Parts · Transistors

SFT308

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
SFT308	70	12 V	100 mA	0.15 W	6 MHz

Used on other boards here

Part	hFE min	Vce	Ic	Pc	fT	Boards
2N408	65	18 V	70 mA	0.15 W	6.7 MHz	5
2N1307	60	15 V	300 mA	0.15 W	8 MHz	6
2N1309	80	15 V	300 mA	0.15 W	12 MHz	1
NTE102	90	16 V	150 mA	0.15 W	2 MHz	3
OC46	80	20 V	125 mA	0.083 W	2 MHz	1
2N527	80	30 V	500 mA	0.225 W	2 MHz	2
2G381	75	20 V	500 mA	0.25 W	1 MHz	5
MP20A	50	20 V	300 mA	0.15 W	2 MHz	1

Closest by the numbers

Part	hFE min	Vce	Ic	Pc	fT
GT2696	70	15 V	50 mA	0.15 W
2N303	75	10 V	200 mA	0.15 W	6 MHz
2SA207	70	15 V	200 mA	0.2 W	5 MHz
ACY38	75	15 V	100 mA	0.15 W	5 MHz
2N1998	70	15 V	500 mA	0.25 W	5 MHz
2N407	65	18 V	70 mA	0.15 W	6.7 MHz
GT2694	80	15 V	50 mA	0.15 W
2SA168A	70	18 V	50 mA	0.175 W	4 MHz

Faceplate	Circuit	Based on	Category	Vendor	Box	Knobs	Price	BOM
	Elka Dizzy Tone Vero16×16 Verified SFT308 · SFT352 Elka Dizzy Tone	Elka Dizzy Tone	Fuzz	Dirtbox Layouts	—	3	—	16
	Elka Dizzy Tone Vero19×8 Unverified SFT308 · SFT352 Elka Dizzy Tone	Elka Dizzy Tone	Fuzz	Tagboard Effects	—	3	—	15