Hello guys!
A fresh new APEX A40 PCB layout is here, the RED Devil Edition! In this thread group-buys for the printed circuit boards are arranged.
It's a bipolar BJT based Class-AB amplifier with symmetrical "current feedback" input stage topology and triple emitter follower (TEF) output stage, and it is state of the art of the APEX AB-Class Audio Reference Power Amplifier. Power rating is 100W/8R0 and sound is very pleasant.
Group Buy Information:
The PCBs are 122mmx105mm 2-Layer, 1.6mm FR4, 70micron copper, HASL finish, white silkscreen and red solder mask, as shown in the above pictures.
> The PCBs cost US$10 a piece. (One PCB is for one channel, so for stereo amplifier you need 2PCBs)
> After the GB list is full, each user will be contacted and sent the first invoice for PCB cost, and the rest (including shipping charge, packing and processing charge and PayPal charge) is to be paid before shipping the boards, for which the second invoice will be sent.
Shipping Information:
All PCB will be send to buyer address using Registered Post with tracking number. Delivery date is around 10-30 days depends on country.
List Information:
Please write your diyaudio forum nickname (country) - number of boards.
Group Buy list is open for everyone that wants to get these nice Red Edition Boards for Audio Reference Amplifier APEX A40.
Group Buy - APEX A40 List
ronovar (CROATIA) - 2pcs
A fresh new APEX A40 PCB layout is here, the RED Devil Edition! In this thread group-buys for the printed circuit boards are arranged.
It's a bipolar BJT based Class-AB amplifier with symmetrical "current feedback" input stage topology and triple emitter follower (TEF) output stage, and it is state of the art of the APEX AB-Class Audio Reference Power Amplifier. Power rating is 100W/8R0 and sound is very pleasant.
Group Buy Information:
The PCBs are 122mmx105mm 2-Layer, 1.6mm FR4, 70micron copper, HASL finish, white silkscreen and red solder mask, as shown in the above pictures.
> The PCBs cost US$10 a piece. (One PCB is for one channel, so for stereo amplifier you need 2PCBs)
> After the GB list is full, each user will be contacted and sent the first invoice for PCB cost, and the rest (including shipping charge, packing and processing charge and PayPal charge) is to be paid before shipping the boards, for which the second invoice will be sent.
Shipping Information:
All PCB will be send to buyer address using Registered Post with tracking number. Delivery date is around 10-30 days depends on country.
List Information:
Please write your diyaudio forum nickname (country) - number of boards.
Group Buy list is open for everyone that wants to get these nice Red Edition Boards for Audio Reference Amplifier APEX A40.
Group Buy - APEX A40 List
ronovar (CROATIA) - 2pcs
Does this design really use the Sanken output devices? For some reason I was thinking that they were obsolete?
This is designed for MT-200 Sanken outputs but you can use TO264 devices in output stage...pads and hole size is universal on pcb for TO264 and MT200.
Here you can see TO-264 output devices...pcb is universal so it can accept both MT-200 and TO-264.
Hello, red devil edition? is this another modification of the A40 circuit? Perhaps you could include the schematic for your boards.
https://easyupload.io/1ndsh0
- RED PCB
- IPS+VAS for REG PSU + OPS for UNREG PSU
- TO-92 thermally coupled face to face
- Short routing for fast IPS
- GND separating so no GND loop
- Universal PCB for outputs for TO264 and MT-200
- Red Devil Edition is name because this is improved A40.