S Snowman1 Member Joined 2020 2023-07-31 2:31 pm #1 2023-07-31 2:31 pm #1 Hi guys! Please help me identify these diodes in the power supply of an RCF TT 08-A amplifier module. These diodes are part of the gate drive circuit of the power supply mosfets. Thanks in advance! Attachments 20230731_161044.jpg 415.8 KB · Views: 114 20230731_160644.jpg 486.2 KB · Views: 107 Netlist Moderator Joined 2003 Paid Member 2023-07-31 4:10 pm #2 2023-07-31 4:10 pm #2 It looks very much like a 1N4148 but without schematic it's impossible to tell. Hugo R RJM1 Member Joined 2010 2023-07-31 4:58 pm #3 2023-07-31 4:58 pm #3 gate drive circuit? could be 15V or 18V zener diodes from gate to source to protect the gate from over voltage. Reactions: Netlist S Snowman1 Member Joined 2020 2023-07-31 5:49 pm #4 2023-07-31 5:49 pm #4 I drew the affected part. I think the role of the diode is to drain the gate faster on a path with a lower impedance. Attachments 20230731_194409.jpg 327.4 KB · Views: 71 R RJM1 Member Joined 2010 2023-07-31 5:54 pm #5 2023-07-31 5:54 pm #5 !n4148 to decrease turnoff time. rayma Moderator Joined 2011 2023-07-31 6:04 pm #6 2023-07-31 6:04 pm #6 Yes, then it's a diode similar to the 1N4148 Low voltage, fast switching. S Snowman1 Member Joined 2020 2023-08-01 9:52 am #7 2023-08-01 9:52 am #7 Thank you very much everyone for your help! Kay Pirinha Member Joined 2011 2023-08-01 10:03 am #8 2023-08-01 10:03 am #8 ...but appears to be the MELF version... Best regards! You must log in or register to reply here. Share: Facebook X (Twitter) LinkedIn Reddit Pinterest Tumblr WhatsApp Email Link Home Amplifiers Power Supplies Help Identifying diodes
Hi guys! Please help me identify these diodes in the power supply of an RCF TT 08-A amplifier module. These diodes are part of the gate drive circuit of the power supply mosfets. Thanks in advance!
Netlist Moderator Joined 2003 Paid Member 2023-07-31 4:10 pm #2 2023-07-31 4:10 pm #2 It looks very much like a 1N4148 but without schematic it's impossible to tell. Hugo R RJM1 Member Joined 2010 2023-07-31 4:58 pm #3 2023-07-31 4:58 pm #3 gate drive circuit? could be 15V or 18V zener diodes from gate to source to protect the gate from over voltage. Reactions: Netlist S Snowman1 Member Joined 2020 2023-07-31 5:49 pm #4 2023-07-31 5:49 pm #4 I drew the affected part. I think the role of the diode is to drain the gate faster on a path with a lower impedance. Attachments 20230731_194409.jpg 327.4 KB · Views: 71 R RJM1 Member Joined 2010 2023-07-31 5:54 pm #5 2023-07-31 5:54 pm #5 !n4148 to decrease turnoff time. rayma Moderator Joined 2011 2023-07-31 6:04 pm #6 2023-07-31 6:04 pm #6 Yes, then it's a diode similar to the 1N4148 Low voltage, fast switching. S Snowman1 Member Joined 2020 2023-08-01 9:52 am #7 2023-08-01 9:52 am #7 Thank you very much everyone for your help! Kay Pirinha Member Joined 2011 2023-08-01 10:03 am #8 2023-08-01 10:03 am #8 ...but appears to be the MELF version... Best regards! You must log in or register to reply here. Share: Facebook X (Twitter) LinkedIn Reddit Pinterest Tumblr WhatsApp Email Link Home Amplifiers Power Supplies Help Identifying diodes
R RJM1 Member Joined 2010 2023-07-31 4:58 pm #3 2023-07-31 4:58 pm #3 gate drive circuit? could be 15V or 18V zener diodes from gate to source to protect the gate from over voltage. Reactions: Netlist S Snowman1 Member Joined 2020 2023-07-31 5:49 pm #4 2023-07-31 5:49 pm #4 I drew the affected part. I think the role of the diode is to drain the gate faster on a path with a lower impedance. Attachments 20230731_194409.jpg 327.4 KB · Views: 71 R RJM1 Member Joined 2010 2023-07-31 5:54 pm #5 2023-07-31 5:54 pm #5 !n4148 to decrease turnoff time. rayma Moderator Joined 2011 2023-07-31 6:04 pm #6 2023-07-31 6:04 pm #6 Yes, then it's a diode similar to the 1N4148 Low voltage, fast switching. S Snowman1 Member Joined 2020 2023-08-01 9:52 am #7 2023-08-01 9:52 am #7 Thank you very much everyone for your help! Kay Pirinha Member Joined 2011 2023-08-01 10:03 am #8 2023-08-01 10:03 am #8 ...but appears to be the MELF version... Best regards! You must log in or register to reply here. Share: Facebook X (Twitter) LinkedIn Reddit Pinterest Tumblr WhatsApp Email Link
gate drive circuit? could be 15V or 18V zener diodes from gate to source to protect the gate from over voltage.
S Snowman1 Member Joined 2020 2023-07-31 5:49 pm #4 2023-07-31 5:49 pm #4 I drew the affected part. I think the role of the diode is to drain the gate faster on a path with a lower impedance. Attachments 20230731_194409.jpg 327.4 KB · Views: 71 R RJM1 Member Joined 2010 2023-07-31 5:54 pm #5 2023-07-31 5:54 pm #5 !n4148 to decrease turnoff time. rayma Moderator Joined 2011 2023-07-31 6:04 pm #6 2023-07-31 6:04 pm #6 Yes, then it's a diode similar to the 1N4148 Low voltage, fast switching. S Snowman1 Member Joined 2020 2023-08-01 9:52 am #7 2023-08-01 9:52 am #7 Thank you very much everyone for your help! Kay Pirinha Member Joined 2011 2023-08-01 10:03 am #8 2023-08-01 10:03 am #8 ...but appears to be the MELF version... Best regards! You must log in or register to reply here. Share: Facebook X (Twitter) LinkedIn Reddit Pinterest Tumblr WhatsApp Email Link
I drew the affected part. I think the role of the diode is to drain the gate faster on a path with a lower impedance.
R RJM1 Member Joined 2010 2023-07-31 5:54 pm #5 2023-07-31 5:54 pm #5 !n4148 to decrease turnoff time. rayma Moderator Joined 2011 2023-07-31 6:04 pm #6 2023-07-31 6:04 pm #6 Yes, then it's a diode similar to the 1N4148 Low voltage, fast switching. S Snowman1 Member Joined 2020 2023-08-01 9:52 am #7 2023-08-01 9:52 am #7 Thank you very much everyone for your help! Kay Pirinha Member Joined 2011 2023-08-01 10:03 am #8 2023-08-01 10:03 am #8 ...but appears to be the MELF version... Best regards! You must log in or register to reply here. Share: Facebook X (Twitter) LinkedIn Reddit Pinterest Tumblr WhatsApp Email Link
rayma Moderator Joined 2011 2023-07-31 6:04 pm #6 2023-07-31 6:04 pm #6 Yes, then it's a diode similar to the 1N4148 Low voltage, fast switching. S Snowman1 Member Joined 2020 2023-08-01 9:52 am #7 2023-08-01 9:52 am #7 Thank you very much everyone for your help! Kay Pirinha Member Joined 2011 2023-08-01 10:03 am #8 2023-08-01 10:03 am #8 ...but appears to be the MELF version... Best regards! You must log in or register to reply here. Share: Facebook X (Twitter) LinkedIn Reddit Pinterest Tumblr WhatsApp Email Link
S Snowman1 Member Joined 2020 2023-08-01 9:52 am #7 2023-08-01 9:52 am #7 Thank you very much everyone for your help! Kay Pirinha Member Joined 2011 2023-08-01 10:03 am #8 2023-08-01 10:03 am #8 ...but appears to be the MELF version... Best regards! You must log in or register to reply here.
Kay Pirinha Member Joined 2011 2023-08-01 10:03 am #8 2023-08-01 10:03 am #8 ...but appears to be the MELF version... Best regards!
