C citationfan Member Joined 2013 2024-10-10 3:52 pm #1 2024-10-10 3:52 pm #1 Hi there, Iam a proud owner of a secondhand Pearl one. When looking through the schematics of it there is an option to install a 9V battery between PAD 4 and 5, paralell to the diode 1N4739. What is the backround? Attachments Pearl Phono.pdf Pearl Phono.pdf 755.9 KB · Views: 49 JonSnell Electronic Member Joined 2012 jonsnell.co.uk 2024-10-10 6:59 pm #2 2024-10-10 6:59 pm #2 All that will do is put a 9volt source across the zener diode, (it already has one through R5). Nothing else. 6L6 Moderator Joined 2010 Paid Member 2024-10-10 7:06 pm #3 2024-10-10 7:06 pm #3 It was intended to be used as a voltage reference in lieu of the zener. C citationfan Member Joined 2013 2024-10-12 8:55 pm #4 2024-10-12 8:55 pm #4 Thank you very much guys for your answers! Now my Pearl dead shot 2SK389(Q6) on each channel... You must log in or register to reply here. Share: Facebook X (Twitter) LinkedIn Reddit Pinterest Tumblr WhatsApp Email Link
Hi there, Iam a proud owner of a secondhand Pearl one. When looking through the schematics of it there is an option to install a 9V battery between PAD 4 and 5, paralell to the diode 1N4739. What is the backround?
JonSnell Electronic Member Joined 2012 jonsnell.co.uk 2024-10-10 6:59 pm #2 2024-10-10 6:59 pm #2 All that will do is put a 9volt source across the zener diode, (it already has one through R5). Nothing else. 6L6 Moderator Joined 2010 Paid Member 2024-10-10 7:06 pm #3 2024-10-10 7:06 pm #3 It was intended to be used as a voltage reference in lieu of the zener. C citationfan Member Joined 2013 2024-10-12 8:55 pm #4 2024-10-12 8:55 pm #4 Thank you very much guys for your answers! Now my Pearl dead shot 2SK389(Q6) on each channel... You must log in or register to reply here. Share: Facebook X (Twitter) LinkedIn Reddit Pinterest Tumblr WhatsApp Email Link
All that will do is put a 9volt source across the zener diode, (it already has one through R5). Nothing else.
6L6 Moderator Joined 2010 Paid Member 2024-10-10 7:06 pm #3 2024-10-10 7:06 pm #3 It was intended to be used as a voltage reference in lieu of the zener. C citationfan Member Joined 2013 2024-10-12 8:55 pm #4 2024-10-12 8:55 pm #4 Thank you very much guys for your answers! Now my Pearl dead shot 2SK389(Q6) on each channel... You must log in or register to reply here.
C citationfan Member Joined 2013 2024-10-12 8:55 pm #4 2024-10-12 8:55 pm #4 Thank you very much guys for your answers! Now my Pearl dead shot 2SK389(Q6) on each channel...