Tivdio V-115: Simple modification to abate internally-generated noise

Many thanks to SWLing Post contributor, Marc Thomas, who shares a link to this site which describes modifications to eliminate the Tivdio V-115’s internal noise.

In a nutshell, the author made two small mods:

  • Decouple the power/battery with an electrolytic capacitor of around 10uF soldered to the battery connector inside the radio (see photo above)
  • The author also grounded the speaker, but didn’t test to see if this alone had any positive impact

I could not find contact details for the author of this mod, so I hope they don’t mind the fact I shared it here on the SWLing Post.

Note that the Tivdio V-115 is also known as the Audiomax SRW-710S and Kaimeda SRW-710S (and likely rebadged as a number of other models).

Click here to read reviews of this radio.

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1 thought on “Tivdio V-115: Simple modification to abate internally-generated noise

  1. Mike S

    Thanks for the pointer.

    As one who is particularly annoyed by radio-generated hash leaking into the audio, I have returned, resold, or simply shelved more receivers over the years than I can keep track of. I have occasionally made half-hearted efforts at adding grounding and/or internal shielding to radios otherwise headed for the trash heap, but with middling to limited success.

    The strategy posted by this user is puzzling to me. The “common knowledge” is that this digital hash most commonly originates in the controller for the LCD display panel. When meticulous component placement or shielding don’t work in receiver design, designers sometimes take a “cop out”. For instance, the CCrane pocket radio dedicates a front panel button to turning the display off as its solution to digi-noise.

    So it is quite surprising to see that someone claims to have solved the noise issue in this particular set of models by strapping an electrolytic across the battery terminals. With the above background in mind, the electrical rationale behind it simply does not make sense. Does it really work? To what extent?

    Reply

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