Switchable Hi-Z input impedance, how ?

[tinitus]

finally someone noticed it
I didn't know when I found it, and thougt it was just a weird worthless component
until I searched, and found its very rare, and 'wanted' for classic distortion sound

could be fun to try it, but would be a shame to destroy it
and I don't know much about it at all

why would you want it ?

 

[shanx]

Well

No Reason really ..just looked interesting..if you were throwing it away
Yes can make a nice fuzzy sound.

 

[tinitus]

I searched again where i found it, but ofcourse only this one

there is also a SFT 320
also old transistor
do you anything about that one ?

 

[shanx]

Another Ge, PNP transistor..have not seen much on it. Pretty rare I imagine.

 

[shanx]

For OC44 you can build up a nice little vintage fuzz
http://fuzzcentral.ssguitar.com/rangemaster/rangemasterschematic.gif

 

[tinitus]

looks similar to what I have seen mentioned as Rangemaster ?

noticed the lowish input impedance....if you can call 68K lowish ?
I suppose it will need a high-z buffer ?
any idea about output impedance ?

 

[shanx]

or Fuzzface, sorry previous link is more of boost circuit.

 

[tinitus]

Fuzzface .... that was a great keyword, thanks

btw, I have noticed that the jfet 2sk170 gives a nice soft gnarly sound too, when overdriven or 'starved'(not sure what)

 

[shanx]

I have a bunch of J201 and 2N5457 , trying out on my guitar preamp. 2SK170 look good for that too. Biased a bit hot or cold will give slight differences pushing into saturation or cutoff.

 

[tinitus]

hey, I found a few older Motorola 2N2369
supposedly also a good one for making fuzz pedal
I will give them a try
is there a way to make it 'less fuzzy' ?

 

[tinitus]

for further reading, look up Yaff Fuzz Face, and Axis Face

I have no interest in 9V battery drive, but will have a regulated supply with higher voltage
any suggestions ?

 

[tinitus]

I think handles are too expencive

 

[tinitus]

nah...wood handles would look better on a kitchen drawer

alu handles seems more...'appropriate'

 

[tinitus]

time to try Kean's K-multiplier

 

[PeteMcK]

OC44? - takes me back - about 45 years...

 

[tinitus]

OC44? - takes me back ...

..... how about the other less famous SFT 320 ?

 

[tinitus]

ripped two satelite receivers two more boxes in the works

 

[tinitus]

they should slip nicely into this box
(and a pic of my new revised handle design)

 

[tinitus]

scaringly tight but it fits ...what a relief

 

[tinitus]

DIY is hard work