PSpice help needed
 

I've started using PSpice as part homebrewing and design efforts. It
is very interesting, and a great way to check out ideas before
committing them to actual PC boards.

Some questions:

The version I downloaded has some limitations in the parts libraries.
For example, I can't find many of the common parts used by ham
homebrewers: MPf102 JFETS, NE602 mixers, etc. Where can I find the
PSpice models of these parts? Has anyone developed a library of ham
homebrew .MOD files for the parts we use?

I've (sort of) figured out how to put an impedance matching transformer
into the circuits. I select what they call a "non-linear" transformer
(bad name I think) and this allows me to set the coupling coefficient
and the turns on the primary and the secondary. But what about the
core material, toroid vice no-toried, bifilar windings, etc. Is there
a way of plugging in the kinds of toroids we use?

Also, I'd be interested in hearing from other amateur homebrewers who
are using Pspice in their solder-melting activities.

Thanks and 73

Bill N2CQR M0HBR CU2JL
http://www.qsl.net/n2cqr

wrote:
I've started using PSpice as part homebrewing and design efforts. It
is very interesting, and a great way to check out ideas before
committing them to actual PC boards.

Some questions:

The version I downloaded has some limitations in the parts libraries.
For example, I can't find many of the common parts used by ham
homebrewers: MPf102 JFETS, NE602 mixers, etc. Where can I find the
PSpice models of these parts? Has anyone developed a library of ham
homebrew .MOD files for the parts we use?

I've (sort of) figured out how to put an impedance matching transformer
into the circuits. I select what they call a "non-linear" transformer
(bad name I think) and this allows me to set the coupling coefficient
and the turns on the primary and the secondary. But what about the
core material, toroid vice no-toried, bifilar windings, etc. Is there
a way of plugging in the kinds of toroids we use?

Also, I'd be interested in hearing from other amateur homebrewers who
are using Pspice in their solder-melting activities.

Thanks and 73

Bill N2CQR M0HBR CU2JL
http://www.qsl.net/n2cqr

There is a very active Spice group (though focused on LTspice, free
from Linear Technology) in Yahoo Groups, but they have a few thousand
subscribers, many well versed on all aspects of Spice. You might
consider joining that group to get answers to your Spice questions.
http://groups.yahoo.com/group/LTspice/

Chuck Adams has a lot of spice models for typical homebrew components
available on his web site, www.k7qo.net. He has a nice tutorial in the QRP
Homebrewer, I think you can still get issue number 5. Also, the QRP-L
archives CD has a lot of models (they may be mostly the same as Chuck
though). The CD is available through QRP-ARCI.

Most manufacturers provide models of their parts, so often googling the part
number will land you on a spice model.

...


wrote in message
ups.com...
I've started using PSpice as part homebrewing and design efforts. It
is very interesting, and a great way to check out ideas before
committing them to actual PC boards.

Some questions:

The version I downloaded has some limitations in the parts libraries.
For example, I can't find many of the common parts used by ham
homebrewers: MPf102 JFETS, NE602 mixers, etc. Where can I find the
PSpice models of these parts? Has anyone developed a library of ham
homebrew .MOD files for the parts we use?

I've (sort of) figured out how to put an impedance matching transformer
into the circuits. I select what they call a "non-linear" transformer
(bad name I think) and this allows me to set the coupling coefficient
and the turns on the primary and the secondary. But what about the
core material, toroid vice no-toried, bifilar windings, etc. Is there
a way of plugging in the kinds of toroids we use?

Also, I'd be interested in hearing from other amateur homebrewers who
are using Pspice in their solder-melting activities.

Thanks and 73

Bill N2CQR M0HBR CU2JL
http://www.qsl.net/n2cqr

wrote in message
ups.com...
I've started using PSpice as part homebrewing and design efforts. It
is very interesting, and a great way to check out ideas before
committing them to actual PC boards.

Some questions:

The version I downloaded has some limitations in the parts libraries.
For example, I can't find many of the common parts used by ham
homebrewers: MPf102 JFETS, NE602 mixers, etc. Where can I find the
PSpice models of these parts? Has anyone developed a library of ham
homebrew .MOD files for the parts we use?

I've (sort of) figured out how to put an impedance matching transformer
into the circuits. I select what they call a "non-linear" transformer

check out the banter at the sci.electronics.cad newsgroup --
you can also google spice models

oh, for transformers -- use a current dependent voltage source -- then you
can add coupling capacitance, primary and secondary leakage inductance
etc -- unfortunately it works down to D.C.