***de 9 Mexico 2 Ocean David Yesterday***
"Work active at 10m, 20m, 30m, 40m, 80m & also 2m band..all band worked at FM, SSB & PSK31 also CW modes..hpe can see u down the log & highly appreciated to work with me at the band"
"I'm worked seriously at 10m, 20m & 40m on my HF mobile station right now, please do not hesitate to answer if u hear my call, i'm always calling CQ DX during mobile"

Tuesday, March 15, 2011

SP-21 - Mod

Original SP-21 speaker

View of backside - no hole

View inside - simple

Speaker - 8Ohm, 2w

Done 8nos. of hole

Done!! now acting like expensive speaker

Done some modification for this kind of standard Icom SP-21 speaker which is bought a several days ago..This mod very easy to do..hi hi..Steps as follow :

1) Remove 14 nos. of screws
2) Slowly open a cover, factory use gum for speaker cover
3) Remove 5 nos. of screw at cover speaker
4) Slowly remove a sponge - inside cover
5) Use 1/4mm drill to make hole - mine make 8 nos. of hole
6) Reinstall all cover as per normal

Frankly to say, now the speaker acting like expensive speaker & no more audio like 'Tong Kosong'..hi hi..Now the audio come out more pleasant & nice to hear..Good luck & all the best..

73/88 de 9M2ODY

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2 comments:

  1. Jacques ZS1WCJanuary 22, 2012 at 12:40 AM

    Hi 9M20DY.Just did the mod on the sp 21,a brand new speaker.Original it sounds grappy.I have drilled 10 x 10 mm holes.Use inprovement and sound generating now equvelent to my older sp 23.Thanks for sharing this.
    73
    ZS1WC Jacques Vermeulen
    South Africa

    ReplyDelete
  2. UnknownMarch 13, 2012 at 7:32 AM

    I have done the Mode sounds fine but you did not mention if you put the padding back in please let me know.
    73's Charlie 9H4CM

    ReplyDelete

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