Parts · Transistors

2SD30

Ge NPN BJT TH.2 circuits use 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
2SD30	50		200 mA	0.3 W	0.5 MHz

Used on other boards here

Part	hFE min	Vce	Ic	Pc	fT	Boards
AC176	52	20 V	1000 mA	0.22 W	1 MHz	20
AC127	50	12 V	500 mA	0.34 W	1.5 MHz	15
GT404B	60	25 V	500 mA	0.6 W	1 MHz	1
2SD77	40	25 V	100 mA	0.15 W	2 MHz	1
2SD352	100	30 V	1000 mA	0.6 W		2
2N1304	40	20 V	300 mA	0.15 W	4 MHz	4
AC187	100	15 V	2000 mA	0.225 W	1 MHz	7
2N388	60	20 V	200 mA	0.15 W	7 MHz	2

Closest by the numbers

Part	hFE min	Vce	Ic	Pc	fT
NKT781	52	20 V	1000 mA	0.215 W	0.5 MHz
NKT713	50	15 V	500 mA	0.15 W	1 MHz
NKT773	50	12 V	300 mA	0.15 W	1 MHz
2N214	45	25 V	100 mA	0.18 W	0.3 MHz
AC181	50	16 V	1000 mA	0.3 W	2 MHz
2N525	44	30 V	500 mA	0.225 W	1 MHz
NKT717	40	30 V	150 mA	0.15 W	0.5 MHz
AC185	50	16 V	500 mA	0.27 W	2 MHz

Faceplate	Circuit	Based on	Category	Vendor	Box	Knobs	Price	BOM
	ThroBak Strange Master Perfboard Verified 2N2222A · 2SD30 Dallas Arbiter Rangemaster	Dallas Arbiter Rangemaster	Boost	Effects Layouts (blog)	—	2	—	14
	ThroBak Strange Master Vero10×9 Verified 2N2222 · 2SD30 Dallas Arbiter Rangemaster	Dallas Arbiter Rangemaster	Boost	Tagboard Effects	—	2	—	13