Ok, I've found a schematic for a phono preamp, I understand the schematic EXCEPT the power supply. I don't understand the significance of the 9 and 4,5 nor do I understand what "SR" means next to the arrow. Is there two transformers? I've never worked with power supplies before. Can someone help me out?
Here is the schematic:
http://www.shure.com/stellent/groups/public/@gms_gmi_web_ug/documents/web_resource/us_pro_m65_ug.pdf
Here is the schematic:
http://www.shure.com/stellent/groups/public/@gms_gmi_web_ug/documents/web_resource/us_pro_m65_ug.pdf