Does anyone have PCB layouts for the leach amp that has the output transistor on the PCB? I am looking for a design that is better than the on on Mr. Leach's website
I can accept basically any type of drawing.
Thanks in advance
Johan Wagener
200234315@ctech.ac.za(removethis)
I can accept basically any type of drawing.
Thanks in advance
Johan Wagener
200234315@ctech.ac.za(removethis)
Leach amp PCB with output transistors
Hi,
try this thread (Found via the search function in under 30 seconds 🙂):
http://www.diyaudio.com/forums/showthread.php?s=&threadid=4091&highlight=
\Jens
Hi,
try this thread (Found via the search function in under 30 seconds 🙂):
http://www.diyaudio.com/forums/showthread.php?s=&threadid=4091&highlight=
\Jens
Wagener said:
What do you mean by "better" The main reason the PCB by Dr Leach doesn't have transistors on the PCB is that he chose TO-3 transistors instead of TO-220 or TO-247's.
--
Danny
well. I am looking for a layout that has the to-3 mounted on the pcb.
Why would he not have placed them on the pcb? Its not that hard to heatsink the transistors on a pcb?
Thanks for the replies
Why would he not have placed them on the pcb? Its not that hard to heatsink the transistors on a pcb?
Thanks for the replies
Heatsinking To3 on PCB
Hello,
The reason maybe that the PCB size gets (alot) bigger when you start to mount output transistors on it.
Also if you want to have your output on the PCB I suggest that you put them in line parallel to the heatsink, and use an "L" profile to transfer heat to the heatsink.
There might wery well be another reason that Dr. Leach used output transistors mounted with wires away for the PCB, simply the fact that the L profile is less than optimal seen from a thermal point of view.
\Jens
Hello,
The reason maybe that the PCB size gets (alot) bigger when you start to mount output transistors on it.
Also if you want to have your output on the PCB I suggest that you put them in line parallel to the heatsink, and use an "L" profile to transfer heat to the heatsink.
There might wery well be another reason that Dr. Leach used output transistors mounted with wires away for the PCB, simply the fact that the L profile is less than optimal seen from a thermal point of view.
\Jens
Links to boards with integrated TO-3 devices:
http://home.swipnet.se/malman/LeachAmp.html
http://www.diyaudio.com/forums/showthread.php?s=&threadid=2289&highlight=
http://www.diyaudio.com/forums/showthread.php?s=&threadid=29234&highlight=
--
Brian
http://home.swipnet.se/malman/LeachAmp.html
http://www.diyaudio.com/forums/showthread.php?s=&threadid=2289&highlight=
http://www.diyaudio.com/forums/showthread.php?s=&threadid=29234&highlight=
--
Brian
Hello,
I am quite new memeber in this forum. But I have made leach amp with my own pcb design many unit. I can say that this is the best amp I had ever made. This is my pcb design with output TO-3 (2SC5200/2SA1943)on the board.It is in protel format. Have fun!!
I am quite new memeber in this forum. But I have made leach amp with my own pcb design many unit. I can say that this is the best amp I had ever made. This is my pcb design with output TO-3 (2SC5200/2SA1943)on the board.It is in protel format. Have fun!!
Kon: What is the file format *.pcb in your zip file ??? (TIF ? JPEG or something more special ?)
Greetings
Herman
Greetings
Herman
Hi all,
Sorry for mistake. The file that I had post is not my latest one. So here is my latest pcb. This file is created by using Protel 99 se software. You can modify with your own idea. Have fun!!
Sorry for mistake. The file that I had post is not my latest one. So here is my latest pcb. This file is created by using Protel 99 se software. You can modify with your own idea. Have fun!!
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