JHS/EHX Lizard Queen

andare · Post by **andare** » 25 Apr 2023, 08:18

Daniel Danger decided to tweet about his original FZ1 and described its origins and clearly credited Snoddy and Hobbs as its designers. When I asked him to also credit Hemmo and Tim, I also got the same spiel about nobody owning how to turn on a transistor and creating the octave. I pressed further, asking him why then credit some designers and not others and why the Lizard Queen is marketed as an original circuit and he ignored me. Of course.

So crediting circuit designers (BTW did the FZ1 also exist in those fabled 60s EE textbooks?) is ok if it allows you to show off your prized possession and knowledge of fuzz lore but telling people that the Lizard Queen is Josh's original adaptation of existing circuits by Tim and Hemmo, which would've been perfectly acceptable, is not.

Anyway I think I've given this circuit way too much attention, especially considering I don't particularly like it as the octave seems too weak.
Mission accomplished for JHS and EHX!

DavidRavenMoon · Post by **DavidRavenMoon** » 04 May 2023, 02:57

LaceSensor wrote: ↑21 Apr 2023, 15:23 I got the same reponse when I queried this

"Daniel Danger 2 hours ago
Because both of those are rudimentary fundamental building block circuits that existed in 1960s EE textbooks decades before someone put them on the internet in the 90s. Hemmo did not invent using 5 components to turn on a transistor, that's just how you do that, etc. If I put a recipe for a grilled cheese sandwich online that doesn't mean you have to credit me every time you make lunch. "

Except Josh and Danial didn't get them from 1960s EE textbooks. That's too much work! lol They got them from home-wrecker or Tim Escobedo's Circuit Snippets.

thepedalarchitect · Post by **thepedalarchitect** » 04 May 2023, 15:32

Does anybody has a layout of the big box PCB for etching?
Would like to mske my own big box with some carbonresistors and greeny caps.

Manfred · Post by **Manfred** » 05 May 2023, 01:47

thepedalarchitect wrote: ↑04 May 2023, 15:32 Does anybody has a layout of the big box PCB for etching?
Would like to mske my own big box with some carbonresistors and greeny caps.

Is in progress but without solder side art.

thepedalarchitect · Post by **thepedalarchitect** » 06 May 2023, 08:13

Perfect

Manfred · Post by **Manfred** » 07 May 2023, 05:22

Here is the preview for the large layout which was derived from the original layout.
When tracing, I found the following differences in the schematic.
Is the value of C8 with 47pF at this point ok?
According to this I have to change the small layout in the post above then.

Lani · Post by **Lani** » 07 May 2023, 06:29

bugg wrote: ↑20 Apr 2023, 18:26 Big Box:

Q1 - 2N2219
Q2 - 2N5088
Q3 - PN2222A
Q4 - MPSA92

C8 (in schematic above) is omitted
Feedback cap on Q2 is 47pF.

I think your good

Manfred · Post by **Manfred** » 07 May 2023, 06:34

I I just saw that nhalda's circuit structur on the first page of the topic is correct.

Manfred · Post by **Manfred** » 07 May 2023, 11:22

Here is the large layout with the designators from nhalda's schematic.
The values for C7 and C8 are my guess.

Ready-to-print PDF-FIles:

Lizard Queen Large PCB Component Side.pdf: (20.56 KiB) Downloaded 31 times

Lizard Queen Large PCB Solder Side.pdf: (4.65 KiB) Downloaded 38 times

SprintLayout6.0 file:

Lizard Queen Large.zip: (20.9 KiB) Downloaded 30 times

Gerber & Drill files:

Lizard Queen Large Gerber & Drill.zip: (15.97 KiB) Downloaded 25 times

Manfred · Post by **Manfred** » 07 May 2023, 22:05

I made another small PCB layout following nhalda's schematic using the transistors 2N2219 and MPSA92.

: Lizzard Queen Layout V2.JPG (164.04 KiB) Viewed 904 times

Ready-to-print PDF-files:

Lizzard Queen Layout V2 components side.pdf: (18.75 KiB) Downloaded 41 times

Lizzard Queen Layout V2 solder side.pdf: (3.04 KiB) Downloaded 41 times

SprintLayout6.0 file:

Lizard Queen V2.zip: (18.82 KiB) Downloaded 28 times

Gerber & Drill files:

Lizard Queen V2 Gerber & Drill.zip: (13.56 KiB) Downloaded 28 times

Lani · Post by **Lani** » 08 May 2023, 11:26

Here is my layout which should fit in a 1290NS/1590B. Just noticed I have the CB3 designator upside down, oh well. Enjoy, and have fun!!

tuck · Post by **tuck** » 10 May 2023, 15:03

Beware it's a really fiddly build.
I use the small alpha pots like this RD901F-40-15R1-B10K where you have to cut one of the spacers so it does not touch the solder pads beneath it.
Gerbers I sent to JLCPCB

lillizard.zip: (62.97 KiB) Downloaded 38 times