Parts · Transistors

GT310B

Ge PNP BJT TH.4 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
GT310B	60	10 V	10 mA	0.02 W	120 MHz

Used on other boards here

Part	hFE min	Vce	Ic	Pc	fT	Boards
GT309B	60	10 V	10 mA	0.075 W	120 MHz	2
P416A	60	12 V	25 mA	0.1 W	60 MHz	1
GT308B	50	11 V	150 mA	0.15 W	120 MHz	1
OC42	70	15 V	50 mA	0.05 W	7 MHz	1
MA287	30	10 V	200 mA	0.175 W		1
2N408	65	18 V	70 mA	0.15 W	6.7 MHz	5
OC44	100	12 V	10 mA	0.083 W	8 MHz	19
OC41	35	16 V	50 mA	0.05 W	4 MHz	6

Closest by the numbers

Part	hFE min	Vce	Ic	Pc	fT
2N1753	50	18 V	50 mA	0.03 W
SFT174	60	20 V	25 mA	0.1 W	125 MHz
ACY13	50	16 V	50 mA	0.05 W
2N1727	50	12 V	50 mA	0.06 W	100 MHz
2N267	60	12 V	10 mA	0.035 W	30 MHz
2N984	50	10 V	100 mA	0.06 W	175 MHz
2N501	70	12 V	50 mA	0.06 W	80 MHz
2N311	50	15 V	50 mA	0.075 W

Circuit	Based on	Category	Vendor	Box	Knobs	Price	BOM
Ltava Fuzz Wah - modified Vero25×24 Unverified GT310B · KP103K · KT315A · MAX1044 Ltava Fuzz Wah	Ltava Fuzz Wah	Fuzz	Dirtbox Layouts	—	5	—	47
Poltava Fuzz Wah sans LFO Vero21×16 Unverified GT310B · KT315A Poltava Fuzz Wah sans LFO	Poltava Fuzz Wah sans LFO	Fuzz	Dirtbox Layouts	—	2	—	28
Slava Ukraine GT310B · KP103G · KP103L · KT315A Ltava Fuzz Wah · 1590DD	Ltava Fuzz Wah	Tremolo	PCB Guitar Mania	1590DD	8	€1.00 out	127
Sputnik II/III 2N7002 · CJ3407-ES · GT310B · J201 Spaceman Effects Sputnik II · 1590BB2	Spaceman Effects Sputnik II	Fuzz	Naegele Audio	1590BB2	4	—	66