Parts · Transistors

2N3638

1 circuit uses this part.

Substitutes Si 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
2N3638	30	25 V	500 mA	0.3 W	100 MHz

Used on other boards here

Part	hFE min	Vce	Ic	Pc	fT	Boards
2N2907	35	40 V	600 mA	0.4 W	200 MHz	22
MPSA92	25	300 V	500 mA	0.625 W	50 MHz	1
2N5401	60	150 V	600 mA	0.31 W	100 MHz	1
2N4403	100	40 V	600 mA	0.31 W	200 MHz	4

Closest by the numbers

Part	hFE min	Vce	Ic	Pc	fT
2N2695	30	25 V	500 mA	0.3 W	100 MHz
2N2696	30	25 V	500 mA	0.3 W	100 MHz
2N5040	30	25 V	1000 mA	0.3 W	100 MHz
PN5142	30	20 V	500 mA	0.3 W	100 MHz
PN5143	30	20 V	500 mA	0.3 W	100 MHz
BC126A	30	40 V	600 mA	0.3 W	100 MHz
MPS6535	30	30 V	600 mA	0.31 W	130 MHz
BF323	30	25 V	600 mA	0.4 W	150 MHz

Faceplate	Circuit	Based on	Category	Vendor	Box	Knobs	Price	BOM
	AR-324 Lag and LFO 2N3638	—	Ring Mod / Synth	Experimentalists Anonymous	—	1	—	7