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Old 19th June 2003, 09:54 AM   #1
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Default Switchercad symbols

Hi guys,

Anyone using switchercad? It is a free spice type program. That I use purely for schematics. Adding new symbols used to be hell!
Now it is done quite easily from inside SWCAD. I've drawn a couple of symbols.

Check it out..
http://home.zonnet.nl/horneman/swcad.htm

Regards,
Bas
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Old 19th June 2003, 10:40 AM   #2
dhaen is offline dhaen  Europe
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Hi Bas,

Thanks for the update. New parts are always the time consuming part of all these "schemes".
Because I'm conversent with it, I have been using my old schematic capture / PCB program, but it does draw sh1tty schema's. Maybe I'll try Swcad again.

Oops: the anodes and cathodes are transposed on your linked EY81 example

Cheers,
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Old 19th June 2003, 10:51 AM   #3
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Quote:
Oops: the anodes and cathodes are transposed on your linked EY81 example

Ooops indeed..thanks!.....

Do you know something? I actually have them the wrong way around in my pre-amp as well!!!

I have the top cap as out!

Does it matter? Apparently not!!!!

Cheers,
Bas

{Edit}...just noticed there is more wrong...one transformer HT lead is to ground...ehm...eham...(beavis and butthead laugh)
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Old 19th June 2003, 10:59 AM   #4
dhaen is offline dhaen  Europe
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Bas,

The topcap IS out, at least for positive supplies.
Unusually, boostdiodes have the cathode connectd to the topcap.
I think you knew this, and made a "double-switch" mentally.

Cheers,
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Old 19th June 2003, 11:08 AM   #5
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Quote:
The topcap IS out, at least for positive supplies
One part of me is happy. (Did it right in the first place)
The other is dissapointed ( Thought if I changed it around, the sound would improve no end!!)

Cheers,
Bas
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Old 19th June 2003, 11:11 AM   #6
dhaen is offline dhaen  Europe
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Anyway Bas, how are your Linear Technology $hares doing nowdays?
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Old 19th June 2003, 02:10 PM   #7
Joel is offline Joel  United States
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Thanks for the tip Bas. I'm always looking for an alternative to MS Paint and my modified TubeCad symbols, which I'm using now. Talk about time consuming...
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Old 19th June 2003, 02:18 PM   #8
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Hi Joel,

Glad I could help..creating your own symbols is easy..Usually I just take an existing shape and modify and save under different name.

Quote:
Linear Technology $hares doing nowdays
Going up!

Cheers,
Bas
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Old 22nd July 2004, 12:51 PM   #9
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Default Seems to be another update of SWCad

this is a link to an executable file -- July 21, 2004 version of Switchercad:

http://ltspice.linear.com/software/swcadiii.exe
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Old 23rd July 2004, 08:41 AM   #10
hifiZen is offline hifiZen  Canada
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Anyone have a good 6DJ8 model that works properly in SWCAD / LTSPICE? I've been trying to use the "generic triode model" NH6DJ8 from Duncan's Amp website, but it keeps giving me the error "doAnalysis: Matrix is singular". No problem with the NH12AT7 or NH12AU7 models, though, so it's gotta be something specific to the 6DJ8 parameters. For now, I'm using the older 6DJ8 model from Duncan's Amp site. Ideas anyone? Is there a fix for this problem ... perhaps just a setting somewhere?
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