FAQ
Quad 405 Replacement Transistors
This is the complete list. The original Quad transistor is in Italics our preferred alternative is in Bold.
Click on the hyperlink to see the Datasheet or to buy the transistor in the Dada Electronics Webshop.
- TR1: BC214C - BC559C BC560C BC415C
- TR2: ZTX304 - BCX32 BC682 BC546B MPSA06
- TR3/TR4: ZTX504 - BC556B
- TR5/TR6: BC560C BC415C BC559C
- TR7/TR8: 40872 - 2SA740 BD242C 2N6134 TIP42C BDX78
- TR9/TR10: 17556 - 2SD424 2SD676 2N3773 MJ15003
- The Bridge-diode can be replaced by KBPC3504
All other Quad 405 replacement components are available in the Dada Electronics Webshop as well, or send an e-mail to info@dadaelectronics.eu.
Quad 303 Replacement Transistors
This is the complete list. The original Quad transistor is in Italics our preferred alternative is in Bold.
Click on the hyperlink to view the datasheet or to buy the transistor in the Dada Electronics Webshop.
- TR1: 38494 - 2N3055 MJ15003 TR2: 38494 - 2N3055 MJ15003 (or Push-pull alternative*MJ15004)
- TR3: 40411 - MJ15003
- TR100: BC154 - BC560
- TR101/TR107: BC109 - BC109 BC237C
- TR102/TR103: U17219 - BC546B
- TR104: U17229 - BC556B
- TR105: 38496 - BC461 2N5322
- TR106: 38495 - BC141-16 2N5320
- TR200: U17229 -BC556B
- TR201: 38495 - BC141-16 2N5320
- MR 100/101/105/106 can be replaced by 1N4148
* The 303 can be modified to a PNP/NPN Push-pull amplifier using the Dada Electronics boards up to version 22 or standard boards.
All other Quad 303 replacement parts are available from in Dada Electronics Webshop as well or send an e-mail to info@dadaelectronics.eu.