Sound Skulptor forums

Build help and troubleshooting => EQ573 Equaliser => Topic started by: AbYdIy-28 on December 16, 2023, 06:52:48 AM

Title: Part missing and a few broken ones.
Post by: AbYdIy-28 on December 16, 2023, 06:52:48 AM

Hello Jean-Pierre! 

I just got done soldering and putting together my EQ573-II and accidentally soldered the ceramic capacitors C62 and C70 to the wrong spot and had to cut them out destroying them, is there any way you guys could point me in the right direction on where to get the right capacitors so I can finish this build? Also, the capacitor C28 you guys sent me was supposed to be rated at .022 or 22n, but the one I got was rated .22, there was also an extra Resistor Network (9 instead of 8. Thanks again for the quality build I really enjoyed my last one, the AB528, it sounds great! 

Title: Re: Part missing and a few broken ones.
Post by: JPK on December 18, 2023, 05:58:56 PM

The capacitors are C62 and C70 value 47p marking 470.
Mouser / Digikey : FG28C0G2A470JNT06



0.022 you accidentally sent a capacitor valued at 0.22.

Do you mean there was 6 220nF and 3 22nF ?

If you confirm, sorry for this mistake, we will send you the missing 22nF capacitor.

Or for faster delivery, you could get it at Mouser MKS2D022201A00KC00
Let me know.

Title: Re: Part missing and a few broken ones.
Post by: AbYdIy-28 on December 19, 2023, 12:29:52 AM

Thanks for the response and information Jean-Pierre! 

I ordered the capacitors from Mouser using the Digi keys you provided, I'll let you know if everything works. 

Again, thanks for the top-quality builds at affordable prices! 

Title: Re: Part missing and a few broken ones.
Post by: AbYdIy-28 on December 25, 2023, 01:40:50 AM

Hey Jean-Pierre! I got the kit put together and everything is working great except for the high pass filter doesn't work on the 160 Hz position, I'm curious as to where I should start trouble shooting.

Thanks! 

Title: Re: Part missing and a few broken ones.
Post by: JPK on December 26, 2023, 11:34:22 AM

You must check the solder joints on C19 and C20 and on the inductor L1.
Is the audio passing through in the 160Hz position?

Title: Re: Part missing and a few broken ones.
Post by: AbYdIy-28 on December 29, 2023, 03:43:21 AM

I've checked the solder joints on C19 and C20 and the L1 inductor, all look good. I do have signal when the low pass in in the 160 Hz position, it is very quiet though, compared to the other positions. 

Title: Re: Part missing and a few broken ones.
Post by: JPK on December 29, 2023, 05:05:27 PM

Look for a bad soder joint or solder bridge on connectors J6a and J6b
Check continuity between same color dots on the attached picture.

Title: Re: Part missing and a few broken ones.
Post by: AbYdIy-28 on December 30, 2023, 11:46:15 PM

I checked the bridge connectors and I forgot to solder the pin highlighted in green, oops! I soldered it and put everything back together, it works great and sounds fantastic, thanks Jean-Pierre! 
When I get money, I'll be buying more.