Recent content by kbyrne

  1. K

    NEC Rotery Switch

    On the bottom of this switch is a metal strip and a metal button. When the switch is turned to the right the button raises upwards and then lowers. That action changes it from position A to position B. How do I rewire this switch as it is a orirional NEC switch?
  2. K

    NEC Rotery Switch

    Two photos attached but they are not real clear as I discovered I need a new camera. Please view and advise as best you can.  P.S. I discovered a letter in a box on the front of switch. Letter is (A). Kevin
  3. K

    NEC Rotery Switch

    No but I have a digital camera and will upload pictures today.
  4. K

    Need help to identify potentiometers, please

    I saw on E-Bay a lot of pots for guitars electric ect. Punch into top 100k, 10k and view them like I did while looking for 250k Alps
  5. K

    NEC Rotery Switch

    I need some help as this part has no letters, numbers ect on it. This is a NEC amplifier and it is a two position switch except the wire hook up to mother board is a flat cable type that seems to be seperated into three different cables surrounded by black plastic. Can three wires be soldered on...
  6. K

    Potentiometer

    Thank you. No A, M in letters. Dual pot that I have found on E-Bay with 12mm shafts and 6mm shafts. Mine is 6mm shaft size. Must be linear, will order one. Many thanks. Kevin ;D
  7. K

    Potentiometer

    I have a NEC amplifier that I am working on and need to find a source of Data Sheet for ALPS potentiometers to identify the value and old part numbers. This is all there is on the pot. 305F & 250KMN. The reading I get is 195k but that is due to fact that the shaft is busted an cannot be...
  8. K

    building Hi-fi speakers

    Buy the book I have called Speaker building 101. Two companys in this country I know off specalize in speakers. Parts Express, MCM Electronics. One of those two companys should still have book and speakers for your project. Google or Yahoo for site address and catalogs, Phone Numbers ect.
  9. K

    PCB design

    Google for your answer or use search engine Yahoo. It is done in programs like Express SCH Capture and Express PCB then produced at home or sent to board houses. Download Eagle freeware version as it has Tutorials also.
  10. K

    Power Supply Question

    Will do. I have the SCH done in Express SCH and am working on PCB now in Express PCB. I also use Xcheck, too check DRC, & Netlists & BOM. In the future I will post results as parts are easy to find. One more problem I saw under closer examination of inconsistent SCH and PCB. Below IC1...
  11. K

    Power Supply Question

    :) Thank you I have the inductor info in my files. I like to try to build this type of project so I will give it a go and use my +15 gnd. -15 I already know all about for tone control circuits. Thank you for all responses. Best Kevin
  12. K

    Power Supply Question

    Actually the address at the top of the page leads to a page that directs you to this project. Is this power supply workable with the change made to diodes Text of PCB board no matter what I use it for? A larger amount other than 15v O 15v. What is the reason behind inductors L1 and L2 and where...
  13. K

    Power Supply Question

    On the schematic D1 & D2 are at the 15v top together but on my PCB board pdf D1 & D3 are together or am I wrong. On the schematic D3 & D4 are at the opposite 15v side of transformer but on my PDF D2 & D4 are together. What I assumed was the text of the PCB was done wrong. On PCB...
  14. K

    Power Supply Question

    I down loaded interesting new power supply for pre amps, tone control purposes. Upon examining the schematic and board there is a difference in diode numbers. Could some one take a look at it and advise me if this power supply is a working design or not as I am new but know how to set up the...
  15. K

    idealCircuit: simple analog simulator

    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.
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