any point in trying, or waste of time ?
T tinitus Ex-Moderator R.I.P. Joined 2005 2013-03-02 8:46 am #1 2013-03-02 8:46 am #1 any point in trying, or waste of time ? Attachments IMG_8565.JPG 165.9 KB · Views: 200 ••• More options Share lineup Member Joined 2005 2013-03-02 8:53 am #2 2013-03-02 8:53 am #2 They are high gain darlington, typical hFE is 2500 ... The maximum VCE is only 60 Volt so you should use no more than 2x25 VDC or 2x30 VDC. This means max 2x20 VAC transformer. Preferably 2x18 transformer. Into 8 Ohm you can count on max something like 30 Watt. ••• More options Share W wahab Member Joined 2009 2013-03-02 9:05 am #3 2013-03-02 9:05 am #3 Good to be driven by a NE5532 for about 10-12W/8R if you have any use for a low power amp , let say as PC amp. Anything more complexe would be wasted by thoses devices , i guess that even a 5532 would be more happy with Sankens darlingtons instead. ••• More options Share T tinitus Ex-Moderator R.I.P. Joined 2005 2013-03-02 9:19 am #4 2013-03-02 9:19 am #4 I would consider it only as a tweeter amp for active bass guitar speaker sounds like it would be ok to just take the heatsink and build a chip amp instead ••• More options Share F Fusion916 Member Joined 2012 2013-03-02 7:50 pm #5 2013-03-02 7:50 pm #5 junk the transistors, save the heatsink for something else. ••• More options Share W wg_ski Member Joined 2007 2013-03-02 8:11 pm #6 2013-03-02 8:11 pm #6 Don't junk them. You never know when you'll need a relay driver or something. ••• More options Share Show hidden low quality content Status This old topic is closed. If you want to reopen this topic, contact a moderator using the "Report Post" button. Share: Facebook Twitter Reddit Pinterest Tumblr WhatsApp Email Share Link
lineup Member Joined 2005 2013-03-02 8:53 am #2 2013-03-02 8:53 am #2 They are high gain darlington, typical hFE is 2500 ... The maximum VCE is only 60 Volt so you should use no more than 2x25 VDC or 2x30 VDC. This means max 2x20 VAC transformer. Preferably 2x18 transformer. Into 8 Ohm you can count on max something like 30 Watt. ••• More options Share W wahab Member Joined 2009 2013-03-02 9:05 am #3 2013-03-02 9:05 am #3 Good to be driven by a NE5532 for about 10-12W/8R if you have any use for a low power amp , let say as PC amp. Anything more complexe would be wasted by thoses devices , i guess that even a 5532 would be more happy with Sankens darlingtons instead. ••• More options Share T tinitus Ex-Moderator R.I.P. Joined 2005 2013-03-02 9:19 am #4 2013-03-02 9:19 am #4 I would consider it only as a tweeter amp for active bass guitar speaker sounds like it would be ok to just take the heatsink and build a chip amp instead ••• More options Share F Fusion916 Member Joined 2012 2013-03-02 7:50 pm #5 2013-03-02 7:50 pm #5 junk the transistors, save the heatsink for something else. ••• More options Share W wg_ski Member Joined 2007 2013-03-02 8:11 pm #6 2013-03-02 8:11 pm #6 Don't junk them. You never know when you'll need a relay driver or something. ••• More options Share Show hidden low quality content Status This old topic is closed. If you want to reopen this topic, contact a moderator using the "Report Post" button. Share: Facebook Twitter Reddit Pinterest Tumblr WhatsApp Email Share Link
They are high gain darlington, typical hFE is 2500 ... The maximum VCE is only 60 Volt so you should use no more than 2x25 VDC or 2x30 VDC. This means max 2x20 VAC transformer. Preferably 2x18 transformer. Into 8 Ohm you can count on max something like 30 Watt.
W wahab Member Joined 2009 2013-03-02 9:05 am #3 2013-03-02 9:05 am #3 Good to be driven by a NE5532 for about 10-12W/8R if you have any use for a low power amp , let say as PC amp. Anything more complexe would be wasted by thoses devices , i guess that even a 5532 would be more happy with Sankens darlingtons instead. ••• More options Share T tinitus Ex-Moderator R.I.P. Joined 2005 2013-03-02 9:19 am #4 2013-03-02 9:19 am #4 I would consider it only as a tweeter amp for active bass guitar speaker sounds like it would be ok to just take the heatsink and build a chip amp instead ••• More options Share F Fusion916 Member Joined 2012 2013-03-02 7:50 pm #5 2013-03-02 7:50 pm #5 junk the transistors, save the heatsink for something else. ••• More options Share W wg_ski Member Joined 2007 2013-03-02 8:11 pm #6 2013-03-02 8:11 pm #6 Don't junk them. You never know when you'll need a relay driver or something. ••• More options Share Show hidden low quality content Status This old topic is closed. If you want to reopen this topic, contact a moderator using the "Report Post" button. Share: Facebook Twitter Reddit Pinterest Tumblr WhatsApp Email Share Link
Good to be driven by a NE5532 for about 10-12W/8R if you have any use for a low power amp , let say as PC amp. Anything more complexe would be wasted by thoses devices , i guess that even a 5532 would be more happy with Sankens darlingtons instead.
T tinitus Ex-Moderator R.I.P. Joined 2005 2013-03-02 9:19 am #4 2013-03-02 9:19 am #4 I would consider it only as a tweeter amp for active bass guitar speaker sounds like it would be ok to just take the heatsink and build a chip amp instead ••• More options Share F Fusion916 Member Joined 2012 2013-03-02 7:50 pm #5 2013-03-02 7:50 pm #5 junk the transistors, save the heatsink for something else. ••• More options Share W wg_ski Member Joined 2007 2013-03-02 8:11 pm #6 2013-03-02 8:11 pm #6 Don't junk them. You never know when you'll need a relay driver or something. ••• More options Share Show hidden low quality content Status This old topic is closed. If you want to reopen this topic, contact a moderator using the "Report Post" button. Share: Facebook Twitter Reddit Pinterest Tumblr WhatsApp Email Share Link
I would consider it only as a tweeter amp for active bass guitar speaker sounds like it would be ok to just take the heatsink and build a chip amp instead
F Fusion916 Member Joined 2012 2013-03-02 7:50 pm #5 2013-03-02 7:50 pm #5 junk the transistors, save the heatsink for something else. ••• More options Share W wg_ski Member Joined 2007 2013-03-02 8:11 pm #6 2013-03-02 8:11 pm #6 Don't junk them. You never know when you'll need a relay driver or something. ••• More options Share Show hidden low quality content Status This old topic is closed. If you want to reopen this topic, contact a moderator using the "Report Post" button.
W wg_ski Member Joined 2007 2013-03-02 8:11 pm #6 2013-03-02 8:11 pm #6 Don't junk them. You never know when you'll need a relay driver or something. ••• More options Share
