Hughes & Kettner clean channel help

[llemar]

Hello all,
           I have this amplifier as in the subject (Hughes & Kettner Tube 50). I would like to modify the clean channel EQ. I accept that I set the sound according to the attached sketch. In this regard, I have a question for the experts - Which of the components of change to get the same sound (set in the sketch).
Thank you for the hint and best regards.

[Jana]

Set the controls to the "I have" diagram. Carefully pry the knobs off and put them back on with the pointers in the "I need" positions.

[surfsup]

If you change C18 from 330pF to 500pF, that might be all you need. More treble will effectively reduce the mids and bass a bit.

btw, jana, that was funny

[Reeltarded]

Set the controls to the "I have" diagram. Carefully pry the knobs off and put them back on with the pointers in the "I need" positions.

Hahahahaaaa my face hurts

[tictac]

Looks like you want less treble and bass but more mid-range.

If that's the case then you need to lower the value of C-18 (33pF) try 150pF for starters. Also change R-26 (33k) to 100k.

Try that to begin with. Changing C-20 from .02 to .01 uF will give you a midrange boost but you may not need it after you make the first two changes...

This is a complex circuit with more going on in front of the tone controls than most tube amps but the first two changes should make a noticable diffrence

TT

[gingertube]

Above advise is good.

To see some ideas about manipulating tone controls look at the 3 tone stacks and the switch in changes for the 6 "sounds" of the 3 channel H&K TriAmp
http://www.webphix.com/schematic%20heav ... triamp.pdf

Cheers,
Ian

[llemar]

Thanks for the tips. As soon as I make any changes will notify

[surfsup]

Looks like you want less treble and bass but more mid-range.

If that's the case then you need to lower the value of C-18 (33pF) try 150pF for starters. Also change R-26 (33k) to 100k.

Try that to begin with. Changing C-20 from .02 to .01 uF will give you a midrange boost but you may not need it after you make the first two changes...

This is a complex circuit with more going on in front of the tone controls than most tube amps but the first two changes should make a noticable diffrence

TT

Whoops i had it backwards..!