Shootout for Science, April 15th

[GrindCustoms]

On March 25th, the new Sunking layout by Brian will be available.

We will now have 3 different klone layout to choose from, with Aion's Refraktor and my own Chimaera.

Couple weeks ago, i've come up with that idea in a build thread by JabulaniJohnny, seen here:
http://www.madbeanpedals.com/forum/index.php?topic=14217.0

Soon as Brian have the Sunking stocked, i'll order one and one of Aion layout aswell.

But!! I do need to get these shipped to a forum member who has the required equipement to make an efficient analysis of the «Tone Print» of each circuits, using the same components.

To do so, i will on my end ship a ChimaeraBFD PCB with sockets installed on it for all of the components, all the components and all the strip sockets needed to do the same on the two other boards.

I will also include the 3 pots and footswitch, all of them will have the commodity of being able to hook up to the different circuit without being a PITA.

This is seriously just for the well of science and my personnal curiosity since these 3 layouts are based on the exact same schematic.

Who's up to the work of analysing?

Cheers!

Rej

[ddog]

Looks like it is the 5th now. Im hoping the build docs would be up before.

The  shoot out should also be someone with the original klone - it will be somewhat of a control in this sciencey experiment

[GrindCustoms]

Looks like it is the 5th now. Im hoping the build docs would be up before.

The  shoot out should also be someone with the original klone - it will be somewhat of a control in this sciencey experiment

I've thought of that... but who has a Klone, a scope, a function generator, a pink noise microphone and an audio analysis program?

I have the pink noise microphone and RCF audio analysis software tho...

My goal with this shootout is to see if differences between how layouts are made can really affect the tone of 3 identical circuits using the exact parts.

Using a Klon in there, would mix the data collect... no problem with it if the Klon owner is willing to depopulate and socket is Horsy!

[JakeFuzz]

I have access to a few really cool pieces of equipment here at work. I have an old Stanford Research spectrum analyzer, Agilent function generators, Agilent network analyzers, HP LCR meters and a really fast oscilloscope. Send me a PM and we can figure out what you want to do.

Edit: And I also have a bunch of Klones (probably 3 or 4 right now including an EHX soul food)

[GrindCustoms]

I have access to a few really cool pieces of equipment here at work. I have an old Stanford Research spectrum analyzer, Agilent function generators, Agilent network analyzers, HP LCR meters and a really fast oscilloscope. Send me a PM and we can figure out what you want to do.

Edit: And I also have a bunch of Klones (probably 3 or 4 right now including an EHX soul food)

Awesome!

If you're willing to go through all of them, charting the data with a list of test to proceed, you're the man.

Speaking of tests, i think that doing a spreadsheet would be the way to go, it will compile and those interested in this shootout could also chime in.

All input is welcomed so we can make this the most accurate possible and be sure to pick the most valuable information. I think a lot can be learned from an experiement like this. 

[JakeFuzz]

I wouldn't mind. Most of these tests dont take more than a few minutes to setup and run. I would have to come in during the weekend but that is no big deal.

I think there are 4 pieces of info you should get and they will all be charts as a function of frequency. Swept sine frequency response, harmonic frequency response, input impedance and output impedance. All of these can be done on the spectrum analyzer (or the FFT function on our Agilent scope) and the LCR meter. I can sweep up to 120kHz on the SA but the LCR has discretized frequencies up to around 400kHz (I think). You can do this at a few settings for each circuit. The pots should be connected either via sockets or breadboard so you can use the same pots and settings for each data point on each circuit. Honestly I expect to very little difference between the circuits though.

[Jabulani Jonny]

Hey I was mentioned in a thread?!  I'm blushing...no really.   

That would be a pretty sweet test, but like Jake says, I'd expect next to no difference since they should be based on the same schem; I know that the Refractor and Chimaera are any way. 

Would be a cool test though. 

[GrindCustoms]

Today is the Day!

Hey Jake, do you happen to have a KingSlayer?

[madbean]

Today is not the day, unfortunately.

http://www.madbeanpedals.com/forum/index.php?topic=14988.msg140607#msg140607

If I could at least get shipping notification I'd be happy to add the upcoming boards to the sale. I don't feel too comfortable doing that until I at least know they are on the way.

[GrindCustoms]

Today is not the day, unfortunately.

http://www.madbeanpedals.com/forum/index.php?topic=14988.msg140607#msg140607

If I could at least get shipping notification I'd be happy to add the upcoming boards to the sale. I don't feel too comfortable doing that until I at least know they are on the way.

Ah! Missed that one.

No need to pre-order, my task to keep an eye on this

[Tremster]

Post your science results on TGP!

[juansolo]

Post your science results on TGP!

With the sheer amount of P&W players on there, any lack of discrepancy would only be attributed to the devils work...

[GrindCustoms]

Post your science results on TGP!

With the sheer amount of P&W players on there, any lack of discrepancy would only be attributed to the devils work...

That might actually be interesting!

[alanp]

I used my Kingslayer for a few months in church.

Went back to the LaVache, with very careful use of the Cosmopolitan.

[raulduke]

My guess: they will sound damn near identical 

Maybe a gnats bollocks difference between them (due to component tolerances etc.).

I think the more important factors for many DIY'ers is the form etc. for ease of building (PCB size, pcb mounted pots, jack locations, io location, component orientations etc.).

I'll be interested to read your findings though.