Gap Recordings Namibia

@Starichok Yes, That is a good point, I did not think of that. In my final build I will do that, Thank you for the insight. Regards Charles

Yes, but I have four 12VDC fans on the same 12V rail for power transistor heatsink each fan draws 690mA, that is why I the transistor in. Again, Thank you for your patience. Regards Charles

@Starichok Thank you very much I will do so, on your advice. For R20 I am using 0.11Ω 5W resistor (3x 0.33Ω 5W in parallel) I am aiming for 5 Amperes maximum. For VT2 I am using NPN BD139 and for VT4 I am using 2x PNP 2SB1560 with 0.1Ω 5w resistors on the collectors of the transistors. Right now I am unable to source TL431 so I am using LM7812 with TIP 3055 NPN transistor follower for current amplification. (I am also supplying the fans for the heatsink from there. I will be excluding R10 as I am using 10K multi turn pot. What would you advise for lower current limit? I think with my 18V laptop supply, with the 300Ω resistor gives 150mA I can not remember. Once again Thank you for your patience with me. Regards Charles

@Starichok I would like to ask one more thing if I may please? The setup procedures for the circuit, I downloaded the txt file left by Oleg, but! Google does not translate very well. Could you possibly help me with those to please? Agin, thank you very much. Regards Charles

@Starichok THANK YOU THANK YOU THANK YOU, That is all I can Say. Regards Charles.

@Starichok I understand, Thank you for your patience with me. I will now await the V11 Schematic with the english notations so that I may fully understand what what has been designed. I only find V9 and then V11 from Oleg in .JPG format, the V10 (V0.zip he posted on page 6, December 3, 2010) has one file with the .lay format. I do not poses the software to open it though. Again, Thank you very much.. Regards. Charles

@Starichok The second Question I have if I may ask please. R17 in V11, I only have a 10 turn 10K available, this only starts working from about half way in, +- 5 turns and it then only switches the current output on. do you perhaps know how I might use this pot rather than buy a new one? Again, Thank you for your help. Regards Charles

@Starichok Good day! Thank you for getting back to me! I see now going back the circuit that Oleg used and built up for his donner BP was V11 the one I have. And am currently building up. I must commend you both. This supply is the first one I have built up and it just works, there are no oscillations at all. It is truly a work of art and all I am able to say is thank you to the both of you, it is so simplistic in its operation but so so clean on the output. My congratulations to both you and Oleg on this design! Below I have attached the JPG, Thank you for agreeing to help. May I ask, once I am done with this supply may I show it on my channel? Obviously, the correct credit will be given. Many thanks. Regards Charles

@Starichok and @olegrmz Good day I am english so please forgive me if this is not conveyed properly. I have been using google translate and have been pouring through this forum now for a few days, There is a lot of nonsense in between SO MUCH useful teachings from you both. I am unable to register an account as it seem that something is not being translated properly in the security question. Oleg, or Starichok, am I correct in assuming that the version that you built and used ended at version 12? Can you please confirm this? I would like to copy your circuits and build this for myself, but I fear that the language barrier may get me in trouble, Could one of you please post a circuit that was last used with succes using only the two opamps? The circuits I am seeing on the forum has annotations in (Russian or Cyrillic) that google can't translate as it is a picture. ANY help would be much appreciated, And A big thank you to both of you for all the effort.