Parts · Transistors

2N233

Ge NPN BJT TH.1 circuit uses this part.

Substitutes Ge NPN 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
2N233	3	10 V	100 mA	0.15 W	2 MHz

Used on other boards here

Part	hFE min	Vce	Ic	Pc	fT	Boards
2N1302	20	25 V	300 mA	0.15 W	1 MHz	6
2SD77	40	25 V	100 mA	0.15 W	2 MHz	1
2N1304	40	20 V	300 mA	0.15 W	4 MHz	4
AC130	50	15 V	100 mA	0.145 W	2 MHz	2
2N1101	25	15 V	100 mA	0.18 W	0.1 MHz	2
AC127	50	12 V	500 mA	0.34 W	1.5 MHz	15
AC176	52	20 V	1000 mA	0.22 W	1 MHz	20
2N1306	60	15 V	300 mA	0.15 W	8 MHz	13

Closest by the numbers

Part	hFE min	Vce	Ic	Pc	fT
2N2568	10	15 V	100 mA	1 W	1.4 MHz
2N1994	15	15 V	300 mA	0.15 W	3 MHz
2N634	15	20 V	300 mA	0.15 W	5 MHz
2N585	20	15 V	200 mA	0.12 W	2 MHz
2SC90	20	15 V	400 mA	0.12 W	2 MHz
2SC90H	20	15 V	400 mA	0.12 W	2 MHz
NKT732	20	25 V	300 mA	0.15 W	2 MHz
2N357	20	18 V	500 mA	0.1 W	2 MHz

Faceplate	Circuit	Based on	Category	Vendor	Box	Knobs	Price	BOM
	Misc Theremin 2N170 · 2N233 · TIX882	—	Ring Mod / Synth	Experimentalists Anonymous	—	—	—	46