Hi, I'm looking for replacements for some 40+ year old zener diodes and rectifier diodes for a marantz model 16 amplifier. Part numbers are sr154, sr154r (rectifiers) and sz51064k (zener diode). Is there a modern replacement for these? the rectifiers are listed as cr6,7,8,9 on the parts list and schematic. the service manual can be downloaded for free at faultlineaudio.squarespace.com.
Hi and welcome,Thank you for the question and your patience. Should you still need assistance for information purposes only... Initially, diodes CR6~9 are metal cased versions. Unfortunately, no readily available direct replacements. However with observance of anode/cathode orientation, there are substitutes / equivalents :
Hopefully, the above information may serve your purpose and would appreciate a rating if so warranted. Otherwise, please post back should further assistance be needed or a new question for your other concerns.Good luck and thank you for the opportunity to be able to share the information.