 path edu!magnesium club cc edu!new sei edu!fs7 ec edu!europa eng gtefsd com!howland reston an net!zaphod mp ohio-state edu!moe ksu ksu edu!crcni1 unl edu!mpaul from mpaul unl marxhausen paul newsgroup sci electron subject re passiv mixer date 29 apr 1993 12 42 39 gmt organ univers nebraska--lincoln line 32 distribut messag-id 1roifvinnd9n crcni1 unl refer 1rmk8t 8l0 cat ci brown edu 1rmsbuinn59f minerva ci yale edu nntp-post-host unlinfo unl shaffer-wendi yale wendi shaffer write i'm build mixer friend mine thing singl boom box circuit op-amp power coupl 9v batteri kind power suppli but catalog passiv mixer guitar advertis taht appear power doe circuit adapt rca jack save friend alot mess batteri plug thank well fastest crudest mixer physic connect input directli signal resistor common output the resistor isol signal sourc drive directli take wild seat-of-the-pant guess i'd mix high-imped sourc dynam mike electr guitar pickup resistor 5k - 10k if mix line-level stuff output walkman i'd 1k input 1 -- -------------+--- output input 2 -- -------------+ input 3 -- -------------+ -- paul marxhausen univers nebraska - lincoln grace 