Thanks for the help. I will try the circuits again separately, and let you know my results. Thanks again for all the help. Any other suggestions would also be greatly appreciated. Thanks.
I made the changes that you suggested and tested with sine wave signal input to the tube buffer and the results seemed ok. The phase is inverted which is correct for a plate follower and the gain is just a little over 1.
I built the chipamp using the pcb from Peter Daniel and I have the pcb setup like Peter suggests in his schematic. I have an input resistor of 220 ohm. Should I use the 22k from the Vin+ pin to the ground on the LM3875 or should I use a higher value, as my schematic has an input resistor of 10K? Also I don't have much space on the board and have no connections to ground, so how do you suggest inserting the resistor from the Vin+ pin to ground?
I am going to try the two circuits together later today when I am able to go to the lab again. Thanks again for all your help.
I built the chipamp using the pcb from Peter Daniel and I have the pcb setup like Peter suggests in his schematic. I have an input resistor of 220 ohm. Should I use the 22k from the Vin+ pin to the ground on the LM3875 or should I use a higher value, as my schematic has an input resistor of 10K? Also I don't have much space on the board and have no connections to ground, so how do you suggest inserting the resistor from the Vin+ pin to ground?
I am going to try the two circuits together later today when I am able to go to the lab again. Thanks again for all your help.
Sorry I didn't see your post...
I'm not sure what resistor you are talking about... If you got one with the PD pcb, I'd go with the value recommended with it's circuit diagrame. You can put the resistor from ground to Input on the back of the RCA socket.
I'm not sure what resistor you are talking about... If you got one with the PD pcb, I'd go with the value recommended with it's circuit diagrame. You can put the resistor from ground to Input on the back of the RCA socket.
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