ION Systems Obelisk 100 60w integrated amplifier for spares or repair.
Please read the description carefully as returns will not be accepted.
Sadly, this amp was working perfectly until I decided to replace the power capacitors at which point the limits of my competence became startlingly clear and things went decidedly pear shaped. Needless to say, what appeared on the face of it, to be a simple job turned out far more complicated and i have decided to sell now and but my losses before I am tempted to do more damage.
So, two power caps replaced only- nothing else has been touched.
Problems installing the caps has meant I’ve had to wire them in to ensure both sides of the PCB are soldered properly.
The caps are secured properly (photo taken before this was done)
After various symptoms and hums, the final status is as follows:
The amp powers up and the indicator lights/selectors function normally. No hums or buzzesNo burning smells or obvious signs of heat/smoke damage or obviously damaged components that I can seeThe amp measures 22 volts DC at the right speaker outputs. If a speaker is attached to the right output, it will extend out alarmingly, and if left on, serious damage will result ie DO NOT POWER UP WITH SPEAKERS ATTACHED UNLESS YOU REALLY DO KNOW YOU’RE DOING AND THE SPEAKERS AREN’T WORTH ANYTHING!The left output appears normal and apart from a small bump upon power up/off looks and sounds fine.
This was a great sounding amp and I’m guessing that anyone with some proper knowledge will be able to repair it, so potentially a real bargain to be had here
I am of course gutted and have learned a costly lesson, but hope that the next owner can bring the amp back to life and enjoy it again.
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