Jawari Problems

[Tim Escobedo]

As shown, the Darlington version has more gain, the idea that it could be capable of octave-up effects. But it's more complicated. BTW, a regular BJT would probably work in there as well.

[tazwolf]

I win......the prize for biggest moron.
I decided to biuld my Jawari on breadboard because I'd read about some of the problems that people have been having. So I borrowed one that has holes in groups of 5 both vertically and horizontally.

I checked the board for continuity with a voltmeter and all was fine until I got the Jawari on there and of course it did not work - I knew there was something fundamentally wrong but as I am new to building pedals I knew not what.

I got a PCB layout from Paul Marossy (Mega thanks) so I could compare with the schematic and mine was laid out similarly (according to Tims E schematic on snippets- what is going on?!?!?! Removed the 1K resistor and the silicon diode got really hot - this is so very wrong most people gat hardly a signal yet I can't hear anything but the diode is burning up? Turned out that the horizontal holes of 5 are not just connected to each other but to the next group of 5 as well across the whole breadboard - and I had my 9v battery coming in on these further along the board - oh no. Fixed that -

I now have a working JAWARI!!!!!!!!!! and it is seriously cool (Thanks Tim E)- using an SG  it works on all pickups selections but better or worse on different parts of the fretboard but always plucking near to the bridge. I have a lot more than unity gain.

Experimenting with changing components and stuff - now it works.

I have it plugged into my Adrenalinn II on the Hiwatt Amp setting "talking bout my chicken masala"

So is there a prize for temporarily having a lower IQ than a plank of wood?

/Taz

[tazwolf]

I win......the prize for biggest moron.
I decided to biuld my Jawari on breadboard because I'd read about some of the problems that people have been having. So I borrowed one that has holes in groups of 5 both vertically and horizontally.

I checked the board for continuity with a voltmeter and all was fine until I got the Jawari on there and of course it did not work - I knew there was something fundamentally wrong but as I am new to building pedals I knew not what.

I got a PCB layout from Paul Marossy (Mega thanks) so I could compare with the schematic and mine was laid out similarly (according to Tims E schematic on snippets- what is going on?!?!?! Removed the 1K resistor and the silicon diode got really hot - this is so very wrong most people gat hardly a signal yet I can't hear anything but the diode is burning up? Turned out that the horizontal holes of 5 are not just connected to each other but to the next group of 5 as well across the whole breadboard - and I had my 9v battery coming in on these further along the board - oh no. Fixed that -

I now have a working JAWARI!!!!!!!!!! and it is seriously cool (Thanks Tim E)- using an SG  it works on all pickups selections but better or worse on different parts of the fretboard but always plucking near to the bridge. I have a lot more than unity gain.

Experimenting with changing components and stuff - now it works.

I have it plugged into my Adrenalinn II on the Hiwatt Amp setting "talking bout my chicken masala"

So is there a prize for temporarily having a lower IQ than a plank of wood?

/Taz

[Paul Marossy]

"So is there a prize for temporarily having a lower IQ than a plank of wood?"

Well, I don't know what a good prize is for that, but don't feel too bad. I tried using a dual timer chip (556) for something not long ago, but I didn't realize that there were certain rows connected together. So, I had stuff connected wrong, and the chip got so hot that it started to melt my breadboard.  :oops:

Anyhow, congratulations! Great feeling, isn't it?

[tazwolf]

Paul - it's a luvvvley feeling absooooluuuuutley.

Thanks for your help!

/Taz

[Paul Marossy]

Glad to be of service, Taz.