J jasaab Member Joined 2018 2024-08-28 5:24 am #1 2024-08-28 5:24 am #1 I have a crown IC-150a preamp that the Reed switch is not working. Other than bypassing it and loosing mute function. Any thoughts about replacing it is a 24 v 5k ohm DPST Reed valve. chrisng Member Joined 2015 2024-08-29 4:26 am #2 2024-08-29 4:26 am #2 Can't find replacement part? B basreflex Member Joined 2007 2024-08-29 5:19 am #3 2024-08-29 5:19 am #3 did you try to demagnetize the reedswith, did it get stuck or failed to close? Reactions: Audio>X B basreflex Member Joined 2007 2024-08-29 5:46 am #4 2024-08-29 5:46 am #4 did you check the relay driver transistor ? at startup the transistor gets -28V on its base, slowly destroying the Hfe, or simply destroying it. Reactions: Audio>X J jasaab Member Joined 2018 2024-08-29 2:10 pm #5 2024-08-29 2:10 pm #5 Yes I need replacement part. Will check driver transistor. Best way to demagnitize switch? B basreflex Member Joined 2007 2024-08-29 2:16 pm #6 2024-08-29 2:16 pm #6 old style tape head demagnetizer. radio shack dungeons ? B basreflex Member Joined 2007 2024-08-29 2:22 pm #7 2024-08-29 2:22 pm #7 JWD-171-24 mouser, 2.2kohms but the transistor can handle that You must log in or register to reply here. Share: Facebook X (Twitter) LinkedIn Reddit Pinterest Tumblr WhatsApp Email Link Home Amplifiers Solid State Reed switch replacement for Crown IC-150a
I have a crown IC-150a preamp that the Reed switch is not working. Other than bypassing it and loosing mute function. Any thoughts about replacing it is a 24 v 5k ohm DPST Reed valve.
chrisng Member Joined 2015 2024-08-29 4:26 am #2 2024-08-29 4:26 am #2 Can't find replacement part? B basreflex Member Joined 2007 2024-08-29 5:19 am #3 2024-08-29 5:19 am #3 did you try to demagnetize the reedswith, did it get stuck or failed to close? Reactions: Audio>X B basreflex Member Joined 2007 2024-08-29 5:46 am #4 2024-08-29 5:46 am #4 did you check the relay driver transistor ? at startup the transistor gets -28V on its base, slowly destroying the Hfe, or simply destroying it. Reactions: Audio>X J jasaab Member Joined 2018 2024-08-29 2:10 pm #5 2024-08-29 2:10 pm #5 Yes I need replacement part. Will check driver transistor. Best way to demagnitize switch? B basreflex Member Joined 2007 2024-08-29 2:16 pm #6 2024-08-29 2:16 pm #6 old style tape head demagnetizer. radio shack dungeons ? B basreflex Member Joined 2007 2024-08-29 2:22 pm #7 2024-08-29 2:22 pm #7 JWD-171-24 mouser, 2.2kohms but the transistor can handle that You must log in or register to reply here. Share: Facebook X (Twitter) LinkedIn Reddit Pinterest Tumblr WhatsApp Email Link
B basreflex Member Joined 2007 2024-08-29 5:19 am #3 2024-08-29 5:19 am #3 did you try to demagnetize the reedswith, did it get stuck or failed to close? Reactions: Audio>X B basreflex Member Joined 2007 2024-08-29 5:46 am #4 2024-08-29 5:46 am #4 did you check the relay driver transistor ? at startup the transistor gets -28V on its base, slowly destroying the Hfe, or simply destroying it. Reactions: Audio>X J jasaab Member Joined 2018 2024-08-29 2:10 pm #5 2024-08-29 2:10 pm #5 Yes I need replacement part. Will check driver transistor. Best way to demagnitize switch? B basreflex Member Joined 2007 2024-08-29 2:16 pm #6 2024-08-29 2:16 pm #6 old style tape head demagnetizer. radio shack dungeons ? B basreflex Member Joined 2007 2024-08-29 2:22 pm #7 2024-08-29 2:22 pm #7 JWD-171-24 mouser, 2.2kohms but the transistor can handle that You must log in or register to reply here. Share: Facebook X (Twitter) LinkedIn Reddit Pinterest Tumblr WhatsApp Email Link
B basreflex Member Joined 2007 2024-08-29 5:46 am #4 2024-08-29 5:46 am #4 did you check the relay driver transistor ? at startup the transistor gets -28V on its base, slowly destroying the Hfe, or simply destroying it. Reactions: Audio>X J jasaab Member Joined 2018 2024-08-29 2:10 pm #5 2024-08-29 2:10 pm #5 Yes I need replacement part. Will check driver transistor. Best way to demagnitize switch? B basreflex Member Joined 2007 2024-08-29 2:16 pm #6 2024-08-29 2:16 pm #6 old style tape head demagnetizer. radio shack dungeons ? B basreflex Member Joined 2007 2024-08-29 2:22 pm #7 2024-08-29 2:22 pm #7 JWD-171-24 mouser, 2.2kohms but the transistor can handle that You must log in or register to reply here. Share: Facebook X (Twitter) LinkedIn Reddit Pinterest Tumblr WhatsApp Email Link
did you check the relay driver transistor ? at startup the transistor gets -28V on its base, slowly destroying the Hfe, or simply destroying it.
J jasaab Member Joined 2018 2024-08-29 2:10 pm #5 2024-08-29 2:10 pm #5 Yes I need replacement part. Will check driver transistor. Best way to demagnitize switch? B basreflex Member Joined 2007 2024-08-29 2:16 pm #6 2024-08-29 2:16 pm #6 old style tape head demagnetizer. radio shack dungeons ? B basreflex Member Joined 2007 2024-08-29 2:22 pm #7 2024-08-29 2:22 pm #7 JWD-171-24 mouser, 2.2kohms but the transistor can handle that You must log in or register to reply here. Share: Facebook X (Twitter) LinkedIn Reddit Pinterest Tumblr WhatsApp Email Link
B basreflex Member Joined 2007 2024-08-29 2:16 pm #6 2024-08-29 2:16 pm #6 old style tape head demagnetizer. radio shack dungeons ? B basreflex Member Joined 2007 2024-08-29 2:22 pm #7 2024-08-29 2:22 pm #7 JWD-171-24 mouser, 2.2kohms but the transistor can handle that You must log in or register to reply here.
B basreflex Member Joined 2007 2024-08-29 2:22 pm #7 2024-08-29 2:22 pm #7 JWD-171-24 mouser, 2.2kohms but the transistor can handle that
