|
Audio Asylum Thread Printer Get a view of an entire thread on one page |
For Sale Ads |
174.31.250.157
In Reply to: RE: Any inexpensive stage for playing 78's? posted by dcharvonia on January 30, 2015 at 07:51:36
nt
Follow Ups:
Sure - on the schematic there is a 47K resistor from the phono input to ground. Just replace it with a 100K resistor to compensate for the cartridge modification (assuming you are going to wire the coils in series as suggested.)
Is it due to the change in series resistance from parallel? I don't have enough electrical background to fully understand. Thanks.
You're doubling the output impedance of the cartridge by connecting the 2 coils in series, so you double the impedance of the load by adding another 47K resistor in series (thus 100K more or less). Just like matching the impedance of your speaker to the output transformer (only in reverse!) I think that is the correct explanation - someone please correct me if I'm mistaken.
nt
Post a Followup:
FAQ |
Post a Message! |
Forgot Password? |
|
||||||||||||||
|
This post is made possible by the generous support of people like you and our sponsors: