Anyone still using a SHO?

Discussion in 'The Stomp Box' started by schenkadere, Aug 9, 2019.

  1. schenkadere

    schenkadere Friend of Leo's

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  2. Skydog1010

    Skydog1010 Tele-Holic Ad Free Member

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    We actually traded ours 1998 model year for a Z3 Focus, the SHO, crazy car with electrics issues. It was full of demons. But it would fly.:eek:
     
  3. schenkadere

    schenkadere Friend of Leo's

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    Should have thought of the Ford and Mad Professor title overlap.
     
  4. ICTRock

    ICTRock Tele-Afflicted

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    still have it, it isn't my primary booster these days but I'd never part with it either.
     
  5. 11 Gauge

    11 Gauge Doctor of Teleocity

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    To add insult to injury, Vex didn't even include protection for the transistor with the earliest ones. Just a little ESD is all it takes to kill a mosFET.

    But beyond low parts count, IMO tweaking some of the handful of parts can make the SHO sound better with the typical rig - I like dropping the input impedance and the input and output caps. You can basically just take how the first SHO stage in the Box of Rock or Distortron are handled, and that's pretty much sufficient (and they have the protection diodes to keep the transistors from frying, too).
     
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  6. artdecade

    artdecade Poster Extraordinaire

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    Not that I am looking to do it, but what you have to do to fry a SHO?
     
  7. 11 Gauge

    11 Gauge Doctor of Teleocity

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    You don't have to intentionally do anything. The SHO uses a mosFET transistor. What's involved in the structure of a mosFET makes it potentially "fragile at the input," trying to put things in layman's terms.

    Stuff like ESD will kill a mosFET, and it was probably the most common reason that Vex had to replace transistors in the non-protected SHOs.

    The good news is that you can retrofit either a pair of basic silicon diodes, or a single 9.1V Zener diode, or even just an LED (which is what the runoffgroove.com Peppermill uses for its mosFET transistor stage), and the mosFET will be sufficiently protected.
     
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  8. BBill64

    BBill64 Tele-Afflicted

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    my bandmate is using my zvex SHO as a splitter/booster at the mo. I built one and gave it to an organ playing friend who's ELKA needed a bit of a boost to hit the Leslie with enough gain. It does what it do and it do it good.
     
  9. OttoCorrect

    OttoCorrect Tele-Meister

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    I had the Chicago Stompworks clone for a bit, I had gotten it for like $35 off reverb. It does brighten up the signal a bit, which can be nice for some I guess but I found the brightness that comes with the impedance thing sounded a bit harsh with my rig at the time. Maybe now, since I have a different amp, I would like it but it didn’t quite jive with me at the time.
     
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