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Old 28th May 2011, 06:15 PM   #1
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Default Tekko Audio Labs releases its first complete amp module

This is the first full amplifier channel module with onboard power transistors released by Tekko Audio Labs.

The design is based on the Famous Douglas Self excellent blameless amplifier topology.

Previous versions were only frontend and driver but now here it is, a full amplifier on one single board, featuring SMD resistors and capacitors for the small signal circuitry.

http://i.imgur.com/2UB3u.png

The prototype runs TIP35 and TIP36 but you can use virtually any power transistor, and with a maximum rail voltage of 50V per rail, this amplifier can produce up to 200 watts in 4 ohms and up to 100 watts in 8 ohms with Four output transistors with a VCEo of atleast 120V.
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Old 28th May 2011, 06:17 PM   #2
lineup is offline lineup  Sweden
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Good work, Tekko
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Old 28th May 2011, 06:27 PM   #3
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No more fly wires between a driver board and the output transistors, just need to add the oscillationpreventer caps on the drivers that i forgot.
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Old 28th May 2011, 09:04 PM   #4
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The circuit will be coming up shortly.
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Old 28th May 2011, 09:25 PM   #5
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Looks similar to the old 1980's Maplin 225WRMS amplifier.
That had 2n3055/mj2955 output transistors.
It used bd711/712 drivers.

Click the image to open in full size.
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Old 28th May 2011, 09:40 PM   #6
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Here comes the circuit:

http://i.imgur.com/0x2Qf.png
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Old 28th May 2011, 11:56 PM   #7
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A hint with EAGLE - rather than use the Jumper component to make jumpers, just use traces on the Top layer This means you do not have to alter your schematic when you find out you need a jumper someplace.
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Old 29th May 2011, 12:00 AM   #8
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Quote:
Originally Posted by jaycee View Post
A hint with EAGLE - rather than use the Jumper component to make jumpers, just use traces on the Top layer This means you do not have to alter your schematic when you find out you need a jumper someplace.
The cad software I use is similar.
Layer 0 is the silk screen layer.
This is fine as long as the track width is greater than 1 otherwise the autorouter thinks it isnt routed. It also fools the continuity checker.
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Old 29th May 2011, 12:04 AM   #9
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Quote:
Originally Posted by jaycee View Post
A hint with EAGLE - rather than use the Jumper component to make jumpers, just use traces on the Top layer This means you do not have to alter your schematic when you find out you need a jumper someplace.
Yup, especially if you spend as long as I do tweaking a layout.
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Old 29th May 2011, 08:57 AM   #10
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You mean because this makes the schematic look better/cleaner ?
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