Parts · Transistors

GT404B

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
GT404B	60	25 V	500 mA	0.6 W	1 MHz

Used on other boards here

Part	hFE min	Vce	Ic	Pc	fT	Boards
2SD352	100	30 V	1000 mA	0.6 W		2

Closest by the numbers

Part	hFE min	Vce	Ic	Pc	fT
AC141H	40	30 V	1200 mA	0.72 W	1 MHz
AC176-01	100	20 V	2000 mA	0.8 W
AC181KL	50	20 V	1000 mA	2.5 W	2 MHz
2N4077	50	20 V	1000 mA	8 W	1 MHz
AC402	25	32 V	1500 mA	0.5 W
SFT186	40	140 V			90 MHz
2N102	10	30 V	1500 mA	1 W	0.4 MHz
2N144	10	30 V	800 mA	1 W	0.2 MHz

Faceplate	Circuit	Based on	Category	Vendor	Box	Knobs	Price	BOM
	Splinter 1T308B · GT404B	—	Fuzz	Dead End FX	125B	2	$12.00	20