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Family_Dog 24th September 2004 11:02 AM

CAD Program for Tubes
Hi All-

I was wondering if anyone knows of a CAD program which is tube compatible, and either free, or at low-cost.

I am not at all artistic, my hand-drawn straight lines are skew, my resistors look like a drunken worm, my caps are reasonable, and coils & transformers are well-nigh impossible for me to draw freehand.


316a 24th September 2004 11:17 AM

Hello ,
Tubepad is free and works by using symbold exported into Paint . Do a search on Google , you'll soon find it

cheers :)


Family_Dog 24th September 2004 07:13 PM

Hi 316a,

Got it, thanks! Fascinating little program :)


Geek 25th September 2004 02:34 AM

If you want real-time Spice simulation for tube projects, check out:

There are tons of custom made spice models for other tubes available from the web, like from here:


I have a few too that I should post some day ;)

Family_Dog 25th September 2004 05:03 PM

Hi Gregg,

Many thanks! The Student Version works like a charm for me :)


Nisbeth 25th September 2004 05:06 PM

The PCB cad package Eagle (from has a free library of tube symbols available for download on their website. :)


Family_Dog 25th September 2004 05:37 PM

Hi Nisbeth,

I gather I would just download what I require from their Libraries in the Downloads section and copy it over to the "Models"Folder. Thanks, am doing so now.


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