mstechca
New Member
Shown is a ridiculously simplified block diagram of my receiver. DET means detector (or the superregen detector to be specific).
I find that using the same value pull-up resistors in each section of my receiver does a good job, but I don't think it does the best job because there is still alot of noise in my receiver. I have played with tuning controls as well. One station that is supposed to come in clear, doesn't come in clear without a ridiculously long antenna connected to ground.
I think that the resistors must be connected in certain ways to obtain the best results. I have tried different methods, all without success.
Is it always better to have just one pull-up resistor, and have each stage hog the current from the last resistor? (in other words, all resistors in series, and between any two resistors the connection point to any stage)
Or to word it even better, Should I connect a resistor between + and the power amp, and connect a resistor from the power amp to the next amp, and do the same until I get to the detector stage?
I want to minimize noise as much as possible.
I find that using the same value pull-up resistors in each section of my receiver does a good job, but I don't think it does the best job because there is still alot of noise in my receiver. I have played with tuning controls as well. One station that is supposed to come in clear, doesn't come in clear without a ridiculously long antenna connected to ground.
I think that the resistors must be connected in certain ways to obtain the best results. I have tried different methods, all without success.
Is it always better to have just one pull-up resistor, and have each stage hog the current from the last resistor? (in other words, all resistors in series, and between any two resistors the connection point to any stage)
Or to word it even better, Should I connect a resistor between + and the power amp, and connect a resistor from the power amp to the next amp, and do the same until I get to the detector stage?
I want to minimize noise as much as possible.