[sdiy] Dry/Wet effect relay that makes 'click' noise on changes... figured out the problem..

[Simon Brouwer]

Good to hear that you solved it!
 
Best regards
Simon

> Op 10 januari 2016 om 22:25 schreef jpdesroc <jpdesroc at oricom.ca>:
>
>
> After tweaking everything around my project
> I finaly found it was a very badly shielded output cable
> that would amplify the switching clicks !!!!
> The shield of that cable was greyed out and it was hard
> to retain any solder on it..
> Using a good shielded cable at the output cured the click/pop problem.
> Now the switch pop's are normal and acceptable.
>
>
> -------- Message original --------
>
> Maybe this could be a better choice:
>
> http://www.digikey.ca/product-detail/en/HE721C1200/HE114-ND/133225 [1]
>
> ?????
>
> --------------------------------------------------------------------------------
>
> -------- Message original --------
>
> OBJET:
> Dry/Wet effect relay that makes 'click' noise on changes...
>
> DATE:
> 2016-01-09 20:17
>
> DE:
> jpdesroc <jpdesroc at oricom.ca>
>
> À:
> Synth-diy at dropmix.xs4all.nl
>
> Hi everybody,
>
> I just finished my DIY Hammond Vibrato/Chorus effect for guitar this
> week
> and am pretty happy with the final effect it gives to my old
> stratocaster.
> 3 vibrato, 3 chorus effects, very impressive !
> BUT I'm facing a last problem on this project..
> It uses a PANASONIC JQ1P-12 SPDT relay (K1) to switch
> the signal from clean to effect, but every time I switch
> the relay to change its state a big 'click' is heard in the audio
> output.
> I used that relay because I had some on hand to be used.
> I checked for any DC voltage on all of its contacts but there are not.
> All the contacts are at zero volt stable.. no DC.
> I noticed at the scope that its contacts are bouncing a lot on all state
> changes
> and that is what makes that noise.
> Maybe its because this type of relay is rated @ 10amp on its contacts.
> A too big coil 'snap' on the contacts ?
> I'm considering to change the type of relay for a quieter one.
> Maybe a small reed relay would do instead..
> Please have a look at the following schematic where the relay is used:
>
> http://www.arcenson.com/public/Hammond_scanner_main_board_schematic.pdf
> [2] [1 [2]]
>
> This is part of the overall project.
> I need your suggestion on a good silent SPDT relay working at 12VDC.
> Thanks.
>
> Links:
> ------
> [1]
> http://www.arcenson.com/public/Hammond_scanner_main_board_schematic.pdf
> [2]
>
>
>
> Links:
> ------
> [1] http://www.digikey.ca/product-detail/en/HE721C1200/HE114-ND/133225
> [2]
> http://www.arcenson.com/public/Hammond_scanner_main_board_schematic.pdf
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