This is emittor commoned matched pair NPN transistor module. this module has pair of NPN transistor that have excellent pair characteristics.
This module is designed to make your experiments easy. Use it on your bread board. You can use it for your original projects, of course
this module used for beatnic.jp’s products also.
This pair characteristics are good for VCA or VCF. You can use this module at everywhere of analog synth circuits.
#501 has no Temperature compensation resistor. you can add it outside of this module.
If you need it, choose #500
If you need PNP matched pair module, check out #504 Matched Pair PNP module or #503 Matched Pair PNP module with T.C also.
pin structure is designed as pin compatible with Japanese old good pair transistors like 2SC3381, 2SC5168 or 2SC1583.
main parameter is just like below.

Comparison of pair characteristic.

The difference of V_EB between two device (|V_EB1-V_EB2| )

The deffernce of h_FE between two device (h_FE1 / h_FE2 )