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Transistor equivalent

Discussion in 'General Electronics Chat' started by Nikolai Petrenko, Oct 24, 2015.

  1. KeepItSimpleStupid

    KeepItSimpleStupid Well-Known Member Most Helpful Member

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    Right, nothing at all. It's just one of those tests that I did to pronounce the AMP unsick. A benchmark, a specification. Offset is usually left out.
    I just found that you can easily overlook biasing, so the Vbe check was included too. Vbe=0. Oh wow! the amp runs really cool - NOT. The amp has crossover distortion.
     
  2. spec

    spec Well-Known Member Most Helpful Member

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    Keep, what is the weather like in Delaware? One more post after this and I make 1K :joyful::joyful:
     
  3. Nikolai Petrenko

    Nikolai Petrenko Member

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    wow, 1K posts! I am only 207.
     
  4. dave

    Dave New Member

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  5. KeepItSimpleStupid

    KeepItSimpleStupid Well-Known Member Most Helpful Member

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    A major winter storm will continue to affect the region into early Sunday.
    Strengthening low pressure will slide by just to our South and East today and tonight bringing heavy snow, strong winds, and blizzard conditions to much of our area.
    Winter Storm Warning remains in effect until 6 AM EST Sunday.

    • Hazard types: Heavy snow, sleet and very strong winds.
    • Snow accumulations: 12 to 18 inches, with 8 to 12 inches along the coast.
    • Timing: Heavy snow will mix with and then change to sleet and rain for a time on Saturday, especially along the coast. Then change quickly back to snow toward evening. Snow is expected to taper off by early Sunday morning.
    • Winds: northeast 30 to 40 mph with gusts over 60 mph.
    • Temperatures: in the 30s inland and in the low 40s near the coast.
    • Impacts: The combination of sleet and rain on top of the wet snow will make it very difficult to shovel, especially for those with physical ailments. Snow will cling to wires and trees leading to power outages. Roads could be very hazardous in some areas.
    Severe Ice Storm
    Widespread power outages, possibly for an extended time. Many downed trees, and impassable roads expected.
    Half Inch to an Inch

    ... Blizzard Warning remains in effect until 6 am EST Sunday...

    * hazard types... heavy snow... gusty winds and blowing snow
    resulting in times of blizzard conditions.

    * Snow accumulations... 18 to 24 inches... with up to 30 inches
    possible in western Chester County.

    * Timing... snow will continue heavy at times today before
    tapering off tonight and early Sunday morning. The strongest
    winds and greatest potential for blizzard conditions will
    occur through this afternoon.

    * Impacts... the combination of heavy snowfall and strong winds
    will produce whiteout conditions and extremely dangerous
    travel. The snow should become more wet for a time today...
    especially closer to the coast. Shoveling of heavy wet snow
    will be problematic for those with physical ailments. Snow
    will cling to wires and trees which could cause numerous power
    outages. Roads will be impassable due to increasing snowfall
    rates of 1 to 3 inches per hour at times in heavier bands.

    * Winds... north 15 to 25 mph with gusts up to 40 mph.

    * Visibilities... one quarter mile or less at times.

    * Temperatures... in the mid 20s to around 30.

    Precautionary/preparedness actions...

    A Blizzard Warning means severe winter weather conditions are
    expected or occurring. Falling and blowing snow with strong winds
    and poor visibilities are likely. This will lead to whiteout
    conditions... making travel extremely dangerous. Avoid travel if
    at all possible. If you absolutely must travel... have a winter
    survival kit with you. If you get stranded... stay with your
    vehicle.

    Snowfall accumulation forecast maps for the latest event are
    available online at www.Weather.Gov/phi/winter

    29F (-2C), Feels like 17F (-8 C)
    Snow predicted for the next 15 hours changing to rain.

    Yucky!
     
  6. spec

    spec Well-Known Member Most Helpful Member

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    I am a well known member now. Is that the same as an infamous member :rolleyes:
     
  7. spec

    spec Well-Known Member Most Helpful Member

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    You must be a pretty tough bunch in Delaware: Weston Super Mare= sunshine and grazing wildebeests :cool:
     
  8. Gasboss775

    Gasboss775 Member

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    Congratulations sir!!!! :D:D:D
     
    • Thanks Thanks x 1
  9. Nikolai Petrenko

    Nikolai Petrenko Member

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    I am still a stupid member :D
     
    • Funny Funny x 1
  10. audioguru

    audioguru Well-Known Member Most Helpful Member

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    Canada, of course!
    I am way up North in Canada. The weather is nice and there is hardly any snow. It was sunny yesterday and today. The snow storm went to the USA. We will get some rain on Tuesday.

    Douglas Self wrote a few detailed books about audio power amplifiers and how to reduce their distortion. He showed and explained that increasing the bias current on a class-AB output too much increases distortion because then low levels are amplified by both output transistors but higher levels are amplified by only one of the output transistors. Distortion is less when the signal crosses over smoothly from one transistor to the other transistor.
     
  11. spec

    spec Well-Known Member Most Helpful Member

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    Thanks- Is that you Gordon? You look different now
     
  12. spec

    spec Well-Known Member Most Helpful Member

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    Not stupid!
     
  13. spec

    spec Well-Known Member Most Helpful Member

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    Glad to hear that the weather is OK in N Can. It has just come thru on the news that Keep's area is going to be hit pretty bad

    I have his bible on audio amp design. He used to be on DIY Audio site but got pissed by all the flack and called it a day
     
  14. Nikolai Petrenko

    Nikolai Petrenko Member

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    Wow, today in Vietnam only 6°C, $%#@& has shrunken :D. Despite Vietnam is a tropical country, winter in the North of Vietnam sometime very cold. It cause by Tropical monsoon climate, hot and cold are very seperated. Strong wind, can blow my little brother :D. High humidity, almost 99-100%. Accu Weather softwave said realfeel is 4°C. I have lived in Russia (of course), I think -2°C in Volgograd made realfeel like 6°C in Hanoi.
     
  15. audioguru

    audioguru Well-Known Member Most Helpful Member

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    Canada, of course!
    There are cities in the middle of Canada (away from the warmer oceans) where they do not say the temperature, instead they say a small number. That number is the number of seconds for exposed skin to freeze. I was sent there following a trip to warm USA and I did not have winter clothes. Outside I went from store to store to keep from freezing but on my way back to the hotel some of the stores were closed. I ran back (I almost flew) as fast as I could. I think the temperature was -40C to -50C.
     
    • Informative Informative x 1
  16. Gasboss775

    Gasboss775 Member

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    Yes I mistakenly put in my real name as my username when I first joined this forum. I thought that I was stuck with that, but Derstrom8 said he could change it if I wanted. Its now the same user name as diyaudio and a couple of other sites.
     
  17. spec

    spec Well-Known Member Most Helpful Member

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    I thought I had seen your cat elsewhere. I don't want to change my user name but it is good to know that you can if you wish. On most sites it is not possible, but Amazon have just allowed it so I have changed my Amazon username to spec now. I do know someone else who may like to change their ETO user name though.
     
  18. spec

    spec Well-Known Member Most Helpful Member

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    Hell !
     
  19. Mikebits

    Mikebits Well-Known Member

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    Is the exclamation point to denote an inverse function as in opposite of hell?
     
  20. Gasboss775

    Gasboss775 Member

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    No that would be Hell^-1.
     
  21. spec

    spec Well-Known Member Most Helpful Member

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    Factorial :smug:
     

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