Parts · Transistors

2N170

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
2N170	20	6 V	20 mA	0.025 W	1 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	2
MP37B	25	30 V	20 mA	0.15 W	1 MHz	1
MP10B	25	30 V	20 mA	0.15 W	1 MHz	1
MP38A	45	15 V	20 mA	0.15 W	2 MHz	4
2N1304	40	20 V	300 mA	0.15 W	4 MHz	2
AC127	50	12 V	500 mA	0.34 W	1.5 MHz	3
GT404B	60	25 V	500 mA	0.6 W	1 MHz	1
2N1306	60	15 V	300 mA	0.15 W	8 MHz	1

Closest by the numbers

Part	hFE min	Vce	Ic	Pc	fT
2N356	20	18 V	500 mA	0.1 W	1 MHz
2SC89	20	15 V	400 mA	0.12 W	1 MHz
2SC89H	20	15 V	400 mA	0.12 W	1 MHz
AC330	20	24 V	50 mA	0.125 W	1 MHz
2N594	20	20 V	300 mA	0.15 W	1 MHz
2N679	20	20 V	200 mA	0.15 W	1 MHz
2N817	20	15 V	400 mA	0.075 W	2.5 MHz
2N818	20	15 V	400 mA	0.075 W	2.5 MHz

Faceplate	Circuit	Based on	Category	Vendor	Box	Knobs	Price	BOM
	Misc Theremin 2N170 · TIX882	—	Ring Mod / Synth	Experimentalists Anonymous	—	—	—	14