Preamp ideas for F5

[Zen Mod]

rubbish

 

[tinitus]

so its rubbish and not F5, and what then ?

or the whole schematic is rubbish and wont work at all ?

 

[Zen Mod]

what what then ?

output Jfets are overbiased and will go puff , either with current and with voltage

 

[tinitus]

output Jfets are overbiased and will go puff , either with current and with voltage

ah, ok, I would use +/-20V

would that help ?

a few missing resistors maybe ?

 

[Zen Mod]

yes , source resistors for output Jfets

 

[tinitus]

ofcourse
do you have any possible size in mind ?

I can just as well admit its not for F5, just to make that clear
but I might use it for my bass guitar, maybe

 

[Zen Mod]

God save me ........ another basshead

look no further : http://www.diyaudio.com/forums/pass-labs/125893-preamp-ideas-f5.html#post1555551

 

[tinitus]

great, thanks

and it was in the 2. post only, sooorry...I should have noticed guess I better start reading now

 

[tinitus]

look no further : http://www.diyaudio.com/forums/pass-labs/125893-preamp-ideas-f5.html#post1555551

another silly basshead question is it possible to go high Z (1Mohm) with that one ?

 

[Zen Mod]

yup

considering that cable capacity influence will not harm your thick wires frequencies

but , there are better things , made exactly for bass guitars

 

[tinitus]

but , there are better things , made exactly for bass guitars

ah, teasing me thinking of anything specific ?

 

[tinitus]

no, you are absolutely right, there are better things, but wont there always be

but its a spot on match for the requirements I have for my specific input stage
high-Z input with a little gain(6-12db), and running on +/-20V

 

[Zen Mod]

you'll probably get more bone with simple Jfet BOZ

 

[tinitus]

ah, will have look, thanks

ehh, I take it there are multiple versions
any particular one to look at ?

 

[tinitus]

you'll probably get more bone with simple Jfet BOZ

ah, I see, have that one in my bass preamp file already, from google

but high 0/+ voltage

 

[tinitus]

but you are right
from reading jfet boz thread, it really is tempting for bass input
simpler, and very well documented

and seems Nelson actually found lower distorting with lower voltage, so taking the positive rail of the +/-20V ought to work ok

 

[tinitus]

you'll probably get more bone with simple Jfet BOZ

looks like I managed to find the parts

 

[vdi_nenna]

I think the 10 ohm at the Source is 22 ohms if voltage is dropped to 16v.

 

[Zen Mod]

vdi , be serious

some info : Discrete FET Guitar Preamp

jfet guitar preamp - Google ????????

 

[vdi_nenna]

I thought they were building the boz-j.