KENWOOD KA-8100
KA-8100
Rebuilding/Restoring the Kenwood KA-8100

Here is the insides of the amp as I received it. Lots of dirt, leaking capacitor on output board (orange cap in center), switches so dirty the amp would never play both channels at once.

01

Output Section after being removed from chasie.

02

The output section is completely disassembled and and thoroughly cleaned (see page two for an image of the reassembled ouput section). All boards are de-fluxed. New capacitor are installed. New Thermalcoat II is applied to output transistors.

03

Unit is stripped to the frame and washed. Here, it is stripped most of the way down...

04

Here we have the reassembled output section. Washed, de-fluxed and a complete set of new capacitors installed.

05

I use high quality computer grade capacitors (mostly Nichicon and NTE) for anything not in the audio path. For the audio path I use Nichicon Muse and ELNA Cerafine audio caps. These are some of the finest sounding caps available and are made specifically for audio equipment.

06

Preamp section prior to any work

07

Close up of cleaned and updated preamp. Switch cleaned with Deoxit, circuit board washed and de-fluxed. New cap installed (large ones anchored to prevent vibration induced noise) and Thermalcoat II applied to the power trasistor/heat sink surface.

08

Here, we can see the audio caps installed.

10

Back side of preamp section. washed and de-fluxed

11

This is a close up of the equalizer board. Washed, de-fluxed, new caps, DeOxit for the switch, polished RCA jacks.

12

Amplifier gets re-assembled. Here are the power supplies on a clean frame. Inspected, and voltage checked against specs.

13

Right side output transistors...

14

Here is the finished assembly. Bias current (14mv) and DC offset (0v) set to spec...

15
16

Here is the back side...

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18

Finsihed Unit... and it sounds sweet...

19


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