Parts · Transistors

2N508

Ge PNP BJT TH.2 circuits use 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	3
SFT337	100	15 V	100 mA	0.15 W	1 MHz	3
2N527	80	30 V	500 mA	0.225 W	2 MHz	2
2G381	75	20 V	500 mA	0.25 W	1 MHz	5
ASY33	90	30 V	300 mA	0.15 W	0.5 MHz	1
2SB54	80	20 V	150 mA	0.15 W	0.5 MHz	5
NTE158	90	32 V	1000 mA	1.6 W	1.5 MHz	1
2SB56	80	25 V	150 mA	0.15 W	0.5 MHz	1

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
	Maestro FSH-1 Filter Sample/Hold Vero28×28 Unverified 1458 · 2N3906 · 2N508 · J201 Maestro FSH-1 Filter Sample / Hold	Maestro FSH-1 Filter Sample / Hold	EQ / Filter	Dirtbox Layouts	—	5	—	15
	Hype Tubes 2N508 Rift EL34 · 1590B	Rift EL34	Overdrive	Fuzz Dog	1590B	3	£31.20	15