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  1. HANKMARS

    What am I not seeing here?

    Perhaps this is what gosloto is referencing?
  2. HANKMARS

    What am I not seeing here?

    I received the following MPro notification but see no gosloto in EMP discussion. I did the following search from inside MPro. The results are as follows. I am at a loss of understanding on this matter.
  3. HANKMARS

    Modified sinewave to pretty good sinewave?

    The power out seems pretty stable. V/D = 50 V. A non-true RMS meter reads inverter voltage out as 100 VAC. Inverter supply voltage is 12 VDC. Photos: #1. Inverter Vout no load. #2. 6 Amp belt sander start up. #3. Belt sander free running. #4. Belt sander running loaded.
  4. HANKMARS

    Modified sinewave to pretty good sinewave?

    Second attempt
  5. HANKMARS

    Modified sinewave to pretty good sinewave?

    Net connection flaky. Fortunately funky inverter pwr out from other day was faulty power cord. Here is actual waveform. 50 V per division, time base 5 ms per but skewed to get 2 cycles on display.
  6. HANKMARS

    Modified sinewave to pretty good sinewave?

    Glad you asked. The following attachments are 1. Inverter power out. It appears that this inverter has been seriously damaged. Scope setting is 5 V per division. The signal is about half right. The high side shows +10 V. Low side looks like about -7 V. Also 0 V has been dragged down about 5 V...
  7. HANKMARS

    Modified sinewave to pretty good sinewave?

    I do have a kill-a-watt meter. I found that it keeps the landlords a little more honest. I do not have a true RMS meter. I will scope inverter output and include it in an attachment.
  8. HANKMARS

    Modified sinewave to pretty good sinewave?

    Thank you. In the simulation you were considerably more generous with the waveform shoulders than my inverter. The attachment is a very near replication of power out.
  9. HANKMARS

    Modified sinewave to pretty good sinewave?

    Very nicely done simulation. Mind if I ask what program/app/simulator you did this with? Quite honestly, while pondering the notion of producing a sinewave from the choppy waveform, the caps were my first flash of thot. Keep in mind I will be using high voltage, 110 V at let's say 800 W. The...
  10. HANKMARS

    Power jitters

    A vintage VIZ WO 555 15 MHz dual trace. Circa 1960s, 70s? Hey, for 25 dollars I'm satisfied. Even though it doesn't have the time base for gigahertz, it will still give good clues as to; is signal present? Does amplitude waver? Spikes? For any precision work at high freqs, I hold the client...
  11. HANKMARS

    Power jitters

    I have always made the blind assumption that a torrid inductor just prior to output terminals, is fabricated and "tuned" as a filtering device to eliminate feedback from the load. Like I say, an assumption.
  12. HANKMARS

    Power jitters

    When I scope out the output of a motor controller in operation, I often see a "chatter" of the sinewave. Is this due to REMF from windings or maybe reflected energy from a capacitive load trying to corrupt of make a phase shift of the power out? Let's assume my scope is triggered as finely as...
  13. HANKMARS

    Modified sinewave to pretty good sinewave?

    If an acceptable functioning design were to be produced free of charge (that would be my time spent) I suspect the cost/benefit/profit bottleneck will be component cost and manufacturing cost. We can nix the manufacturing cost. In a world where one can purchase a 55 gallon drum of new...
  14. HANKMARS

    Modified sinewave to pretty good sinewave?

    Oh, BTW, when you come across any inverter that has "pure sinewave" printed on it, that is more of a classification of category, not a guarantee of pure-sinewave output. Quality varies greatly dependent upon manufacturer.
  15. HANKMARS

    Modified sinewave to pretty good sinewave?

    Well, gunna try it anyway. Gunna lash up my bogus "modi-sinwav" to a couple power FETs whose gates are driven by the generic high freq triangle wave hetrodyned with a modulated PWM and load it and see what it looks like. Ten bucks worth of parts a a couple hours labor. I'll get back to ya.
  16. HANKMARS

    Modified sinewave to pretty good sinewave?

    Sure. After all, "That's how we've always done it." Thanks for the encouragement. Legend has it, Isaac Newton was a SOB. part-time judge. Kinda of an A-whole from the bench. Stern, ever-serious. The only recollection of him seen laughing comes from a instance when he presented his pimer to...
  17. HANKMARS

    Modified sinewave to pretty good sinewave?

    The short abbreviation for the emission spectrograph is ICP. Maybe that will help. It has been over 20 years since I worked on one so I do sometimes misplace a letter or two. Anyway, I'm am still interested to hear ideas as how to simply and inexpensively convert a high power square wave into a...
  18. HANKMARS

    Modified sinewave to pretty good sinewave?

    If I did not mention it prior, the caps would be in parallel, maybe I said series confusing the subject. In series it would create a phase shift of 120 degrees indeed changing the pf. Better?
  19. HANKMARS

    Modified sinewave to pretty good sinewave?

    That is not close to my problem. Can you put your last reply into some sort of logical terms and references? Are in the correct forum. Nevermind.
  20. HANKMARS

    For Sale: Gaming accessories

    I am Mr Gaming Illiterate but I think I have a couple game boards here. I think the GIGABYTE board is a high speed comm bd for gaming. Also think antenna bd is game accessory. Let's say 125 dollars for GIGABYTE and 15 dollars for antenna bd. If interest you can send your test method for function...
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