JohnRoberts said:looks like gain would be 1+2200/390 while cap coupled 1800 is in parallel with 390 increasing gain to roughly 7.8X
I am unclear what "T" connects to because termination there could affect gain.
JR
removing attenuation is always preferable to adding gainsimonsez said:which better way to get more gain?
wiring the input transformer as 1:1,
A variable R from T to V would increase gain, that is probably what T is there for...or connect T to V in series with resistor to increase gain.
simonsez said:which better way to get more gain? wiring the input transformer as 1:1, or connect T to V in series with resistor to increase gain.
There is a document on the Internet called "Neve-1073-fullpak.pdf" that contains exactly the information you seek. Specifically there is a table that lists the gain associated with various bypass resistor values on point T. For example, it claims that you can achive as much as 48dB with a resistor of 8.2R (I have verified this with an LTSpice simulation which shows simulated gain of 48.1dB but I have never measured actual gain or stability of this particular configuration). You must also specify a feedback resistor on point S although the value is largely not influential so you should probably just use something like what is used in known circuits like 15K or 18K. In the typical 1073 circuit, first stage gain is defined by 15K FB and 91R bypass which yields gain of 30dB.simonsez said:any info how much gain of single stage Neve BA284 card?
squarewave said:There is a document on the Internet called "Neve-1073-fullpak.pdf" that contains exactly the information you seek. Specifically there is a table that lists the gain associated with various bypass resistor values on point T. For example, it claims that you can achive as much as 48dB with a resistor of 8.2R (I have verified this with an LTSpice simulation which shows simulated gain of 48.1dB but I have never measured actual gain or stability of this particular configuration). You must also specify a feedback resistor on point S although the value is largely not influential so you should probably just use something like what is used in known circuits like 15K or 18K. In the typical 1073 circuit, first stage gain is defined by 15K FB and 91R bypass which yields gain of 30dB.
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