Recent content by wattsabundant

  1. wattsabundant

    DChristie's PL 2000

    The only problem I had with my 2000 was the volume control didn't go to zero. Sound could be easily heard on any source that was operating. Didn't even try to find a new pot. Gave it to my brother with a 400.
  2. wattsabundant

    PL700 Series II Lessons Learned

    ...and if the gator clips make contact to the chassis while still on the output screws there will be a substantial arc flash. If you got across 200 VDC you're lucky to be alive.
  3. wattsabundant

    DChristie's PL 2000

    Look for cracked solder joints on I/O jacks. Low gain at all frequencies? Tone in/out? Coupling caps caps C21, C22, C47-50, C42,43
  4. wattsabundant

    Carver C-500 vs Phase Linear 400 Series II

    If the 400 relay board is going to get installed on one of these amps I would like to know what the +DC voltage is a 120VAC input. There is a possibility that a value change could be in order to protect the chip from overvoltage.
  5. wattsabundant

    Fluke 289 v 87V

    My first Fluke was a 75 in the early 80's when I was dirt poor. It served it's purpose. Then the 87 came out. It became the standard at my day job. We've bought more than a 500 over the years. Some of the advanced features of the 289 are good for industry. Given the price, I can't see any...
  6. wattsabundant

    First PL700 Check Out

    The random order of the data taken, and lack of consistency makes it very difficult to make any determinations. At this point I don't even recall what the issue is.
  7. wattsabundant

    First PL700 Check Out

    Were all of the readings made with the meter on diode range or resistance?
  8. wattsabundant

    VIZ SINE/SQUARE WAVE AUDIO GENERATOR #WA-504B/44D

    There's nothing wrong with using a cheap function generator for checkout. Sine wave distortion will likely be 1% or more. If you have a scope play with the square wave genrator and watch what happens at the frequency extremes.
  9. wattsabundant

    VIZ SINE/SQUARE WAVE AUDIO GENERATOR #WA-504B/44D

    mine was ...function generator.
  10. wattsabundant

    VIZ SINE/SQUARE WAVE AUDIO GENERATOR #WA-504B/44D

    I got caught in a pinch and needed some kind of a sine wave generator to see if an amp would pass a signal. I found it on itunes for free. I like the Waveteks but own all HP. Bought them all at Dayton hamventions 20-30 years ago. I got to work on the 204C oscillator last year when it had a...
  11. wattsabundant

    Phase Linear 200 rebuild

    This amp being designed with budget in mind only has 2 transistors in the front end vs 4 for 400/700. They saved the cost of a transistor and used diodes for the bias circuit which was a bad move. The schematic is hard to read as apparently there was a paper shortage so everything was crammed...
  12. wattsabundant

    Phase Linear 200 rebuild

    Here's the manual. Read the section on stability and thermal run away and the service bulletin. Ask yourself if it's worth it.
  13. wattsabundant

    Oscilloscopes - Questions, Comments and WTF?

    Hard to beat that price. There are some cracks for some of these scopes that xtend the badwidth etc. The downside of them is the trace is a joke compared to a decent analog scope. In that I mean the trace is so fat you miss high frequency oscillations riding on the waveform. I have a 50 year...
  14. wattsabundant

    First PL700 Check Out

    Although I can't confirm this story, I seem to recall Cerwin Vega used to claim their sub could be plugged into the wall. Assuming an 8 ohm load and 120 volts at the outlet that would calculate to 1800 watts and 15 amps which would not blow a breaker.
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