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  1. Old Comment
    abraxalito's Avatar

    My latest infatuation - transformers

    I am really curious now how far I can push that trafo ratio. Chipamps tend to max out below 100V - LM4766 (74V) is a bit below the LM3886 (94V) but its a dual so more convenient to use. I reckon I can run that in bridged with a 3:1 step down ratio. So then each chipamp side sees 18R (for a 4R drive unit).

    Beyond that caps go on getting better - in terms of energy stored per unit volume. I found photoflash capacitors have about the best Joules/cc ratio available. Not as good as EDLCs but those are too low voltage to be useful except in large paralleled arrays in high power amps. LME49810 goes up to 200V operation but beyond that it will have to be discrete....
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    Posted Today at 12:20 PM by abraxalito abraxalito is offline
  2. Old Comment
    fas42's Avatar

    My latest infatuation - transformers

    Good work there, ... . One gets blasť at times, thinking one's got the SQ in pretty good shape - I'm as guilty as anyone of doing this - and then something is done that pops the level so much further forward, yet again!

    The key is knowing, really knowing, that no matter what barrier seems to be in front of one, in terms of "fixing" the sound - that it can always be bypassed, in some fashion ...
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    Posted Today at 09:31 AM by fas42 fas42 is offline
  3. Old Comment
    abraxalito's Avatar

    Taobao has a TDA1387 DAC (apparently)

    Well spotted! So then it'll need a minor bit of modding to function as a DAC. OK
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    Posted 23rd October 2014 at 06:00 AM by abraxalito abraxalito is offline
  4. Old Comment
    miklos's Avatar

    Taobao has a TDA1387 DAC (apparently)

    The label over the rca sockets says in.
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    Posted 23rd October 2014 at 04:27 AM by miklos miklos is offline
  5. Old Comment
    rjm's Avatar

    Voltage Regulators for Line Level Audio. Part VII : The k-multiplier

    Good point, it seems R1=220 ohms is a better value.
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    Posted 3rd October 2014 at 12:17 PM by rjm rjm is offline
  6. Old Comment
    abraxalito's Avatar

    New active speaker on order from Taobao

    Well that's bad news for learning, big mistakes spawn major lessons
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    Posted 30th September 2014 at 12:43 AM by abraxalito abraxalito is offline
  7. Old Comment
    fas42's Avatar

    New active speaker on order from Taobao

    Seems as if you can't put a foot wrong at the moment, Richard ...
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    Posted 29th September 2014 at 11:27 PM by fas42 fas42 is offline
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