Leak Amplifier Repairs
Leak TL/12 Plus Amplifier
The amp had no valves fitted so after they were obtained the voltages on the anodes of the phase splitter were way out as were the EL34 voltages. The capacitors also needed replacing .25µF and .1µF, as did the 91k resistor and 100k 3w ones, they were way too high resistance. The main can capacitor had dumped the liquid inside, 64µF and 100µF capacitors were fitted inside after removing the insides of the old capacitor. Sounded ok after all that for a 60yr old amp.
Leak 2000 Receiver
The sound was intermittent, switches needed soaking in WD40, bad connector on tuner output, then phono eq noisy. I replaced the yellow electro capacitors in the phono eq; 2.2µF and 22µF. There was also a problem with the PSU, the regulated +16V had disappeared somewhere. Turned out the 68k resistor to the Zener had gone open circuit.
Leak Delta 70
This one blew the fuses on switch on, couldn't see any problem so powered it up with a lamp in the mains input which lit brightly for several minutes till the HT came up. It then powered up without it okay, guess the capacitors needed reforming after being un-powered for many years. Pushing sound through it showed one channel was lower than other.
Leak Stereo 20
This old Leak was humming through the speakers. The 32 µF+32 µF capacitor was looking sorry for itself and was replaced. The EL84 cathode capacitors 47 µF 25V and the two electrolytic 47µF 10 V in the ECC83s cathodes were also replaced. The 100 ohm resistor had been replaced by 2 x 220 ohms in parallel! All I had was a 2 W 100 ohm which soon burnt up, after replacing the capacitor and 100 ohm resistor for the correct one, the current was acceptable, cleaned the EL84 pins as they were a bit tricky making contact in the sockets.