transformer q.

Discussion in 'General Electronics Chat' started by ariemeir, Apr 3, 2013.

  1. ariemeir

    Thread Starter Member

    Jun 24, 2011
    68
    1
    Hi guys,

    I have a few general questions about transformers:

    1. if i want to feed an audio frequency signal into my transformer
    (say 100hz-20khz), do i have to look for "audio frequency" specifications
    when i look for the transformer, in other words - would a regular 50hz transformer work for this ?

    2. When the transformer is specified - what is the real meaning of the output
    voltage, for example this unit here:

    http://www.amazing1.com/products/Mi...quency-Transformer-4kv-15ma-20k%2d100kHz.html

    It mentions the number 4kv, and briefly mentions 12v ac input, but what
    would happen if i drive it from an audio amplifier at 3v - will i get 1kv at the input ? is there a lower limit to this ?

    I am basically trying to build a variable ac signal generator capable of large
    voltages, hence the questions.

    Kind regards,
    Lenny
     
  2. Dodgydave

    Distinguished Member

    Jun 22, 2012
    4,977
    744
    transformers are tuned to their usable frequency of operation so you need no use the right design or your output wont work.
     
  3. #12

    Expert

    Nov 30, 2010
    16,261
    6,770
    That transformer doesn't even start until 20KHz. If you try to go slower than that, the core saturates. 60 watts is close to the range you need (from your other post) but you have to be in the right frequency range to get this one to operate within specs. You're out of range.

    Try looking up Hammond transformers.
     
  4. ariemeir

    Thread Starter Member

    Jun 24, 2011
    68
    1
    Dodgydave , thanks !

    #12, thanks a lot, for your other post too. Appreciate the help.

    Lenny
     
  5. crutschow

    Expert

    Mar 14, 2008
    13,000
    3,229
    How high an output voltage do you want?
     
  6. #12

    Expert

    Nov 30, 2010
    16,261
    6,770
    707 rms @ .1 a
     
  7. umphrey

    Member

    Dec 1, 2012
    39
    1
    Just wondering why choose a transformer instead of an amplifier for an audio signal?
     
  8. #12

    Expert

    Nov 30, 2010
    16,261
    6,770
    It's hard to build an amplifier that goes 2000 volts, peak to peak.
     
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