Name:    JT
Email:   jt@ccriders.cjb.net  
Subject: Amp mods
Thread:  71
Time:    Fri, 15 Mar 2002 15:22:40 UTC

Hereīs 2 small modifications Iīve made to my MM 210HD-130 (12ax7 splitter).


1. Replace cap C12 (3.3 nF connected to the treble pot) with 3 x 1 nF in parallell. Use bright switch to connect 1 or 3 caps. With 1 nF the midrange dip has it maximum at about
1 kHz instead of 500 Hz, making the amp sound a bit softer.


2. Put a 150Kohm pot in series with R49 (56Kohm, 68Kohm with SS splitter, connected to imdedance switch). I replaced the tremolo speed pot, cause I never use tremolo. When impedance is increased the negative feedback decreases and changes the amps frequency response. A bit more "ringing" sound.


If anyone is intressed in schematics I can
send them by email.


Greetings from Sweden
JT


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