Parts · Transistors

OC42

Ge PNP BJT TH.1 circuit uses this part.

Substitutes Ge PNP transistor

Matched on material, polarity and the limits below from the transistor parameter database. Pinouts and packages are not in that data: check the datasheet before you drop one in, and expect gain to change the sound.

This part

Part	hFE min	Vce	Ic	Pc	fT
OC42	70	15 V	50 mA	0.05 W	7 MHz

Used on other boards here

Part	hFE min	Vce	Ic	Pc	fT	Boards
SFT308	70	12 V	100 mA	0.15 W	6 MHz	2
2N408	65	18 V	70 mA	0.15 W	6.7 MHz	5
2N1307	60	15 V	300 mA	0.15 W	8 MHz	6
2N1309	80	15 V	300 mA	0.15 W	12 MHz	1
OC46	80	20 V	125 mA	0.083 W	2 MHz	1
NTE102	90	16 V	150 mA	0.15 W	2 MHz	3
2N527	80	30 V	500 mA	0.225 W	2 MHz	2
P416A	60	12 V	25 mA	0.1 W	60 MHz	1

Closest by the numbers

Part	hFE min	Vce	Ic	Pc	fT
GT2696	70	15 V	50 mA	0.15 W
2SA64	65	12 V	40 mA	0.08 W	6 MHz
2SA79	70	12 V	200 mA	0.055 W	3 MHz
2N407	65	18 V	70 mA	0.15 W	6.7 MHz
2SA207	70	15 V	200 mA	0.2 W	5 MHz
GT2694	80	15 V	50 mA	0.15 W
ACY38	75	15 V	100 mA	0.15 W	5 MHz
2N1998	70	15 V	500 mA	0.25 W	5 MHz

Faceplate	Circuit	Based on	Category	Vendor	Box	Knobs	Price	BOM
	Event Horizon 2N2907A · 2N5088 · OC42 Paul Trombetta Rotobone · 1590BBS	Paul Trombetta Rotobone	Fuzz	Naegele Audio	1590BBS	3	—	48