KLH Model Nine, how do I depot the wax cans?


I have a pair of klh 9's and one has lower gain with some distortion in the tweeter as well. On the recommendation of David Janszen I swapped supplies and both problems follow the supply (tweeter distortion and low gain). I had also cleaned all contact assemblies on the power supply connectors and tweeters.

I want to rebuild the weak supply and looking at it I see lots of wax. I was wondering how I would depot the cans (melt out or chip out the wax). If anyone has any ideas it would be appreciated

Andy
andy_p

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A lot of organic solvents such as lacquer thinner would work as well- don't use heat with them though as they will ignite very easily. Be careful with the too. If it is too high, it will burn the wax and make a mess of things as it will leave carbon which is conductive. I do not know if he warned you, but those voltages are near the limit before it arcs through air, hence the wax potting. Often special high voltage probes are used. Not just for a the aforementioned reasons, but for safety as well.
It should have said "Be careful with the HEAT too. If it is too high, it will burn the wax and make a mess of things as it will leave carbon which is conductive."