inquiries to the USENET newsgroup)
    John's Jukes Ltd.
    MOVED to #7 - 3979 Marine Way, Burnaby, BC, Canada V5J 5E3
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    "Old pinballers never die, they just flip out."

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  • From Schus@21:1/5 to John Robertson on Wed Dec 8 10:51:13 2021
    On Wednesday, December 8, 2021 at 10:50:01 AM UTC-6, John Robertson wrote:
    On 2021/12/08 6:52 a.m., Schus wrote:
    I have the infamous Stern Indy Cairo Swordsman issue pop up recently. I saw a tech post by someone which said to replace the P/N BSS123 Mosfet chip with transistor type MMST3904 for Q1. I'm just seeing this type:MMST3904-7 Transistor Bipolar NPN 40V
    0.2A SC70-3 listed. Would this be a suitable replacement?

    Compare the specs. Although they look cross compatible, I'm not sure why
    the designation "-7" was added. The original part number appears to be obsolete so perhaps there is a minor change.

    Digi-key.com has spec sheets on both.

    John :-#)#

    --
    (Please post followups or tech inquiries to the USENET newsgroup)
    John's Jukes Ltd.
    MOVED to #7 - 3979 Marine Way, Burnaby, BC, Canada V5J 5E3
    (604)872-5757 (Pinballs, Jukes, Video Games)
    www.flippers.com
    "Old pinballers never die, they just flip out."

    Thanks John... wasn't clear on the -7 either

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