Cant fix a WPC tweeter...
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Azatotht
June 3, 2006, 3:38pm Report to Moderator

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Well this is weird, my ST:TNG tweeter was blown, so i changed it.

Changed the speaker, the cap, resoldered wires from the mid speaker, tested continuity, the other speaker hooked to same wires works fine (the mid speaker), any idea ?

Can the high frequencies be filtered from the sound board somehow ?


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Mrhide
June 3, 2006, 3:43pm Report to Moderator

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if you test it without the cap ... do you get something ?


Mrhide.pinnesota.org

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Azatotht
June 3, 2006, 3:48pm Report to Moderator

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Will try that tonight Phil, good call.

With old and new caps, i get fuckall Not even cracking or iss...


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Azatotht
June 3, 2006, 8:14pm Report to Moderator

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Well i get fuckall by hooking either of the tweeters i got directly...

Tried with Alligator clips as well from the mid speaker... i guess i have 2 toasted tweeters  


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pinball wizard
June 3, 2006, 9:40pm Report to Moderator

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well that would suprize me pretty much
but why dont you try with a other machine speaker panel just for fun

crimme tu as plus que une machine......je metteeais ma main au feu que le tweet est bon
mike


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Azatotht
June 3, 2006, 9:47pm Report to Moderator

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Je sais pas pourquoi ca marche pas.. y'a pas l'air défoncé en tout cas (le premier l'est).

Mes 2 autres machines utilisent pas le même genre de tweeter je pense (system 11 et DE).

J'aurais dû prendre toute le panel finalement

Je vais regarder dans les autres games pour voir si les tweeter sont interchangeables..


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pinball wizard
June 4, 2006, 9:27am Report to Moderator

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hehe
ouin ben amene le ici crimme c est pas ca qui manque les machines pour tester
mike


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Azatotht
June 4, 2006, 10:21am Report to Moderator

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Je te lâche un call quand j'aurai le temps...

Sinon je vais juste en commander un neuf. Mais c'est un fait qu'on pourrait l'essayer dans une de tes machines !  

thx.


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sylvain
June 4, 2006, 11:20am Report to Moderator

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You also could take a DVM multimeter and measure the continuity / ohms
across the tweeter directly on its two connectors (e.g. bypass the cap),
once disconnected from the machine. You should read a certain resistance value.
If you read open, then the tweeter is burned. (True for most types of tweeters).

Given it is only a tweeter, you also can plug it with its capacitor, in parallel to
one side of a stereo sound system speaker in your house, at low volume setting,
and see if you hear any high frequencies from it; if not, the cap and/or the tweeter
is/are bad.

The following are reasons why a tweeter can burn:
- too high power too long for the unit; internal small coil overheats and quits;
- broken lead wire from lug to inside the unit;
- presence of low frequencies (e.g. capacitor in-series 'leaking', or too large cap
   value)
- presence of high-frequency noise from the amp, possibly not hearable (higher
   than 20KHz)
- DC voltage/current across the tweeter (bad cap and bad amp).

Bonne chance!
- L'autre Sylvain


Looking for 1966 Bally Capersville, 1967 Bally The Wiggler, 1981 Stern Viper, 1986 Pinstar Gamatron,
1986 Williams Grand Lizard, 1991 Williams Bride of Pinbot, and a few others.
Cash or some trades available. Could also repair a machine of yours +/-$ if needed, in exchange for
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