Uncle Paul
07-03-2007, 07:36 PM
I took the Biamp section of the 3145 Biased network that Giskard graciously created and split it into three sections and modified by adding some protection caps for the compression driver.
For use as a Biamp network BIAMP OUT connects to BIAMP IN and s1 is set to bypass the 47 uF caps. UHF IN is connected to MF IN.
For use as a Triamp network TRIAMP IN and UHF IN are connected and s1 is set to place the 47 uF caps in the signal path. The purpose of these caps is to protect the compression driver. Fc is low enough (< 600 Hz) that it should not be audible, but I can always bypass them with s1 if desired.
I'm considering copper foil inductors, but the closest I can get to exact values for the 0.10 mH and 0.6 mH are 0.11 mH and 0.62 mH respectively.
My question here is if the copper foils are worth the extra expense?
Is it worth the effort to unwind and re heat shrink copper foils to get exact values or are the stock values close enough?
For use as a Biamp network BIAMP OUT connects to BIAMP IN and s1 is set to bypass the 47 uF caps. UHF IN is connected to MF IN.
For use as a Triamp network TRIAMP IN and UHF IN are connected and s1 is set to place the 47 uF caps in the signal path. The purpose of these caps is to protect the compression driver. Fc is low enough (< 600 Hz) that it should not be audible, but I can always bypass them with s1 if desired.
I'm considering copper foil inductors, but the closest I can get to exact values for the 0.10 mH and 0.6 mH are 0.11 mH and 0.62 mH respectively.
My question here is if the copper foils are worth the extra expense?
Is it worth the effort to unwind and re heat shrink copper foils to get exact values or are the stock values close enough?