CA-250 EQ // 3 band Sontec in 500 series format

[evil grill]

Payment sent for 4 kits.
Looking forward to this project.

 

[elskardio]

Thanks to everyone who placed an order. Your kits will ship by the end of the month.

You'll receive a private message with the tracking number of your package and the download link for the build guide.

 

[evil grill]

Thanks to everyone who placed an order. Your kits will ship by the end of the month.

You'll receive a private message with the tracking number of your package and the download link for the build guide.

Hi!

I have'nt recieved a tracking number. Is there a delay?

 

[elskardio]

Hi!

I have'nt recieved a tracking number. Is there a delay?

Yes sorry about that... I just picked up my front panel shipment 2 days ago. It took an extra 10 days to reach Montreal  :-\

I will pack and ship the kits this week 

 

[Fuzz Face]

Thanks for everything Gabriel, I am super excited for these!

 

[Bobby Baird]

Same appreciate you offering the kits.

 

[Bobby Baird]

I have built my pair, but at the unity gain calibration step. I have the trimmer maxed out, and I'm still 7db short on gain on both units. I checked all resistor values before populating. Any suggestions? Thanks in advance.

 

[elskardio]

I have built my pair, but at the unity gain calibration step. I have the trimmer maxed out, and I'm still 7db short on gain on both units. I checked all resistor values before populating. Any suggestions? Thanks in advance.

Hi Bobby,
What’s your test setup? DAW with an audio interface? Are you feeding a balanced signal to the module’s input?

 

[Bobby Baird]

Hi Bobby,
What’s your test setup? DAW with an audio interface? Are you feeding a balanced signal to the module’s input?

Cubase 10, steinberg mr816x, balanced cables into Radial workhorse

 

[Bobby Baird]

Weird changed inputs and outputs on interface. Unity gain works now.  :

 

[Bobby Baird]

Racked calibrated. Thank you!

 

[elskardio]

Racked calibrated. Thank you!

Enjoy 

 

[Bobby Baird]

So... one of the CA-250's high band is not functioning correct. While injecting pink noise using span spectroanalyzer set to 1 octave smoothing to visualize curves. I have the high band shape set to sharp. Frequancy knob set all the way ccw. Gain 12, and the lowest it will go is like 7.68k on span where the knob says 2khz ccw. My other CA-250 works flawlessly. I built both at the same time using the same bom supplied last week. I made sure to take my time. As, I have no schematic. I'm not sure were to start troubleshooting this part of the circuit. Hope to fix this bug. I did bump c28 with solder iron by accident, but it seems cosmetic, and I'm sure that's part of the low band.

 

[elskardio]

So... one of the CA-250's high band is not functioning correct. While injecting pink noise using span spectroanalyzer set to 1 octave smoothing to visualize curves. I have the high band shape set to sharp. Frequancy knob set all the way ccw. Gain 12, and the lowest it will go is like 7.68k on span where the knob says 2khz ccw. My other CA-250 works flawlessly. I built both at the same time using the same bom supplied last week. I made sure to take my time. As, I have no schematic. I'm not sure were to start troubleshooting this part of the circuit. Hope to fix this bug. I did bump c28 with solder iron by accident, but it seems cosmetic, and I'm sure that's part of the low band.

Hi Robert, please check your personal emails. Thanks

 

[critterkllr]

I just built a pair of these EQ’s and they are fantastic! The quality of everything is really good.  The way you fit all of the pots in this EQ was really clever. I’m really grateful that you decided to sell them for us to DIY.

The sound is top notch. Any boosts or cuts sound really natural. No weird phasey issues boosting high. It sounds like that’s the way I tracked it.

The only feedback that I have would be to specify that the standoffs are two different sizes. Like a dummy, I didn’t realize until I was over halfway through soldering the main connector. I used a short standoff on on the switch. Oops! Everything else was really professional and thorough. This was a nice easy project!

 

[evil grill]

Mine are still somewhere between Canada and Sweden.  Really annoying as I was planning to use them on a recording end of May. 

 

[elskardio]

The only feedback that I have would be to specify that the standoffs are two different sizes.

This is clearly specified in the build guide.

Mine are still somewhere between Canada and Sweden.  Really annoying as I was planning to use them on a recording end of May. 

Unfortunately I don't have any control over the postal service...

 

[critterkllr]

This is clearly specified in the build guide.

Okay, dude. Just trying to help. My feedback is to add a note:

“28. Solder the 6-pin header and install the 11mm standoff. *verify you are not using a 9mm standoff*”

 

[Fuzz Face]

I went with some aluminum knobs, whaddaya think?

 

[evil grill]

Anyone tried tle2071 instead of TL071?