PDA

View Full Version : L300 charge coupled crossover questions



Bama5000lps
09-17-2008, 08:12 AM
Thanks to member 4313b for posting the L300 schematics in the 4333/S300/L300 equivalent bandbass circuit thread:applaud:. I have built the passive L300 crossover from the schematic that he posted. The passive crossover works so well that I am now ready to move to the charge-coupled crossover that he posted.

I have two questions about the charged coupled L300 schematic. (I do not have a background in electronics so I am sorry if the questions are simple minded.)

1) Does each charged pair of capacitors require a separate 9V battery?
2) In the midrange portion of the schematic a pair of charged capacitors are 33uF and 39uF. Is there a reason that two 36uF capacitors were not recommended? On every charge coupled schematic I have found the charged capacitors are always in matched pairs.

Thank in advance for any help that you can provide.:)

http://audioheritage.org/vbulletin/attachment.php?attachmentid=76&stc=1&d=1052965033

grumpy
09-17-2008, 08:30 AM
1) no (wire the end of the 3meg resistors in the schematic marked +9v together)
2) 33 and 39 uF are standard values (readily available)

Bama5000lps
09-19-2008, 03:30 PM
Thanks grumpy.