Dan Armstrong Red Ranger modifications

modified Dan Armstrong Red Ranger

The Dan Armstrong Red Ranger was developed as a more versatile and less noisy alterative than the Electro-Harmonix LPB-1 (Linear Power Booster). A center-off DPDT switch provided three modes: Bass, Full, and Treble, with Full being the off position. The above schematic is an update to JD Sleep's version, adding a negative ground power supply and use of common transistors. Also, while testing the original schematic, the values of the filter resistors adjusted for a more unified output level.

Listen to it!

modified Dan Armstrong Red Ranger perfboard layout

Red Ranger
transistor pin voltages
(9.07v battery)
Q1 (2N5088)Q2 (2N5088)Q3 (2N5087)

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