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
Feel free to visit our homepage, for the moment itīs all in Swedish:
http://hem.passagen.se/ccriders/index.htm