Parts · Transistors

2N508

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
2N508	120	16 V	200 mA	0.2 W	2 MHz

Used on other boards here

Part	hFE min	Vce	Ic	Pc	fT	Boards
NTE102	90	16 V	150 mA	0.15 W	2 MHz	1
2G381	75	20 V	500 mA	0.25 W	1 MHz	1
GT402B	60	25 V	500 mA	0.6 W	1 MHz	1
MP41A	50	30 V	150 mA	0.15 W	1 MHz	1
NKT213	50	18 V	250 mA	0.2 W	0.5 MHz	1
AC128	45	16 V	1000 mA	1 W	1 MHz	9
OC79	50	13 V	300 mA	0.55 W	0.2 MHz	1
NKT275	30	15 V	250 mA	0.2 W	0.5 MHz	3

Closest by the numbers

Part	hFE min	Vce	Ic	Pc	fT
2SA459	120	14 V	200 mA	0.15 W	2 MHz
ACY38VII	125	15 V	100 mA	0.15 W	1.5 MHz
2N1194	125	25 V	200 mA	0.2 W	1.2 MHz
2N1185	130	30 V	500 mA	0.2 W	1.4 MHz
2N1190	100	30 V	500 mA	0.2 W	2 MHz
2N1471	100	12 V	200 mA	0.2 W	3 MHz
2N609	90	15 V	200 mA	0.18 W	1.8 MHz
2N3428	125	30 V	500 mA	0.2 W	5 MHz

Faceplate	Circuit	Based on	Category	Vendor	Box	Knobs	Price	BOM
	Hype Tubes 2N508	Rift EL34	Overdrive	Fuzz Dog	1590B	3	£31.20	16