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DIY Stompboxes => Building your own stompbox => Topic started by: QSQCaito on February 21, 2007, 05:10:51 PM

Title: Mini Stratoblaster doubt.
Post by: QSQCaito on February 21, 2007, 05:10:51 PM
Hi, i just bought stuff for my stratoblaster. The dude forgot to put the tranny into the bag :@ now i've gotta go just for that.. But.. there won't be any difference using 82ohm instead of 100ohm resistor right?? Im building the Stratoblaster(improved) at GGG.

Bye bye!

DAC
Title: Re: Mini Stratoblaster doubt.
Post by: brett on February 22, 2007, 04:40:53 AM
The stratoblaster is a very forgiving circuit.  None of the components values are critical.
It's cool.
Title: Re: Mini Stratoblaster doubt.
Post by: QSQCaito on February 22, 2007, 10:24:07 AM
Thanks brett!

Now I have to go 30min trip downown just to get one j201..  >:( And I'll have to do it because I want to play my guitar, and until that I won't be able to play it
Bye bye, thanks.

DAC
Title: Re: Mini Stratoblaster doubt.
Post by: petemoore on February 22, 2007, 10:30:15 AM
  And I'll have to do it because I want to play my guitar, and until that I won't be able to play it
  Don't we [some of us] know how that is...Sheeezsh...got 20 of 'em working to choose from, but until THIS one works, I just won't be right.
  I am 'weak'...[ at least I admit it ], I should be able to focus after putting 'this' on the backburner but suffer from lack of attention span, my attention pulled toward the thing which should not be [not working].
Title: Re: Mini Stratoblaster doubt.
Post by: QSQCaito on February 22, 2007, 10:49:00 AM
I share that pete, indeed a lot.
My problem might be bigger.. is not that i want it to play. It's going right inside my stratocaster ;D. So it's indeed impossible until I have it. I'm not going to put all the strings calibrate, etc etc etc. and then tear all apart..

I have a lespaul my cousin never used and gave it to me.. he used it when he was 20 to 25 then abandoned musci for 3d art.. and it's mine now :p but i love my strato!!

BTW, where can i put the battery so it will be "accesible" for changing??(inside the strato)

Thanks a lot!
Title: Re: Mini Stratoblaster doubt.
Post by: JimRayden on February 22, 2007, 11:14:34 AM
Quote from: QSQCaito on February 22, 2007, 10:24:07 AM
Now I have to go 30min trip downown just to get one j201..

Do yourself a favour, get twenty. ;)

---------
Jimbo
Title: Re: Mini Stratoblaster doubt.
Post by: QSQCaito on February 22, 2007, 04:56:19 PM
Jimbo, is what I did. I said one j201.. they didnt' have any J-FET at that house :-/

I went 10min trip to another one.

Hi, do you have j201'?.. let me check, i don't think so (shit shit shit i was saying)

yes.. ok give me twenty.. i have 16 give them all :P...

They're MPF102, he told me they were the same. Are they really the same?


I always regret not buying quantity.. i also bought wire i think 025. And i didn't want to spend all my dad's money.. so i bought just red.. went back to the truck and my dad told me: you should have bough at least 3 colors..
I thhink today I learned a lesson.
Title: Re: Mini Stratoblaster doubt.
Post by: Meanderthal on February 22, 2007, 09:16:07 PM
QuoteThey're MPF102, he told me they were the same. Are they really the same?

No. They're lower gain than j201. Should work fine though.
Title: Re: Mini Stratoblaster doubt.
Post by: QSQCaito on February 22, 2007, 09:23:10 PM
Ok ;) thanks once again.. you saved me dozen times meanderthal :D:D:D

Would there be a lot of gain difference between one and another? And.. it'll sound good with the mpf, or I need to change some resistor values'?

Thanks a lot

BYE BYE

DAC
Title: Re: Mini Stratoblaster doubt.
Post by: christobean on February 22, 2007, 09:42:46 PM
you could try putting the battery in the back compartment where the tremolo springs are. im not sure how much space is in tehre but it would be a lot easier to take that back cover off tahn the entire pickguard
Title: Re: Mini Stratoblaster doubt.
Post by: QSQCaito on February 22, 2007, 09:55:55 PM
I'll try and play around with the battery to see where it fitts. I don't use the tremolo, so maybe thats an advantage.

Bye bye

thanks a lot
DAC
Title: Re: Mini Stratoblaster doubt.
Post by: Meanderthal on February 22, 2007, 09:57:50 PM
 Both will give you well over unity gain. I'm no expert at biasing jfets, but the schematic I saw called for J201, 2N5457, or other jfet. MPF102 qualifies as 'other'...
Title: Re: Mini Stratoblaster doubt.
Post by: QSQCaito on February 22, 2007, 10:05:46 PM
thanks a lot meanderthal ;) If i have any problem I'll post it.


OT: Im running my bluesbreaker of a 9v battery measuring 2.2  can it be my MM wrong, or can it actually work out of 2.2v?