Common ground

Jockos
Jockos Posts: 310
edited October 2006 in Electronics
Quick question; is the Adcom GFA-5500 common ground?

Thanks,

Jockos
Post edited by Jockos on
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  • Ricardo
    Ricardo Posts: 10,636
    edited October 2006
    I wouldn't know...the GFA-555 is, but that don't necessarily mean anything; grab a multimeter and measure resistance between the two negative posts; that should tell you. If result is 0 ohm, then you have common ground.
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  • george daniel
    george daniel Posts: 12,096
    edited October 2006
    Jockos wrote:
    Quick question; is the Adcom GFA-5500 common ground?

    Thanks,

    Jockos


    I believe that it is not a common ground amplifier
    JC approves....he told me so. (F-1 nut)
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  • Jockos
    Jockos Posts: 310
    edited October 2006
    HT Trookie,

    When you measure the amp should the power be on or off. And whats a good scale to put it on. I have a little cheapie analog meter from radio shack.

    Thanks
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  • disneyjoe7
    disneyjoe7 Posts: 11,435
    edited October 2006
    I don't think it make a difference, but I would do it with the power off. If an amp is a common ground then it will be around 0 ohm.

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  • Ricardo
    Ricardo Posts: 10,636
    edited October 2006
    What Steve...Joe said; Start with the higher scale if you have more than one option (common sense...); If measure is zero, it won't matter.
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  • Jockos
    Jockos Posts: 310
    edited October 2006
    Thanks
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  • heiney9
    heiney9 Posts: 25,217
    edited October 2006
    NO it is NOT common ground. It has secondary windings. Check with ADCOM to be sure but I'm pretty positive the negative terminals can be tied together to be used with SDA's that need a common ground amp.

    FYI, if you run SDA's that require a common ground and the amp isn't common ground you will eventually fry the amp and possibly the speaks.

    H9
    "Appreciation of audio is a completely subjective human experience. Measurements can provide a measure of insight, but are no substitute for human judgment. Why are we looking to reduce a subjective experience to objective criteria anyway? The subtleties of music and audio reproduction are for those who appreciate it. Differentiation by numbers is for those who do not".--Nelson Pass Pass Labs XA25 | EE Avant Pre | EE Mini Max Supreme DAC | MIT Shotgun S1 | Pangea AC14SE MKII | Legend L600 | BlueSound Node 3 - Tubes add soul!
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