You have most likely a too high series resistance in the smoothing. I would like to know the voltage at the LM317/337 input.
In fault tracing you must check if you have 10 V at the minimum in the LM317 for the 5 V and 22 V for the 17 V output. You may be forced to adjust all R1-R10 and R47, R48.
Connect the "-" of the voltage meter to the ground and measure the voltage you have have on the R9, both sides. You have 300 mA out so in my world you should have 2.2*0.3 (= 660 mV) difference. You should have 26-28 V DC. What do you have?
In fault tracing you must check if you have 10 V at the minimum in the LM317 for the 5 V and 22 V for the 17 V output. You may be forced to adjust all R1-R10 and R47, R48.
Connect the "-" of the voltage meter to the ground and measure the voltage you have have on the R9, both sides. You have 300 mA out so in my world you should have 2.2*0.3 (= 660 mV) difference. You should have 26-28 V DC. What do you have?
I get the impression we're talking at cross purposes. Lets start again.
As discussed with you in advance I had the following transformer built:
100VA TT with 4x 20 - 0V AC ( to get one time 400mA@17V DC from each SSR03): 19,7V AC
and 2x 9V - 0 AC ( to get 400mA@17V from the SSR03) seconderys.
I measured at 9V secondarys: 8,5V AC
I measured at the 20V secondarys: 19,7V AC
I own 2x SSR03 for 17V output
I do have 2x 47 ohm, 10W load restistors to test the 17V SSR03
I own 1x SSR03 for 5V output
I do have 2x 10 ohm, 10W load restistors to test the 5V SSR03
All measurements have been made on this setup:
https://s18.postimg.cc/v32j03beh/IMG_20180414_165515373_HDR.jpg' border='0' alt='IMG_20180414_165515373_HDR
@17v SSR03, with conneced load resistors as on the picture
X3: -14,6 and +14,6V DC
17V SSR03: both LED are on
@5v SSR03, with conneced load resistors as on the picture
X3: -3,16 and +3,20V DC
5V SSR03: the two standad LED are on. the second pair is off
You are asking for "voltage between ground and R9 and R10"
which gnd? X1, X2, X3, other gnd?
Are you saying now, the TT isn't sufficient?
As discussed with you in advance I had the following transformer built:
100VA TT with 4x 20 - 0V AC ( to get one time 400mA@17V DC from each SSR03): 19,7V AC
and 2x 9V - 0 AC ( to get 400mA@17V from the SSR03) seconderys.
I measured at 9V secondarys: 8,5V AC
I measured at the 20V secondarys: 19,7V AC
I own 2x SSR03 for 17V output
I do have 2x 47 ohm, 10W load restistors to test the 17V SSR03
I own 1x SSR03 for 5V output
I do have 2x 10 ohm, 10W load restistors to test the 5V SSR03
All measurements have been made on this setup:
https://s18.postimg.cc/v32j03beh/IMG_20180414_165515373_HDR.jpg' border='0' alt='IMG_20180414_165515373_HDR
@17v SSR03, with conneced load resistors as on the picture
X3: -14,6 and +14,6V DC
17V SSR03: both LED are on
@5v SSR03, with conneced load resistors as on the picture
X3: -3,16 and +3,20V DC
5V SSR03: the two standad LED are on. the second pair is off
You are asking for "voltage between ground and R9 and R10"
which gnd? X1, X2, X3, other gnd?
Are you saying now, the TT isn't sufficient?
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Hallo Per-Anders
Measurents without any load resistors installed!
Just for the orientation "R12" is right from R10
The SSR03 which should deliver 20V DC
second tip of the voltmeter is placed X3-GND
26,7 V "R9" 26,6V
26,6V "R10" 26,6V
The SSR03 which should deliver 9V DC
second tip of the voltmeter is placed X3-GND
11,5 V "R9" 11,4V
11,4V "R10" 11,4V
At another conversation you asked for pin 2, 3, 5 and 6 on the opamp.
20V SSR03
N1-pin 6: 10,5; rest = 0
N2-pin 6: 6,5; rest = 0
9V SSR03
N1-pin 6: 9,7; rest = 0
N2-pin 6: 8,3; rest = 0
Do you need any other measurements?
Measurents without any load resistors installed!
Just for the orientation "R12" is right from R10
The SSR03 which should deliver 20V DC
second tip of the voltmeter is placed X3-GND
26,7 V "R9" 26,6V
26,6V "R10" 26,6V
The SSR03 which should deliver 9V DC
second tip of the voltmeter is placed X3-GND
11,5 V "R9" 11,4V
11,4V "R10" 11,4V
At another conversation you asked for pin 2, 3, 5 and 6 on the opamp.
20V SSR03
N1-pin 6: 10,5; rest = 0
N2-pin 6: 6,5; rest = 0
9V SSR03
N1-pin 6: 9,7; rest = 0
N2-pin 6: 8,3; rest = 0
Do you need any other measurements?
It seems that you must adjust the current limitation R47, R48 but how much does your load really consume?
The value of the R47 is 0.65/I where I is the desired limitation level.
When the regulator works perfectly you should have exactly the same voltage on pin 2 and 3 on the opamp. The voltage should be within a few millivolts.
The value of the R47 is 0.65/I where I is the desired limitation level.
When the regulator works perfectly you should have exactly the same voltage on pin 2 and 3 on the opamp. The voltage should be within a few millivolts.
I do not understand...
I tried to put all peaces to a PSU together as mentioned in your BOM.
My first SSR03 was a 15V build and from the measurement everything is fine. The practical operation has not yet been given.
Build 2-4 made some problems. The measurement at point X3 didn't show the results I was hoping for.
What I trying to do now is giving you as much measurements as you need. I hope they are good in that way that you can guide me to better results.
I'm sorry if the measurements may contradict each other. Bt these are the results I get at this time. I try to make them to the best of my knowledge and belief.
I tried to put all peaces to a PSU together as mentioned in your BOM.
My first SSR03 was a 15V build and from the measurement everything is fine. The practical operation has not yet been given.
Build 2-4 made some problems. The measurement at point X3 didn't show the results I was hoping for.
What I trying to do now is giving you as much measurements as you need. I hope they are good in that way that you can guide me to better results.
I'm sorry if the measurements may contradict each other. Bt these are the results I get at this time. I try to make them to the best of my knowledge and belief.
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tin drops on J1-J4?
Yes ;-)
I am in the office now. I will give you the results later today.
The opamp pins are all DC?
I measure the left column of the opamp in combination with the right hole as shown in your text and vis versa, right?
Yes ;-)
I am in the office now. I will give you the results later today.
The opamp pins are all DC?
I measure the left column of the opamp in combination with the right hole as shown in your text and vis versa, right?
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I advice you strongly to read the documentation also so you understand how the regulator works. Take also a close look at the schematics.
Pin 3 is the reference voltage, should be 8.5 V
Pin 2 is the feedback which should be the same as pin 3
Pin 6 is the output and it's important that the voltage is well within the supply voltage of the opamp. In your case it's 17 volts so 3-14 V is OK.
Pin 4 and 7 are supply pins which are swapped on the negative regulators.
Pin 3 is the reference voltage, should be 8.5 V
Pin 2 is the feedback which should be the same as pin 3
Pin 6 is the output and it's important that the voltage is well within the supply voltage of the opamp. In your case it's 17 volts so 3-14 V is OK.
Pin 4 and 7 are supply pins which are swapped on the negative regulators.
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Thanks for the explanation. But I did not find this information on the SSR03 page.
If I could read and understand the schematic, I certainly wouldn't ask all the (maybe stupid) questions. ;-)
Maybe you can say that an SSR03 is not a beginner project. But one can certainly say that I approached the project with a little naivety.
Thanks for your support!!
If I could read and understand the schematic, I certainly wouldn't ask all the (maybe stupid) questions. ;-)
Maybe you can say that an SSR03 is not a beginner project. But one can certainly say that I approached the project with a little naivety.
Thanks for your support!!
both LED are on ;-)
tin drops on J1-J4: YES
X3: no load resistor parallel installed
+ -> gnd: 17,32V DC
- -> gnd: 17,21V DC
opamp N2: results in DC
counting order: dot is 1, then going down the side =4; other side 5, going up=8
the second measuring tip is at X3-gnd;
pin 2: 8,51V
pin 3: 8,51V
pin 4: 16,93V
pin 6: 0
pin 7: 10,38 V
opamp N1:
pin 2: 8,55V
pin 3: 8,55V
pin 4: 0
pin 6: 17,2V
pin 7: 10,51 V
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sorry pin 5 - 8 are wrong...
opamp N2: results in DC
counting order: dot is 1, then going down the side =4; other side 5, going up=8
the second measuring tip is at X3-gnd;
pin 2: 8,51V
pin 3: 8,51V
pin 4: 16,93V
pin 6: 10,38 V
pin 7: 0
opamp N1:
pin 2: 8,55V
pin 3: 8,55V
pin 4: 0
pin 6: 10,51 V
pin 7: 17,2V
opamp N2: results in DC
counting order: dot is 1, then going down the side =4; other side 5, going up=8
the second measuring tip is at X3-gnd;
pin 2: 8,51V
pin 3: 8,51V
pin 4: 16,93V
pin 6: 10,38 V
pin 7: 0
opamp N1:
pin 2: 8,55V
pin 3: 8,55V
pin 4: 0
pin 6: 10,51 V
pin 7: 17,2V
I did not generally fail ;-)
at the end of the day I need 400mA@17V
I connect a 47ohm, 10W load resitor between X3 + -> gnd and - -> gnd
here are the DC results:
+ -14,7 V at X3 measured parallel to the resistors
opamp N2
pin 2: 7,6V
pin 3: 8,2V
pin 4: 14,4V
pin 6: 13,3 V
opamp N1:
pin 2: 7,6V
pin 3: 8,2V
pin 6: 13,22V
pin 7: 14,27V
at the end of the day I need 400mA@17V
I connect a 47ohm, 10W load resitor between X3 + -> gnd and - -> gnd
here are the DC results:
+ -14,7 V at X3 measured parallel to the resistors
opamp N2
pin 2: 7,6V
pin 3: 8,2V
pin 4: 14,4V
pin 6: 13,3 V
opamp N1:
pin 2: 7,6V
pin 3: 8,2V
pin 6: 13,22V
pin 7: 14,27V
May I give you the measurements for the second 17V-SSG03:
both LED are on ;-)
tin drops on J1-J4: YES
X3: no load resistor parallel installed
+ -> gnd: 17,31V DC
- -> gnd: 7,94V DC (seven)
opamp N2: results in DC
counting order: dot is 1, then going down the side =4; other side 5, going up=8
the second measuring tip is at X3-gnd;
pin 2: 3,49V
pin 3: 2,90V
pin 4: 7,63V
pin 6: 1,07V
pin 7: 0V
opamp N1:
pin 2: 8,55V
pin 3: 8,55V
pin 4: 0
pin 6: 10,53V
pin 7: 17,02 V
both LED are on ;-)
tin drops on J1-J4: YES
X3: no load resistor parallel installed
+ -> gnd: 17,31V DC
- -> gnd: 7,94V DC (seven)
opamp N2: results in DC
counting order: dot is 1, then going down the side =4; other side 5, going up=8
the second measuring tip is at X3-gnd;
pin 2: 3,49V
pin 3: 2,90V
pin 4: 7,63V
pin 6: 1,07V
pin 7: 0V
opamp N1:
pin 2: 8,55V
pin 3: 8,55V
pin 4: 0
pin 6: 10,53V
pin 7: 17,02 V
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