This is the wiring diagram for the original TBT 2-Band EQ preamp.
This diagram shows the discontinued XTBT 2-Band preamp powering a set of J-Bass pickups.
Wiring Diagram for the discontinued TBIBT which has a dual buffer and 2-Band EQ. You can now use an AGDB/918-2 Adjustable Gain Dual Buffer and a NTBT/918 2-Band EQ or a NTMB+F 3-Band EQ in less space.
This is the wiring diagram for the Original TCT from the 1970’s
An old XTCT wiring diagram from the 1980’s
An old TCT wiring diagram from the 1980’s
Wiring Diagram for the discontinued EZQ Parametric Filter
Old Wiring Diagram for discontinued EZQ Parametric Filter.
Discontinued DTA1.x buffers were only 9V tolerant. They have been replaced with DB918.x so they can be used with NTMB, NTBT, or TCT preamps.
XTCT wiring diagram from the 1990’s
TCT wiring diagram from the 1990’s
This is a diagram of the NTMB from before it was 18V tolerant.
Wiring Diagram for the old 2-module NTMB-918FL with NTMB3. These modules have been merged into NTMB+FL.
NS2TMB is a discontinued 3-Band preamp that requires 2 9V batteries.
The discontinued MPXTBT is a combination of a Magnetic/Piezo buffer and a 2-Band EQ. Use a MPB2-918 and a NTBT/918 to get the same functions in less space. Or use an MPB2-918 and a NTMB+F for a 3-Band option still in less space.