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Stryker sr94hpc

Discussion in 'Amateur Radio Modifications' started by dxing440, Jan 19, 2017.

  1. Iceburgh

    Iceburgh Member

    Mar 10, 2018
    Likes Received:
    I connected the stryker sr94hpc to my diy 450watt dummy load (with built in rf reading components) which is more accurate than a bird meter, and read the dead key and peak for this radio.

    4watt setting = dead key 4watts, swing to 20
    10watt setting = dead key 10 watts, swing to 48 watts.

    Transient peaks of 72 watts.
    To eliminate distortion simply by turning down power mic.

    This mod makes the max mod operate like childs play.
    Shadetree Mechanic likes this.

  2. Bow

    Bow Bastard Modulation Engineering

    Aug 13, 2008
    Likes Received:
    But what does it look like on an O'Scope?

    I'm betting something like this...

    LeapFrog likes this.
  3. Shockwave

    Shockwave Sr. Member

    Sep 19, 2009
    Likes Received:
    Because the mod only increases the range of the AMC without disabling it, the radio can easily be set for clean audio and still be noticeably louder than stock. If you do over modulate it, the rig usually hits RF cutoff long before it flat tops at the 10 watt carrier level. If you're using the mic gain to reduce this distortion, chances are the AMC is now set too high. Ideally the AMC should be preventing this distortion and you can keep a little extra mic gain for added compression and talk power. That assumes the background noise is not objectionable. Last bit of advice is do not set the carrier for more than 10 watts. If you're long winded, 8 watts may be better. While the electronics have the headroom to reproduce strong positive peaks, the heatsink does not! It gets hot even stock because of that carrier and small heatsink.
    LeapFrog, Bow and Shadetree Mechanic like this.

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