Before poking in your Hammond, please note that HammondsCanKillYou.
The most popular setting for the four [Percussion] switches in the B-3 family of Hammonds is the where all four switches are rocked toward the rear of the console. With this setup the percussion VOLUME switch is in the __SOFT__ postion. When this switch is rocked toward the front of the console, the __NORMAL__ position, the volume of the percussion signal increases while the volume of the drawbars signal decreases. A simple modification can be performed that will eliminate the decrease in the drawbar volume, while still allowing the volume of the percussion signal to be increased when the __NORMAL__/__SOFT__ switch is set to the __NORMAL__ position.
-The percussion drawbar-volume drop is inherent in many organs, including ALL B-3, C-3, A-100, and
RT-3 organs
. To solve this on those models, you can jumper out a resistor on the matching transformer assembly, which is the round metal-enclosed thing mounted on the upper right side (looking from the back) of the organ.
+The percussion drawbar-volume drop is inherent in many organs, including ALL B-3, C-3, A-100, RT-3 and the M3
. To solve this on those models, you can jumper out a resistor on the matching transformer assembly, which is the round metal-enclosed thing mounted on the upper right side (looking from the back) of the organ.
+
* Remove the two screws securing the cover, and notice a group of resistors mounted on a strip on the left side of the matching
transformers. The resistor to jumper out is the lowest one on the left ~[in a B/C-3, this is R1 (3.9Meg), in an M-3,
it's R2 (1Meg).]
