DIY Effects

[LukeFRC]

11 hours ago, bremen said:

Just found this thread.

 

I posted elsewhere that I've cloned the sansamp bass driver and have a couple of spare boards, anyone want one? £0

That looks cool - which version? And 1590bb?

[bremen]

This one.

 

Yes, 1590bb.

 

It works, haven't compared it to a real one but I've heard the original described along the lines of "adding a bit if ampeg type grit". Does that, works as a preamp when used with a slave, or an effect when used in front of a bass amp.

Edited August 22, 2024 by bremen

[LukeFRC]

1 minute ago, bremen said:

This one.

 

What is 1590bb?

 

It works, haven't compared it to a real one but I've heard the original described along the lines of "adding a bit if ampeg type grit". Does that, works as a preamp when used with a slave, or an effect when used in front of a bass amp.

Enclosure size - 120x94mm

[bremen]

It works upside down, too 😍

[bremen]

13 minutes ago, LukeFRC said:

Enclosure size - 120x94mm

True 👍

[bobbass4k]

17 hours ago, bremen said:

Just found this thread.

 

I posted elsewhere that I've cloned the sansamp bass driver and have a couple of spare boards, anyone want one? £0

It's hard to tell scale, are the smd resistors/caps mostly 0805?

[nilebodgers]

23 hours ago, bremen said:

Just found this thread.

 

I posted elsewhere that I've cloned the sansamp bass driver and have a couple of spare boards, anyone want one? £0

Now that is nice work. 
 

I’ve just designed and made my first SMT board for 22 years. I can’t believe I used to do this stuff without a magnifier. (and a proper lab with expert technicians to do things too fiddly for the design engineers!)
 

[nilebodgers]

23 hours ago, bremen said:

 

 

Edited August 22, 2024 by nilebodgers
Duplicate post

[bremen]

5 hours ago, bobbass4k said:

It's hard to tell scale, are the smd resistors/caps mostly 0805?

Mostly 0805 yes. Some of the caps are 0603 - I looked for what was cheapest available C0G from Mouser.

[itu]

By the way: where's @disssa? Making the ultimate preamp, or has he turned to power amps lately?

[bobbass4k]

On 22/08/2024 at 20:33, bremen said:

Mostly 0805 yes. Some of the caps are 0603 - I looked for what was cheapest available C0G from Mouser.

That's fine, should still be doable by hand - I'm very tempted to give one a try, how did you assemble it without a silkscreen, have you got a BOM with a key to the footprints?

[bremen]

I had the altium schematic and board on screen. I can make assembly drawing pdfs if you want to have a go.

 

 

[bobbass4k]

23 hours ago, bremen said:

I had the altium schematic and board on screen. I can make assembly drawing pdfs if you want to have a go.

 

 

I wouldn't want to put you out, the schematic and PCB layout should be enough, don't have altium but should be able to get them into KiCad - if you don't mind sending me the files I'll happily take a PCB, been a while since I've done a fully SMT board, should be an interesting challenge.

[bremen]

No it's cool, making assembly drawings from the altium files is easy. Pm me your address.

[Passinwind]

Back to EQ pedals lately, as I wrap up my Github open source respository.

 

Very old battery powered NAMM  build repurposed:

 

 

 

 

Another old one brought up to current 4 knob specs:

 

 

 

4 knobs but with fixed frequency HPF embedded:

 

 

And then my first battery powered six knob job, using OPA205 and OPA2205 low current opamps:

 

 

 

 

I've also  been revisiting my older through-hole compact ones, which fit in a smaller 125 enclosure and are a much quicker build since everything is on one board:

 

 

Edited August 28, 2024 by Passinwind

[disssa]

Markbass Little Mark II Preamp:

 

[LukeFRC]

 

took a while to bug fix this... but a Mutron iii (Aion's Lumitron) with a couple of mods... a decay knob and the "Moog filter" mod that does something and makes it sound different

 

[rainbowreality]

On 21/08/2024 at 21:04, bremen said:

Just found this thread.

 

I posted elsewhere that I've cloned the sansamp bass driver and have a couple of spare boards, anyone want one? £0

I'd love one if you have one going spare?

[RonC]

How do you guys print/paint the box so nice??

Edited September 9, 2024 by RonC

[bobbass4k]

What PCB prototyping services have people used recently? I traced the fuzzrocious heliotropic years ago and i couldn't remember how it sounded so I breadboarded it this weekend and it's great. Bit unwieldy for stripboard but I've knocked a PCB together in kiCad. $37 for 3 from oshpark. Will I get cheaper than that? I know years ago oshpark was pretty much the only game in town but I know a few other prototyping services have popped up.

I know Digikey do it but as an employee of Farnell I can't give money to the enemy...

[LukeFRC]

6 hours ago, bobbass4k said:

What PCB prototyping services have people used recently? I traced the fuzzrocious heliotropic years ago and i couldn't remember how it sounded so I breadboarded it this weekend and it's great. Bit unwieldy for stripboard but I've knocked a PCB together in kiCad. $37 for 3 from oshpark. Will I get cheaper than that? I know years ago oshpark was pretty much the only game in town but I know a few other prototyping services have popped up.

I know Digikey do it but as an employee of Farnell I can't give money to the enemy...

I’ve used Elecrow you can use the prototyping service and 10pcb costs about £5 posted - takes ages and you have to get the kicad file right. (Tip standard hole size is not big enough for diy pedals!) 

[nilebodgers]

JLPCB. Very cheap, good quality and delivery is quicker than I’d have expected for the cheap options.

[bremen]

Jlcpcb is so cheap, fast and such good quality that I suspect they're a loss leader for some sinister purpose.

 

So user-friendly too, upload the gerbils (I'll let that one in 😄) and you get a preview so you know you've not forgotten a layer.

[bobbass4k]

3 hours ago, bremen said:

Jlcpcb is so cheap, fast and such good quality that I suspect they're a loss leader for some sinister purpose.

 

So user-friendly too, upload the gerbils (I'll let that one in 😄) and you get a preview so you know you've not forgotten a layer.

Okay yeah £2.68 for 5 PCBs delivered feels like it shouldn't be profitable. I used to be a buyer for a contract manufacturer and that's not far off the wholesale/volume prices we used to pay with negotiated discounts... 

 

Anybody fancy a heliotropic PCB when they arrive? I can post the schematic when I'm home, but it's basically a modified Muff (no clipping on the 2nd gain stage) that goes straight into a preamp/boost with a Muff tonestack.

 

Edit - apologies, £3.60 for Lead Free HASL. Still cheaper than some coffee's i've bought recently...

Edited September 10, 2024 by bobbass4k

[Sibob]

10 hours ago, bobbass4k said:

Okay yeah £2.68 for 5 PCBs delivered feels like it shouldn't be profitable. I used to be a buyer for a contract manufacturer and that's not far off the wholesale/volume prices we used to pay with negotiated discounts... 

 

Anybody fancy a heliotropic PCB when they arrive? I can post the schematic when I'm home, but it's basically a modified Muff (no clipping on the 2nd gain stage) that goes straight into a preamp/boost with a Muff tonestack.

 

Edit - apologies, £3.60 for Lead Free HASL. Still cheaper than some coffee's i've bought recently...

Yup, will have a Heliotropic PCB off you 🙂

 

Cheers

Si