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Old 2nd Dec 2017, 11:22 pm   #3
Michael Maurice
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Join Date: Feb 2006
Location: Wembley, Middlesex
Posts: 7,219
Default Re: Leak Stereo 20 and TL12 Plus in need of recommissioning - Help&Guidance Needed.

My first rule when servicing these types of amplifier is to change the coupling caps to the output valves. I also replace as a matter of course the grid leak resistors and if they are out of spec the phase splitters anode load resistors. This is non negotiable. SERIOUS DAMAGE CAN OCCUR IF THESE COMPONENTS ARE NOT REPLACED.

In fact I go further with this, I replace all old paper /wax, Hunts mouldseals and anything that looks suspicious.

I use vishay 2W metal resistors rated at 500V and Vishay axial capacitors rated at either 400V or 630V polyester types and Vishay electrolytic capacitors.

They are fairly simple amplifiers that are easily serviced, but do sound good when working.
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