Hi everybody,
I got some LSK389C dual jfets today from Linear Systems because they will ship you samples for free. I wanted to throw them into a SRPP type stage because I think its cool looking.
Attached below is the picture of how I set it up. The resistors I used were 150 ohm. I matched the resistors within +-0.2 ohms on my meter. This gave a voltage at the probe point of 9.7 volts, which it should be ~8.1 volts based off a sim (not real world). So with some better matching resistors or a pot instead of a resistor in one place, it would come closer to the ~8.1 volts. I put in a 6.4mV signal and got a 750mV signal out for a total gain of 117. Not to shabby. From the sim these seem to be pretty linear setups right until they clip.
So what kind of solid state output stage could a guy (or girl I guess) use with this that would possibly, but not necessarily have some resemblance to a tube output stage? I found that this can't be dc coupled to the next stage, it must have a capacitor on the output.
I got some LSK389C dual jfets today from Linear Systems because they will ship you samples for free. I wanted to throw them into a SRPP type stage because I think its cool looking.
Attached below is the picture of how I set it up. The resistors I used were 150 ohm. I matched the resistors within +-0.2 ohms on my meter. This gave a voltage at the probe point of 9.7 volts, which it should be ~8.1 volts based off a sim (not real world). So with some better matching resistors or a pot instead of a resistor in one place, it would come closer to the ~8.1 volts. I put in a 6.4mV signal and got a 750mV signal out for a total gain of 117. Not to shabby. From the sim these seem to be pretty linear setups right until they clip.
So what kind of solid state output stage could a guy (or girl I guess) use with this that would possibly, but not necessarily have some resemblance to a tube output stage? I found that this can't be dc coupled to the next stage, it must have a capacitor on the output.