I think it is the same as mine. Yours is 4.1 too.
Merlin, I'm going to use an old telecom equipment case. Quite robust and heavy, and fits everything nicely inside. Curiosly, this are the only ones where I work that are made in Spain:
http://www.dycec.com/pdf/ADI-SG.pdf
I have tons of router's cases at work, from all diferent sizes and shapes, but almost none of them are suitable for doing casework. Too much plastic, strange shapes and pre-drilled holes 😡 The older ones are the better ones, period.
That's what I used, an old WAN router. I cut out some of it and placed in a sheet of aluminum for some RCAs. It's galvanized steel, but it seems to work without issue.
In fact, isn't steel a magnetic "insulator", and protect from electrical interference too?
like mu-metal?
like mu-metal?
I would prefer it under 11V for both in general. Are your JFETs under the LEDs a bit strong for IDSS? Maybe you could put there your weakest ones and both Vouts shall drop if the LEDs are in a current area that gain Vf fast now.
I have what it seems to be quite enthusiastic leds. They are the ones from the BOM. I've measured 50 of them, and the vast majority are matched at 1,92v.
Seems some kind of pre-matched leds 😀
So the question is, does it matter if the whole Vf is 1,92 x 5 = 9.6v? A bit more above the recommended 9v.
Thanks
Seems some kind of pre-matched leds 😀
So the question is, does it matter if the whole Vf is 1,92 x 5 = 9.6v? A bit more above the recommended 9v.
Thanks
So I try to put 2 weaker K170s for the positive reg? What's a easy way to test Idss for the K170 pls? Should I even fiddle around with the LEDs?
Put a weak 170 in the place of the one you have now on the positive side, the one in line with the 10R. Easy way is with a 9V battery, 100R and a DVM. Google for matching JFETS. To change all leds for lower Vf would be a pain.
I changed both to the weakest ones I have, measuring 0.6+v across 100R and the v+ is now 11.76v, looks like not much decrease! 😛
Maybe you should only change the one in line with the 10R?
Just suggesting to salas, because I don't exactly know how does it works. In fact, I didn't knew anything about IDSS interacting with final voltage.
Sorry for my ignorance in shunt supplies 🙄
Maybe you have 100R instead of 10R in the shunt? If yes, thats a problem. Else the LEDS are too strong.
Checked that, the 100R and 10R are in the right locations. How many V should be the drop across the 5 LEDs?
Hmm, I'm using red, and I'm dropping 11V. My neg string is dropping abt 9.9V. Both 3 LED strings are dropping 6V....
You simply got 2V leds. Positive is supposed to drop more. Take negative as a measure. Listen to it first. I liked it under 11V more but maybe you will like it all well as it is.