> I am thinking that 500-600 ohm resistors with a 4.8v battery pack
> would supply the voltage and current the capsule needs, and only a
> 1.8 dB drop in voltage when it meets the LS-11, compared to the 9 dB
> drop it is probably getting now.
Hi John,
I agree that reducing the resistors to 500 ohm would indeed lower the outpu=
t impedance of the circuit. But I'm afraid that the (AC) output signal volt=
age would then be reduced too, which would mean that the signal level at th=
e preamp input of the recorder is finally not being improved...
> The battery box as
> currently configured is using a load resistor nearly equal to the
> impedance of the capsule, thus dividing the battery voltage in half
> and presenting about 4.5 volts to the capsules.
Yes, this is obviously the configuration that provides the best possible pe=
rformance because the output signal level reaches it's maximum under these =
conditions.
Bye the way, there is another Yahoo group that is dedicated to building mic=
rophones (http://tech.dir.groups.yahoo.com/group/micbuilders). Those guys m=
ight be able to provide more detailed hints.
Regards,
Raimund
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