Parts · Transistors

ASY33

Ge PNP BJT TH.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
ASY33	90	30 V	300 mA	0.15 W	0.5 MHz

Used on other boards here

Part	hFE min	Vce	Ic	Pc	fT	Boards
2SB56	80	25 V	150 mA	0.15 W	0.5 MHz	1
2N527	80	30 V	500 mA	0.225 W	2 MHz	2
2N526	65	30 V	500 mA	0.225 W	1 MHz	1
NTE158	90	32 V	1000 mA	1.6 W	1.5 MHz	1
MP41A	50	30 V	150 mA	0.15 W	1 MHz	2
GT402B	60	25 V	500 mA	0.6 W	1 MHz	2
2N1382	50	25 V	200 mA	0.25 W	1 MHz	1
AC151	30	24 V	200 mA	0.9 W	1 MHz	2

Closest by the numbers

Part	hFE min	Vce	Ic	Pc	fT
2SAB38	85	25 V	150 mA	0.15 W	0.8 MHz
2N1379	85	25 V	200 mA	0.25 W	0.4 MHz
AC193K	90	32 V	2000 mA	0.26 W	1 MHz
2N571	100	25 V	300 mA	0.15 W	1.2 MHz
ACY19	80	30 V	500 mA	0.26 W	1 MHz
2N572	100	25 V	300 mA	0.12 W	1.2 MHz
2N569	70	25 V	300 mA	0.15 W	0.8 MHz
2N1188	80	45 V	500 mA	0.2 W	1 MHz

Faceplate	Circuit	Based on	Category	Vendor	Box	Knobs	Price	BOM
	Modded Tone Bender Mk. III ASY33 · EFT83 · LT1054 · LT1054CP Sola Sound Tone Bender Mk. III · 125B	Sola Sound Tone Bender Mk. III	Fuzz	Naegele Audio	125B	3	—	32