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Old 21st March 2013, 03:39 AM   #1791
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Join Date: Oct 2009
Location: Brunei
Quote:
Originally Posted by Joachim Gerhard View Post
Our friend in Brunei got really mad. I said : look if you have reversed something.
He said NO: Then he found that he had reversed ALL Leds because he has mis interpretted the lettering. And so it goes...
LOL

Hairpullingly mad!!!

Maaaad, I tell you, maaaad!
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Old 21st March 2013, 09:09 AM   #1792
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Good morning all
Just for clarity
Is Q107 R108
and Q207 R208 that need changing?

I got a stash of 2SK107BL from Mouser from time to time they do get same so place your order and eventually they will arrive.

I am going to try those this morning, if SHE lets me, I don't have the J113 but I will get same for the R3 boards.

Last edited by Bksabath; 21st March 2013 at 09:11 AM.
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Old 21st March 2013, 09:14 AM   #1793
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Quote:
Originally Posted by studiostevus View Post
LOL

Hairpullingly mad!!!

Maaaad, I tell you, maaaad!
Yeah I remember early days when same XXXX could not get the thing to work and started to rip thing apart.
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Old 21st March 2013, 09:39 AM   #1794
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I have been re-reading the build guide
Quote from Paradise R3 Assembly and trubleshooting guide .

My
recommendation would be to use values around 400 for both N and P for the input stage, whereas
the other parts of the circuit can use higher gains (but please make sure you have those decoupling
caps in place on the bottom side of the PCB)
.


It sems to contradict recent posts...

I believe that Joachim mentioned advantages to be had if the Imput stage has hi Hfe is this correct?

I have NPN up to 550 and PNP over 600

Paradise BCXXX-40

Last edited by Bksabath; 21st March 2013 at 09:47 AM.
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Old 21st March 2013, 09:43 AM   #1795
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Studio, i hope you can stand that joke. Reversal happened to me too, also swapping P and N.
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Old 21st March 2013, 09:48 AM   #1796
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The advantage of higher Hfe in the input stage is less base current so less DC into the cartridge. On the other hand we have an offset trim in the R3.
In the beginning we thought that very high Hfe in the input stage can provoke oscillation.
As far as i know that is not the case.
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Old 21st March 2013, 10:23 AM   #1797
FdW is offline FdW  Netherlands
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Location: Both feet on the ground (near Gouda)
Quote:
Originally Posted by Bksabath View Post
Good morning all
Just for clarity
Is Q107 R108
and Q207 R208 that need changing?

I got a stash of 2SK107BL from Mouser from time to time they do get same so place your order and eventually they will arrive.

I am going to try those this morning, if SHE lets me, I don't have the J113 but I will get same for the R3 boards.
If you have a model of the 2SK107BL, will you post it?
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Old 21st March 2013, 10:52 AM   #1798
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Sorry I don't I do not use the simulator much maybe Riccardo
But I be happy to send you a few 2SK170BL if you need them
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Old 21st March 2013, 11:35 AM   #1799
FdW is offline FdW  Netherlands
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Quote:
Originally Posted by Bksabath View Post
Sorry I don't I do not use the simulator much maybe Riccardo
But I be happy to send you a few 2SK170BL if you need them
I just wanted to add them to the graph, if suitable.
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Old 21st March 2013, 11:40 AM   #1800
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Quote:
Originally Posted by Joachim Gerhard View Post
Studio, i hope you can stand that joke. Reversal happened to me too, also swapping P and N.
Haha sure!
I still try to blame it on the silkscreen being inconsistent
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