booster cap sub for treble cut / boost

[petey twofinger]

i put a boost circuit (stereo / dual ) in my mini amp and its a bit treblie .

whioch cap do i change to adjust the treble .

there are 2 amps i did both need mods .

one is a smally npn boost the other is a amz mosfett .

i will post schemos if needed , busy , its my B-day , gotaa run @


oh and thanks .

[pinkjimiphoton]

happy birthday leif!!

sent ya a little something via US mail....

that said, i'd need to look at the schematics, but you can always bleed some treble off to ground with a small value cap maybe?  take it right from the input cap, i'd imagine or just before it...

[Gus]

Try a LPB like boost with the lower input resistance.

Look at some of my recent posts, in one I have a graph of input resistance changes.

[petey twofinger]

amz :



npn boost , i do remember the energy drink image ...



again i need to reduce the treble .... thinking of switching a cap value or even having two (actually four cause its stereo ) sets of caps on switches , but this may be too comlex or messy ... hmmm . its really treblie , the guitar has actives , with the tone all the way down on the guitar , the wah on in heel position its still a bit much .

[petey twofinger]

curious which capacitor controls the amount of treble in the twop above circuits . i need to reduce the treble .

thanks in advance

[midwayfair]

Several easy places:

Increase C2
put a 100-220pf cap between the gate and drain
put a small cap (1n or smaller) to ground after C4
Put a 1-2K resistor between C4 and the output

[petey twofinger]

thank you , i am gonna monkey with this soon . today i tried PJP's suggestion and it did do the trick but i have no easy acess to that cable / jack to cut it in . the booster board however is very easy to acess , so ...