Psychtar has a lot of sounds.....

[MartyMart]

.....for something that seems so simple !
Drones, Sitar, banjo, octave, Fuzz etc etc  :shock:
I wasn't expecting so much from it, but I can recommend it BIG TIME !
I've been running it through my Phase 45/Univibe and it takes on a life
of its own  
OK, its not "instant gratification" you have to put in some work with your
pickup selection/tone control, but ALL those sounds are in there.

Nice one Tim, a very enjoyable and "different" build .

If you're looking for something "not the norm" this is it !!

Marty.

[JimRayden]

Soundclips always accepted. Actually I'm burning to hear the banjo sounds from that.

------------
Jimbo

[MartyMart]

Soundclips always accepted. Actually I'm burning to hear the banjo sounds from that.

------------
Jimbo

Well if I can get "down on tape" - so to speak, the tones I'm hearing then
I'll do some on thursday.
I think you'll be "blown away" !!  
I forgot to mention all the "ring mod" and overtones available too !

Marty.

[JimRayden]

*The crows awaits in an anxious silence.*

---------
Jimbo

[tungngruv]

Marty, what did you use for the trannie? Mine sounds good, but...... I did not have the MPSA13, I had to use a 2N5089 (closest thing I had). I'm getting the sitar but the octave is more of a slicing "fuzz" instead of the octave. I also tried a 2N3904, and a couple other trannies but they wouldn't even allow an effect signal to be produced!!!!

[MartyMart]

Marty, what did you use for the trannie? Mine sounds good, but...... I did not have the MPSA13, I had to use a 2N5089 (closest thing I had). I'm getting the sitar but the octave is more of a slicing "fuzz" instead of the octave. I also tried a 2N3904, and a couple other trannies but they wouldn't even allow an effect signal to be produced!!!![/quote

MPSA13, your 5089 should be close, but I guess in this circuit, that could
make a LOT of difference ?
Have you tried a front pickup humbucker, with top rolled out and
playing very gently ?
Tone/Vol/picking etc makes a HUGE difference  :wink:
The overtones come out very well when you just "touch" the strings ...
and try some harmonics .. !   FAB

Marty.

[RDV]

The MPSA13 is a darlington(or 2n1) transistor with a gain of about 5000.
The 2N5809 has a gain of maybe 800.
Big diff.

RDV

[MartyMart]

The MPSA13 is a darlington(or 2n1) transistor with a gain of about 5000.
The 2N5809 has a gain of maybe 800.
Big diff.

RDV

Er.... WOW  that is a BIG diff !!
Thanks Ricky ,
Marty.

[RDV]

Hey Tungngruv! Build your own darlington with 2 2N5089!


RDV

[nelson]

here is a pic with the EBC markings for even more clarity, Being that I didnt know what the symbols meant within the transistor symbols I googled and got this.




Now I know

The Hfe with this configuration using 2N5089 is 800x800=640,000

V high

[jmusser]

This is what I've been saying all along! This is a really unique effect, and really interactive with your guitar volume and tone controls, as well as pick up selection and picking styles. I had no idea that the MPSA13 had that much gain. :shock: I hadn't looked up it's data sheet. I can see now, that you'd be way out of the ball park on gain to make the octave come alive. That's why when Tungngruv said that the octave wasn't much to talk about, I knew something had to be up with the transistor choice. The up octave on this thing is sweet.

[Torchy]

The gain is apparently the product of the two trannies (hfe x hfe) but the saturation voltage is higher - this means a larger on-state power dissipation and the effective hfe is reduced. Its really just an emitter follower anyway.

[Tim Escobedo]

I suspect any medium to high gain transistor would work OK. There's no particular reason to usa a darlington. The only reason I used a MPSA13 is because it was on the bench when I made the circuit. I got a ton of them a long time ago in a surplus bargain bin. So I tend to use them a lot.

[tungngruv]

Hey Tungngruv! Build your own darlington with 2 2N5089!

here is a pic with the EBC markings for even more clarity, Being that I didnt know what the symbols meant within the transistor symbols I googled and got this.

Thanks guys!!!!

[Paul Marossy]

The MPSA13 is a darlington(or 2n1) transistor with a gain of about 5000

Wow. And I thought 2N5089s were high gain!