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  1. Delta Prime

    What are specs on this cap?

    It's 1 microfarad capacitor the J stands for tolerance and happens to be equal to plus or minus 5%
  2. Delta Prime

    Silent Switch for MIDI Surface Controller

    It was my assessment I bought those switches they are silent and I have used many in my designs. You are looking for advice I was only trying to help. Good luck to you.
  3. Delta Prime

    Silent Switch for MIDI Surface Controller

    Soft typing, silent, no noise smaller footprint 6x6 mm by 5 mm Hight. Use only as reference please... https://www.amazon.com/Momentary-Tactile-Precision-Mechanism-Printing/dp/B08F59V6VG
  4. Delta Prime

    1954 HMV radiogram record player change.

    What model Birmingham Sound Reproducers (BSR) did you rip the guts out of? these are a few 1970,71. Record player turntables. 260 McDonald change sheet (use C129 service manual)2Turntable 400 McDonald installation & service instructionsTurntable 500 McDonald installation & service...
  5. Delta Prime

    help with IR2110 chips

    Single-phase transformers kVA = (load voltage x load current)/(1000 x load power factor) https://eepower.com/technical-articles/how-to-design-a-transformer-size-and-selection/ [Mod edit: corrected wrongly inserted link]
  6. Delta Prime

    How to troubleshoot single dim bulb/socket on Delco radio pcb?

    Is your vehicle a 2004 GMC Yukon Denali? And is that a Bose radio inside of it? Any information printed on the radio itself? I would like to try to find a schematic for it. :)
  7. Delta Prime

    help with IR2110 chips

    Apologies mosfets not igbt. No quiz. I was Just kidding. You doing a great job you're almost there.
  8. Delta Prime

    help with IR2110 chips

    Dead times are necessary to mitigate any risk of current shoot through between the switching power FETs. Integrated FET drivers often have a feedback based self timed FET switching sequence to ensure the smallest possible dead times while avoiding any shoot through current. Which brings up...
  9. Delta Prime

    Silent Switch for MIDI Surface Controller

    Welcome to maker pro! Clarification is needed. 1) Are you switching a matrix in your MIDI surface controller? 2) Is this a high side switch low side switch? 3) Why is there a capacitor on your tactile momentary switch? 4) Can you show me Your design? I'll be back... I got to go watch the...
  10. Delta Prime

    DIY chalk stirrer

    Google translate from German to English. I have a few parts lying around and want to make a lime stirrer. I have everything figured out except the stirrer motor. Can I do this with this motor? https://www.oyostepper.de/goods-122...-mit-211-1- Rectangular-Stirnradtrieb.html Does anyone know...
  11. Delta Prime

    And now something weird

    These are thought to be like proton-wide wrinkles that emerged in the early Universe as space-time stretched, then froze into place. We've not found much physical evidence of cosmic strings, but the theoretical evidence is pretty promising...
  12. Delta Prime

    Help with What To Replace Next on Small Board

    MOC3012 has an output capable of 250 volts peak whereas moc 3012 M is ON Semiconductors XM series class; which is capable of outputting 400 volts peak, so you're okay
  13. Delta Prime

    How to power 2 motors that rotate in different directions with 1 power source, without tangling cables.

    https://sibley.com/products/?keyword=rotating%20electrical%20connection&gclid=CjwKCAiA75itBhA6EiwAkho9eyJo5eTHo9TVD5WER2Fi1U_KejfGEI7xq75fngqAwcBcls4w9O6SzxoCTJEQAvD_BwE
  14. Delta Prime

    Vacuum Tubes (Valves)

    I'm still looking. But this is rather nostalgic! Documentation : in 1976 the Electronic Engineering Group EEG ,called 1842 assembled reporting directly to the Commander United States Air Force Communication Service. The electronic Engineering group created a EMP handbook. It is official...
  15. Delta Prime

    Help with What To Replace Next on Small Board

    MOC3012 that is a random-phase triac optoisolator . https://www.digikey.com/en/products/detail/rochester-electronics-llc/MOC3012/12117160 :) datasheet for MOC 3010-3012.
  16. Delta Prime

    ID a motorola diode

    https://www.diodes.com/design/tools/manufacturer-part-number-cross-reference/
  17. Delta Prime

    Tektronix 2235 issue

    I know exactly what that is. An honest mistake on your part. All my mistakes are dishonest. :)
  18. Delta Prime

    Front panel fabrication - low cost shops

    Sometimes PCB Fab shops also make PCB enclosures. May I ask? Do you have a 3D CAD file? I've used these guys once 5 years ago I'm with you on the semi-pro stuff I believe in form fit and function is always a priority. Enjoy the rest of the evening sir...
  19. Delta Prime

    Tektronix 2235 issue

    The "Amp Cal" is typically a square wave so you can tweak the capacitance trimmer on your probes to make the square waves trailing edge as straight up and down vertically as possible. Then your scope and probes are calibrated properly. If you can't get the probe to display that square wave on...
  20. Delta Prime

    Vacuum Tubes (Valves)

    Me too... I still work on military satellites. Care for a friendly wager?
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