Author Topic: which diy bass preamp?..  (Read 53277 times)

deadastronaut

Re: which diy bass preamp?..
« Reply #60 on: March 26, 2013, 06:33:22 PM »

Yes, but not that big.


hmmmm i'll wait till you knock up yours and copy that then... :)
http://www.youtube.com/user/100roberthenry

https://deadastronaut.wixsite.com/effects

^ SPACE PATROL FUZZ/ NANO-8 MIDI DRUMS /CHASM REVERB / TREMSHIFTER / FAZE FILTER/ABDUCTOR II DELAY pcb's + WAH LIGHT PLATES. and sausa

deadastronaut

Re: which diy bass preamp?..
« Reply #61 on: March 27, 2013, 10:31:41 AM »
dooby dooby dooobyyyy ahhhh ahhhh ahhh ahhh ahh ahhhhhhhhhh... ;D

any news?
http://www.youtube.com/user/100roberthenry

https://deadastronaut.wixsite.com/effects

^ SPACE PATROL FUZZ/ NANO-8 MIDI DRUMS /CHASM REVERB / TREMSHIFTER / FAZE FILTER/ABDUCTOR II DELAY pcb's + WAH LIGHT PLATES. and sausa

JebemMajke

Re: which diy bass preamp?..
« Reply #62 on: March 27, 2013, 10:44:04 AM »
How about removing that 680k resistor after the vol pot, and using 1m pot for the volume. Because that's what you've changed from the original. Maybe that's your issue.

deadastronaut

Re: which diy bass preamp?..
« Reply #63 on: March 27, 2013, 10:45:56 AM »
ahhh yes... :icon_idea:

i'll try that.
http://www.youtube.com/user/100roberthenry

https://deadastronaut.wixsite.com/effects

^ SPACE PATROL FUZZ/ NANO-8 MIDI DRUMS /CHASM REVERB / TREMSHIFTER / FAZE FILTER/ABDUCTOR II DELAY pcb's + WAH LIGHT PLATES. and sausa

JebemMajke

Re: which diy bass preamp?..
« Reply #64 on: March 27, 2013, 11:41:20 AM »
If it hits the top too soon, use log for volume. I mean in reality that's gain pot. You could add master vol at the end. And than place sym/asym sili/germ diodes on the first vol pot, thus making that gain pot. :)

deadastronaut

Re: which diy bass preamp?..
« Reply #65 on: March 28, 2013, 05:58:37 AM »
going to try the other preamp today....see how that compares ;)


btw swapped that sw 100k for a 5k pot...gives a nice choice of range'.  8)


edit:
ok tried the other version, nice but i prefer the roundness of the bassman actually...both versions are @#$%ing loud...would these drive a speaker? just curious

i'll put the bassman back on breadboard... ;)
« Last Edit: March 28, 2013, 06:52:17 AM by deadastronaut »
http://www.youtube.com/user/100roberthenry

https://deadastronaut.wixsite.com/effects

^ SPACE PATROL FUZZ/ NANO-8 MIDI DRUMS /CHASM REVERB / TREMSHIFTER / FAZE FILTER/ABDUCTOR II DELAY pcb's + WAH LIGHT PLATES. and sausa

JebemMajke

Re: which diy bass preamp?..
« Reply #66 on: March 28, 2013, 10:18:50 AM »
Not sure if they would drive a speaker. The "sunn" is great for that lower kind of bass sound.  I've played in Santana/Clapton tribute band with it and it was great. And bassman was used in metal/rock situations.

I'm building ggg TDA20x0 amp. With Tda2040 and 1x12 cabinet. And I'll use one of these two ( or both ) as preamp. Just need that 4.7r 1/2w resistor, and that's the reason why this project is on hold till Monday / Tuesday.
Nice mod, why only 5k?

deadastronaut

Re: which diy bass preamp?..
« Reply #67 on: March 28, 2013, 10:28:54 AM »
5k seemed best i tried all from 1k to 100k...but i'll probably just keep it simple without the switch etc..

been trying to get a bit more mid control though....


http://www.youtube.com/user/100roberthenry

https://deadastronaut.wixsite.com/effects

^ SPACE PATROL FUZZ/ NANO-8 MIDI DRUMS /CHASM REVERB / TREMSHIFTER / FAZE FILTER/ABDUCTOR II DELAY pcb's + WAH LIGHT PLATES. and sausa

deadastronaut

Re: which diy bass preamp?..
« Reply #68 on: March 30, 2013, 09:56:30 AM »
another nice mod is switching caps on the tonestack...

switching between 2.2n as normal, and a 1nf...the 1nf makes it great for soft rounded bass.  ;)...and the rest of the stack responds nicely too.

i think i'll go with this for a build...seems nice to me, and no jump in levels either.

i left the bat85's off as they didn't seem to bring anything to the party, put the 680k on out to 'tame' the overall level to be acceptable to me, but still have enough as a boost on the overall volume if needed.



« Last Edit: March 30, 2013, 10:19:45 AM by deadastronaut »
http://www.youtube.com/user/100roberthenry

https://deadastronaut.wixsite.com/effects

^ SPACE PATROL FUZZ/ NANO-8 MIDI DRUMS /CHASM REVERB / TREMSHIFTER / FAZE FILTER/ABDUCTOR II DELAY pcb's + WAH LIGHT PLATES. and sausa

deadastronaut

Re: which diy bass preamp?..
« Reply #69 on: March 30, 2013, 01:09:37 PM »
here's the layout and pcb files for anyone interested...checked over, all looks fine. 8)

https://dl.dropbox.com/u/7464107/bassmanlayout.pdf

https://dl.dropbox.com/u/7464107/bassman%20pcb.pdf

making a few pcb's today...

btw i put the pads in for the bat85's if you really want them in...(optional) ;)



« Last Edit: March 30, 2013, 01:23:26 PM by deadastronaut »
http://www.youtube.com/user/100roberthenry

https://deadastronaut.wixsite.com/effects

^ SPACE PATROL FUZZ/ NANO-8 MIDI DRUMS /CHASM REVERB / TREMSHIFTER / FAZE FILTER/ABDUCTOR II DELAY pcb's + WAH LIGHT PLATES. and sausa

deadastronaut

Re: which diy bass preamp?..
« Reply #70 on: April 08, 2013, 06:19:30 PM »
pcb populated, layout tested+verified.

should have made more room for the 1uf /470n caps..but i squeezed em in ok...

now to design my etch... ;)

sounds nice with that switching caps, warm to bright...suits my taste. :)...great preamp.

cheers guys!..  8)
http://www.youtube.com/user/100roberthenry

https://deadastronaut.wixsite.com/effects

^ SPACE PATROL FUZZ/ NANO-8 MIDI DRUMS /CHASM REVERB / TREMSHIFTER / FAZE FILTER/ABDUCTOR II DELAY pcb's + WAH LIGHT PLATES. and sausa

J0K3RX

Re: which diy bass preamp?..
« Reply #71 on: April 08, 2013, 08:40:10 PM »
Looks nice and clean and simple! I like it!!
Doesn't matter what you did to get it... If it sounds good, then it is good!

jpwilksch

Re: which diy bass preamp?..
« Reply #72 on: April 09, 2013, 09:29:30 AM »
deadastronaut, i like how alive the bassman sounds in your clip - just what my bass has been missing too!

btw: do you have an active or passive bass?

deadastronaut

Re: which diy bass preamp?..
« Reply #73 on: April 09, 2013, 10:39:35 AM »
hi jp,

i have a passive 5 string, sounds great now, when i listen to it without it , i understand why i never really played it much...massive difference. 8)

re: the layout:

i'm adjusting the layout to fit small trimmers and shifting a few caps to fit better, i'll post the layout/pcb up when done, soon  ok.

cheers rob.


just finished etching my box, waiting for paint to dry...building today.  ;)




« Last Edit: April 09, 2013, 10:46:16 AM by deadastronaut »
http://www.youtube.com/user/100roberthenry

https://deadastronaut.wixsite.com/effects

^ SPACE PATROL FUZZ/ NANO-8 MIDI DRUMS /CHASM REVERB / TREMSHIFTER / FAZE FILTER/ABDUCTOR II DELAY pcb's + WAH LIGHT PLATES. and sausa

deadastronaut

Re: which diy bass preamp?..
« Reply #74 on: April 09, 2013, 11:18:51 AM »
http://www.youtube.com/user/100roberthenry

https://deadastronaut.wixsite.com/effects

^ SPACE PATROL FUZZ/ NANO-8 MIDI DRUMS /CHASM REVERB / TREMSHIFTER / FAZE FILTER/ABDUCTOR II DELAY pcb's + WAH LIGHT PLATES. and sausa

deadastronaut

Re: which diy bass preamp?..
« Reply #75 on: April 10, 2013, 12:30:15 PM »
DONE!... 8)







http://www.youtube.com/user/100roberthenry

https://deadastronaut.wixsite.com/effects

^ SPACE PATROL FUZZ/ NANO-8 MIDI DRUMS /CHASM REVERB / TREMSHIFTER / FAZE FILTER/ABDUCTOR II DELAY pcb's + WAH LIGHT PLATES. and sausa

J0K3RX

Re: which diy bass preamp?..
« Reply #76 on: April 10, 2013, 12:44:08 PM »
Once again you blow my mind with your design!
Doesn't matter what you did to get it... If it sounds good, then it is good!

deadastronaut

Re: which diy bass preamp?..
« Reply #77 on: April 10, 2013, 12:49:51 PM »
cheers jim,  my missus actually chimed in on this design...as i kept ''fannying around'' too much in her opinion....  ;D

http://www.youtube.com/user/100roberthenry

https://deadastronaut.wixsite.com/effects

^ SPACE PATROL FUZZ/ NANO-8 MIDI DRUMS /CHASM REVERB / TREMSHIFTER / FAZE FILTER/ABDUCTOR II DELAY pcb's + WAH LIGHT PLATES. and sausa

bluebunny

Re: which diy bass preamp?..
« Reply #78 on: April 10, 2013, 02:06:28 PM »
That's gorgeous, Rob.  Much kudos to Mrs. Astronaut for the design.
Ohm's Law - much like Coles Law, but with less cabbage...

deadastronaut

Re: which diy bass preamp?..
« Reply #79 on: April 10, 2013, 02:32:27 PM »
That's gorgeous, Rob.  Much kudos to Mrs. Astronaut for the design.

Mrs astronaut said '' thankyou.......beep........................beep...........very much.......beep........................beep...................... ;D
http://www.youtube.com/user/100roberthenry

https://deadastronaut.wixsite.com/effects

^ SPACE PATROL FUZZ/ NANO-8 MIDI DRUMS /CHASM REVERB / TREMSHIFTER / FAZE FILTER/ABDUCTOR II DELAY pcb's + WAH LIGHT PLATES. and sausa