Simulcast & 6-Band (Slider) EQ Builds - Gold Series

[Cybercow]

As this weekend winds down, I've finished two more pedals in what I'm referring to as my "Gold Series". I really like the Tayda Light Gold enclosures and their drill service for this series of pedals in my build queue.

First is the PedalPCB 'Simulcast'. Just the straight-up build with no mods. Got to use one of the genuine Mullard OC71 Ge BJTs I had squirreled away. And BANG! . . . . right out of the gate this thing jumped to life with a pleasant range of tones and dirt control.



The second is the PedalPCB '6-Band EQ' (slider version). This build requires some patience and good measuring skills to get everything to line up correctly. I modified some of the band frequencies to suit my liking.

I altered some of the resistor/capacitor value combinations to alter each band as follows:
Pot #1: 60 Hz (was 100 Hz)
Pot #2; 156 Hz (was 200 Hz)
Pot #3: 272 Hz (was 400 Hz)
Pot #4: 1.86K Hz (was 800 Hz)
Pot #5: 6K Hz (was 1.6K Hz)
Pot #6: 13K Hz (was 3.2K Hz)



For those interested, I've attached a modified build doc showing what components & values to change. This build doc is a blend of both the slider and pot versions of the 6-Band EQ. And you can use the AMZFX (Muzique) Gyrator Calculator to calculate your own band-pass values.



And here's a shot of three out of the 7 total builds in my "Gold Series".



Just 4 more to go . . . a 'Twin Face', 'Binaura', Brian Thornock's 'Daredevil Flanger' and a 'HAARP'.

After this series the plan is to build a 3-way combo with a 'HAARP', 'Dipthonizer' (MadBean 'Honey Dripper') and a Parasit 'Theremin Fuzz' all in a 1590DD enclosure. Still have to decide what order they will be in or if I'll go nutz and add order switching. But all that will come later.

Thanks for looking and Happy Building!

 

[DougieFresh]

Very nice builds! Just wondering where you got those little white tips for the slide pots... I can't seem to find them anywhere. Thanks!

 

[Bricksnbeatles]

Very nice builds! Just wondering where you got those little white tips for the slide pots... I can't seem to find them anywhere. Thanks!

I used these on mine. fit well, and no problems even 2+ years later

White Cap For Toggle Switch Lever

Tayda Electronics - Get It Fast - Same Day Shipping

www.taydaelectronics.com

my build:

Six-Banned EQ (WARNING: Graphic Content 😜)

Not too many build reports of the 6 band graphic EQ project around here. Time to amend that. So, let’s start with an explanation of the design: It’s a graphic EQ, so this should be pretty self explanatory. Facebook has (used to have? Idk, I did this graphic around a year ago, and I don’t use...

forum.pedalpcb.com

 

[DougieFresh]

Fantastic, thanks! They should add those to the build docs... Very hard to see the faders without some kind of tip, especially with the black faceplate.

 

[Feral Feline]

Super sweet builds!

As always.

I needed to revisit Your Theremin Build and check out the gut-shot as it wasn't included here. Again, sweet.
Looking forward to seeing the group-shot of the completed entire GOLD series.

Importantly...
Thank you for sharing your mods. As I read through your build report I thought about asking for them then thought:
"nahh, I need to figure this stuff out on my own, must edjumicate myself."
Was pleased to read further and find the included mods. Merci Beaucoup!

I've been working off and on with a modded GE-7B version of this, bass freqs tweaked to my best-guessed preferences, so it's great to see what you've done and how you've done it.


Will you be changing the faceplate freqs to reflect your mods? If so, do you have a plan on how to go about doing it?

Oh, one more question: Did you work out the Q for each band?

 

[Cybercow]

I've been working off and on with a modded GE-7B version of this, bass freqs tweaked to my best-guessed preferences, so it's great to see what you've done and how you've done it.

Will you be changing the faceplate freqs to reflect your mods? If so, do you have a plan on how to go about doing it?

Oh, one more question: Did you work out the Q for each band?

1) No, I'll not be changing the faceplate. (No means to do so with any real sophistication - other than having a new one made.)

2) Yes, I've worked out the Q for each, as seen in the attached schematic image.) And after looking back at what I've done, I now see that I could've finessed the individual gyrators a bit more for higher Q values and better spread (distribution) of the band frequencies by playing more with the values in the Gyrator Calculator. (I just visually re-mapped the component values from the Gyrator Calculator to the original schematic.)

 

[Feral Feline]

Thank you, kind sir, for the Q and answering my questions.