I'm giving the A40 another try. I etched new boards to the correct scale. Looking back I see the the schematic in post # 4026 and it shows the input filter as 100R/100p but the schematic in post #4329 it is 470R/470p. Which is correct?
Thanks, Terry
Thanks, Terry
I also just notice that the servo is changed to 470K. Should that be 470k?
Do it JuanHello guys I was just playing with the Preamp SB 3.1 and A33 together
maybe .... I will make preamp SB 3.1 later
Regards
Juan
Do it Juan
Make a buffer ,we have so many amplifiers.....it is absolutely nessecery.:
Something simple using common bgt.
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Hello guys I was just playing with the Preamp SB 3.1 and A33 together
maybe .... I will make preamp SB 3.1 later
Regards
Juan
P30 is preamp made for A33
Regards
P30 is preamp made for A33
Regards
In what post is the P30 mister Mile ?
yes guys
I did not notice but we constantly made amps and more amps but not much about pre-amp layouts maybe a simple single side can be made to get a bit more input signal for the amps we have , my PC is my source of audio can only give some mV of output but with the pre-amp I can get about 1.5Vp out of the pre-amp but if mister Mile recommended de P30 with time I can make both, for now I'm saving some money now to order the A33 so that will be next month "maybe" so meanwhile I can spend some time making the preamp layouts with time of course Regards
Juan
Attachments
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I found the P30 schematic
the supply circuit is also here in the 100W Ultimate Fidelity Amplifier thread mister Mile ? ok, ok, I will search here mister Mile I don't want to bother you too much jejejejeje
Regards
Juan
Use this simple psu for SB3.1
Regards
Attachments
Attachments
Sorry that I post too many times
Regards
Juan
Whole circuit is preamp, blue is input buffer and green gain stage.
Regards
Hey Terry
you where looking for a preamp ? this is not the same as the one you was looking for and I think you might want to try out, it came out too big but I think is better because that will make it a lot easier to etched the traces are lot thicker than usual I mean if you want it to try out, let me first check everything a couple of time before I post the PDF files, here is the image
maybe later or tomorrow
Regards
Juan
you where looking for a preamp ? this is not the same as the one you was looking for and I think you might want to try out, it came out too big but I think is better because that will make it a lot easier to etched the traces are lot thicker than usual I mean if you want it to try out, let me first check everything a couple of time before I post the PDF files, here is the image
maybe later or tomorrow
Regards
Juan
