Here's the link to the sch file library indexhttp://el34world.com/charts/SchFiles.php
I see this asked all the time and so I set up this sticky post.
If you want to open the .sch files here on the forum, you have to Download one of the programs below
Download link for ExpressPCB/ExpressSchhttp://www.expresspcb.com/expresspcbhtm/Download.htm
Jschem is a java based program that works on any platform
Jschem can import .sch files
Download link for Jschemhttp://dhost.info/jschem/Custom tube amp components for Express SCH
Here's is a zip file with all my .sch tube amp symbolsMy .sch components collection
See this post about adding custom componentshttp://el34world.com/Forum/index.php?topic=590.0
Unzip the file and copy all the files inside to the SchComponents_Custom folder after you have installed Express PCB/SCH
My first tip is that Jschem can import .sch files and export them in several formats like (PDF, JPG, GIF, PNG)
There's no need to do this in ExpressSch.
Use the pull down menu to expose all the different file types that Jschem can save your .sch file as.
Save your file as .gif or .png
.jpg is for photo images, the quality is not very good for line drawing type images. jpg leaves lots of little artifacts around the lines.
Here's two ways I do it in ExpressSch
ExpressSch can only export as Bitmap .bmp files
.bmp are drawing files, but they are way larger than .gif files
But you can open a .bmp file in your favorite drawing program and then save it as a .gif file
I use paint shop pro to do this
Open the .sch file in ExpressSch
Go to the File menu and pick Export Schematic image
Export the sch drawing as a Bitmap file
Open the .bmp file in your drawing program ( I use Paint shop pro)
Edit the file, crop it down, etc
Save the file as a .gif file in your drawing program.
You can capture screen shots on PC's
This is handy if you just want to grab a quick shot of anything displayed on your screen.
You can grab just a small section of a drawing, like just one tube, zoom in very close on something, etc
Whatever you capture gets put onto the Windows clipboard as temp storage.
Then your drawing program can access the windows clipboard to get that data.
The images in this post are all screen shots.
Position the drawing or whatever you want to copy on your screen so you can see it.
Hit the PrtSc or Print Screen button
on your keyboard (upper right on most windows keyboards)
You may have to hit shift or function to get the Print Screen button to capture.
Open your favorite drawing program
Find the Paste as new Image
function, (most likely in the edit menu.)
I use Paint shop pro, but I am sure most drawing programs are able to do this.
Modify the image, crop it, etc and then save it as a .gif or .png