I tried this simulator and a major error came up trying to exit. It froze my computer and would not shut down. Why? I am not experienced enough to figure it out.

Thanks to you I have TEX up and running fine with DOS-BOX.

I downloaded Pspice and it comes Zipped. How do I set it up to use? Do I need a windows emulator or DosBox? Can anybody help? Later on today I ran across a web site called faculty.physics.tamu.edu/duller/pspice/pspice71.html. On it was all the files of pspice and directions for installing the program. It is up and running, so thanks any ways. Sorry about the post it can be deleted if management wishes. The other site is necessary with your WinZip in the downloads area. If you wish I will find the correct link for all in the future. Pspice works good on windows XP 32bit.

Two positive power supplys hooked together the right way work out to one power supply with +/- & gnd.
The trick acording to Electronics For Dummies and or The Idiots guide to electronics is int the way the binding posts are hooked together so two Identicle 1 to 50vdc power supplys become +1 to +50vdc/-1 to -50vdc and circuit common. Make voltages as close as possible and amperage as close as possible and your circuit will just be doubled then jumpers together inside the box to three outputs. Yellow/Black/Red. I can supply the rough drawing to check out if you desire.

What I have is a idea I need technical advise about. Needs 36vdc @ 4A. Transformer in front of this board
24vac @ 5A. A normal power supply of same transformer Bridge rectifier and 4700uf @ 50wvdc comes out the end at 36vdc. How will these parts work out as I need help figureing out which formula's to use. I need to be near as possible to 36vdc out the end for two 12-Watt amplifier boards. Are my calculations correct? Thankyou.

I have tried everything and investigated Command promt useing google search. My problem is I don't understand the necessary commands to turn this into a working program. Can anybody help in assisting a new person to command prompt inputs? Thanks

Thanks for the info, I am trying out LTSpice ASAP. The attachment is some work I did with voltages and currents and Beta. Are my firures right as the two output transistors in ProtoLab are Ideal not Tip31C &
Tip32C. You schematic put the voltages right on the money thou. I will research the link you gave me also.
Either way a new metal box with a capacitance multiplier power supply is in the near future.

I will check your Spice advise ASAP Thankyou. As far as useless 2.2k resistor and changing the other 2.2k to 1k and finally adding the capacitor a question arises. The construction article in G. Randy Sloans book
states that both resistors are used to keep the supply voltage at 18.0 volts at the center node to keep the voltage at emitters of Q4 & Q6 close to 18.0 volts. If that is necessary why remove the voltage devider
and raise the voltage at emitter legs? What is bootstraping as I cannot find that Termonology or definition
anywhere. Thankyou

The schematic is a ProtoLab simulation program. Problem is the transistors are Ideal not the specified
2N3906, 2N3904, Tip31C & Tip32C. Do you know and can recomend a better simulation program where I can stipulate the correct part # and data sheet? I am askeing you because I have been following your
name for a while and like your advise. I am printing this topic and studying it to redo a plastic box in
metal till final box no hum. Thankyou

Thankyou. I have downloaded your piece of work and will study all your posts today. One question concerning the two 100ohm resistors. Is the milliamps to the TO-92 transistors right per ohms law and data sheets? I receive different replys conserning that am trying to study the circuit with ProtoLab to figure that aspect of circuit design. The  design works but with hum. The additional capacitor and 1k RC circuit are for that purpose.
A capacitance mutliplier power supply is also being designed for a revised box.

If I have the origional folder called TEX on my desktop and open it and place DOSBox into it will that suffice or does the folder have to be installed in C:/ drive to work properly. That is my problem as someone inexperienced I don't have the knoledge therfore the confidence that I am doing it the right way from the beginning.

Thankyou for the post. I am busy for the moment but will print your reply and study it carefully. I am new but accept critism well enough. Tanks

Becuase I am new to this. How to do this the right way? That is why I post. Not due to my being a person
who is a know it all type. How would you show a student the right way? Thanks for the post thou, I do not
get mad at anything. I need all the help I can get.

AS a newbi to electronics I have a simulation question. Am I correct that total amps can be measured in attached circuit accurately? Schematic  called for 2 Amps but did not include RC circuit addition for hum
problem. Transistors used were ProtoLab ideal as the program is limited in choices. Ideal or 2N2907 ect.