"(...) I’m not sure you do either."[quote spoiler] I am 100% sure, absolutely.
I am only asking for the measured voltage across R1 - thats right and all.
I need to relax more, in Germany it is now time to go in bed and take a deep sleep.
If you like to battle, your are welcome - i am also an old Judoka.
I am only asking for the measured voltage across R1 - thats right and all.
I need to relax more, in Germany it is now time to go in bed and take a deep sleep.
If you like to battle, your are welcome - i am also an old Judoka.
Last edited:
My boards are finished, but I'm still working out a chassis, either permanent, or temporary if I get the official version. Also, I had intended to try it first with one of my own PS board assemblies (lower Voltage example shown), but realized I have already used the 0-15, 0-15 flat pack transformer I had, so now I'm waiting for parts to complete the project-specific PS.
In the meantime, I will wire up some signal connections, connect my reverse-RIAA circuit, and run some initial function/noise tests with my lab power supply.
In the meantime, I will wire up some signal connections, connect my reverse-RIAA circuit, and run some initial function/noise tests with my lab power supply.
I’m not battling. Why are you so defensive?? I hope you sleep well. It could help. “Judoka??” OK, sport."(...) I’m not sure you do either."[quote spoiler] I am 100% sure, absolutely.
I am only asking for the measured voltage across R1 - thats right and all.
I need to relax more, in Germany it is now time to go in bed and take a deep sleep.
If you like to battle, your are welcome - i am also an old Judoka.
Still, why are you asking me to measure voltage across an R1 that doesn’t actually exist yet, except with Wayne, 6L6, GKTAUDIO and a few lucky folk with PCBs?? That’s the only reason i didn’t answer your question: ain’t nuttin’ yet to measure.
I intend to use ADA4898-2 for my P3 built (if I am lucky to get a kit).
In data sheet they do not show the schematic diagram for how the opamp "looks" inside as they do in may other opamp data sheets.
Does anybody have information how schematic looks?
It is just pure interest and maybe also to verify if the output circuit looks like it will work in P3.
In data sheet they do not show the schematic diagram for how the opamp "looks" inside as they do in may other opamp data sheets.
Does anybody have information how schematic looks?
It is just pure interest and maybe also to verify if the output circuit looks like it will work in P3.
...How does one measure Süß Sauße?
There are countless audio details that aren't quantifiable when the whole is considered—and each person has their own preferences and ideas and around and around and around we go. I like to build everything that is reasonably possible and figure out what I like, it's fun to discuss, but what I hear and what measures as what—not very informative to me—and frequently meaningless. I have at least 5 phono pres at arms length, and as many arms and carts—they are ALL good and some are better—and it's fun to go back and forth....each combo of cart and pre and arm is a different canvas...
Just my experience... not more or less valid or relevant than anyone elses..... HUGE thanks to Wayne and 6L6 and Nelson of course for all the continued funness... and all the superbly smart people who are on this crazy-audio-quest ride!
There are countless audio details that aren't quantifiable when the whole is considered—and each person has their own preferences and ideas and around and around and around we go. I like to build everything that is reasonably possible and figure out what I like, it's fun to discuss, but what I hear and what measures as what—not very informative to me—and frequently meaningless. I have at least 5 phono pres at arms length, and as many arms and carts—they are ALL good and some are better—and it's fun to go back and forth....each combo of cart and pre and arm is a different canvas...
Just my experience... not more or less valid or relevant than anyone elses..... HUGE thanks to Wayne and 6L6 and Nelson of course for all the continued funness... and all the superbly smart people who are on this crazy-audio-quest ride!
I am only asking for the measured voltage across R1 - thats right and all.
I need to relax more, in Germany it is now time to go in bed and take a deep sleep.
If you like to battle, your are welcome - i am also an old Judoka.
Hello,
E = I * R
R := 750
I ~= to 0.010 Amps
E ~= 0.010 * 750 or 7.5 Volts
That is about what I measured on my P3 assembled breadboard.
Thanks DT
Dear Helge,
For us who are not native speakers of English all kinds of errors are forgiven on this very open and friendly forum. However names can be spelled without error. So please use the right spelling for WAYNE when you are answering him. It is just being polite and the continuous wrong spelling you use is worrying me for its meaning in your own language😉.
All the best,
Leo
Pay attention to the classification of Idss:6L6 measured 5.38V (2SK209) over 750R and Wayne 9.1V (2SK170) as I read it.
Would it be an advantage to adapt circuit for those using 2SK209 to get a higer bias current?
Maybe they get too hot.......need to calculate......and look at data sheet.....
GR is 2,6mA to 6,5mA
BL is 6mA to 12mA
V is 10mA to 20mA
Wayne mention he use BL-type and Jim mention he use GR-type.
VGS(Wayne) aproxy -151mV
and
VGS(Jim) aproxy -90mV
Last edited:
Consulting the datasheets is a brilliant idea, MEPER.
Now it's is time for completing the static measurement of the inputstage. All other voltages /potentials against GND. I am interesting in the following note's:
Drain of Q1,2,3,4 (is equal to the Emitter of Q5)
and
Base of Q5
and also
Collector of Q5
Thats all - "Standardtest" to look at the workingpoints and check firstly: is anything all right?
Now it's is time for completing the static measurement of the inputstage. All other voltages /potentials against GND. I am interesting in the following note's:
Drain of Q1,2,3,4 (is equal to the Emitter of Q5)
and
Base of Q5
and also
Collector of Q5
Thats all - "Standardtest" to look at the workingpoints and check firstly: is anything all right?
The choice of the operating or workingpoint (free for the german terminus) is essential (for the amount of distortion, and the noisefigur in dB).
Idss is not only crucial, it is also the pinchoff "Abschnürspannung" -Up.
Sorry, i am a little bit ill today - all my folks and colleagues suffer from /under fresh coronainfection ... and so on
Idss is not only crucial, it is also the pinchoff "Abschnürspannung" -Up.
Sorry, i am a little bit ill today - all my folks and colleagues suffer from /under fresh coronainfection ... and so on
