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  1. Mod
    22nd April 2012 - permalink
    Correction: I just couldn't see. Turned on some lights and took some HQ pics of the knobs.
    You can zoom in and see that they say: Taiwan Alpha A10R 9G2
  2. Mod
    22nd April 2012 - permalink
    Hello Les,

    I posted about cleaning the knobs on my Firestudio Mobile and you commented on it a while ago.

    I was hoping you could give me a tip on where I can purchase sealed rotary knobs to use as replacements, and how I would identify the exact type that I need.

    I opened up the unit but they are just blank. I also Google searched "sealed rotary knobs, fire studio rotary knobs replacement" etc and got nothing.

    Contacted technical support and never heard back.

    Thank You Les.

  3. mikepe
    24th January 2012 - permalink
    Hi Les
    Are you familiar with the Akai s3000xl sampler ?
  4. terrytiger
    29th April 2010 - permalink
    Hi Les,I hope you'll not consider me unpolite for direct contact; You're one of the most competent and helpful person out there. I bought a Shure Unidyne 545s pistol grip. First I tested the impedance (I'm not an electronic expert) in both hi and lo-Z config (Amphenol 4 pins plug, I followed the directions on the Shure site). I was surprised to see that the value at hi-Z is only 22 ohm; at lo-Z is ... 22 ohm. I checked a Shure 99S56 SC cartridge and the result is about 1300 ohm. Then I tried to measure the output (tension) while blowing in the mic, and I had the impression that the value before the transformer was higher than the value at the plug.
    Then I plugged the mic in the amp and it works, but it seems to be weak. The 99S56 is much more powerful.
    Is there something wrong? Transformer not working properly (hi-Z = lo-Z)? May be some problem with polarity (the yellow and green cables to the elements seem re-soldered)? any additional tests?
    Thanks in advance. Regards.

About Me

  • About Les
    Tiger, Ga
    research engineer
    I got my engineering degree from the University of Florida.
    Career highlights
    Formerly audio research engineer with Shure Brothers Inc.

    Manager of R&D, ITW Chronomatic

    Research Fellow, ITW Corporate Advanced Technology Center
    Other interests
    I build guitars. I'm a pilot.
    Key gear used
    Heh...my stuff?
    Issac Newton and Jimi Hendrix
    I have 10 guitars and a sitar.
    Studio Name
    I have a project studio, but it doesn't have a name! Must fix that...
    Back Line
    Well, a lot of stuff. Too much, really.
  • Signature
    L M Watts Technology


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  • Last Activity: 1 Day Ago
  • Join Date: 27th February 2008


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