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  1. K

    Simulation of 12-Watt Amp Help

    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...
  2. K

    Simulation of 12-Watt Amp Help

    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...
  3. K

    Simulation of 12-Watt Amp Help

    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...
  4. K

    Simulation of 12-Watt Amp Help

    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...
  5. K

    simulation help needed

    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...
  6. K

    Simulation of 12-Watt Amp Help

    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
  7. K

    Simulation of 12-Watt Amp Help

    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.
  8. K

    Simulation of 12-Watt Amp Help

    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...
  9. K

    simulation help needed

    I now have a shortcut to DOSBox0.7... on my computer screen. I am operateing Windows XP Professional 32 system. Could you please describe in detail how to link the program together properly as I am new to that type of program. I only have done complete programs and need to learn. Thankyou.
  10. K

    Tina verses Protolab

    Does anyone know these two programs as to which is better?  I need transistors single supply and op-amps all pass type for audio circuits mainly.
  11. K

    simulation help needed

    http://www.electronics-lab.com/downloads/schematic/001/index.html It is the first software called Electronic Circuit Designer, file dowloads as Tex.zip. Download goes ok and unzipping it works but link error message between to parts of it produces a error message. Can anybody advise me in...
  12. K

    Need help in 4th-Order Source Follower Lowpass Filter design

    From a newbi to this post there is a freeware and paid program called FilterWiz. It has what is mentioned here plus all opamp choices ect with necessary parameters.
  13. K

    simulation help needed

    I downloaded tex off your site and opened it and nee a question answered. A error message that says A temporary file used fo intialzation could not be created or could not be written to, make sure the didectory path exists. I opperate on windows XP Professional 32 bit. How do I accomplish this...
  14. K

    Choosing a SPICE program

    I am a newbi to all of this but you might want to try a free thirty day periiod of Tina. It ha schematic capture, parts lists, the asbility to do spice things and copperclad board in one complete program. If you can not find the download site give me a message and I will guide you there. There...
  15. K

    Data Sheet Needed

    I need assistance with a dot matrix type board display marked as follows. LTAABO1M 101THAILAND. I need to figure out the legs of it to find a way to turn a 10 X 12 into a 10 X 10 for a Audio Logic Analizer.
  16. K

    Parts Identification Help Needed

    Can this transformer act like a normal transformer without all of those parts for the VCR? I have two and need to be sure to build two power supplys. One will be a LM350 Adjustable used at 12VDC @ 2-3Amps. The other will be a dual rail 12VDC @ 1.5Amp each. Where can I search for a parts list for...
  17. K

    Electronic Circuit Help

    Just a final note from the author: I redid the board with a 8 leg IC  Part # ua741 and project is complete. The board was redone in Eagle only one sided instead of origional two sided type. It worked the first time out. Thanks for assistance to all.
  18. K

    Parts Identification Help Needed

    >:(I have a question I need assistance with conserning enclosed gif 1. The four parts surrounding the rectifier what are they and what is their function in this schematic. I am confused they look like resistors but are marked like a capacitor. 2. The two inductors Without a meter how can I...
  19. K

    New to electronics

    ;D Tanks again I have the data althou  I can not find  a l165h part source yet. Any ideas about thermistors and a Icl7107. the gage goes down with a 1k thermistor and a 100ohm ntc thermistor and is supposed to go up instead. by. see ya.
  20. K

    Service Manuals

    http://www.electronics-lab.com/forum/index.php?action=post;board=14.0 Need assistance Findig out where to go fo two items: 1. Owners Manual for a EMCO Power Supply Model:PSV-5 2. Service Manual for Same. 3. Service Manual and schematic needed for A NEC Reserve 2 Model A-7E Amplifier. Where to go...
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