I did not want to write anything on the forum before I knew I could get life out of the unit.
In November 2022 the late oom Johan Potgieters son contacted me to help with the Halle Amplifier.
The amplifier is quite elaborate. 100 watt per channel, servo bias control, overload protection as well as grid drift compensation and cathode windings in the output transformer.
In the notes oom Johan stated that he battled with the overload that reset itself after a short while - he wanted it to stay latched when it tripped. Also, there is a spike pulse on the 500 vdc regulator as well as other small issues he never got to sort out before he passed on.
Tonight, is the night I got the amplifier playing without any major issues.
I have to be honest that the amplifier scares me. The High-Tension supply runs at over 600 volts direct current. One flash and your corpse will be on the floor. It runs hot. It is very heavy. It has a huge legacy. Respect.
Still a couple of things to get sorted.
In November 2022 the late oom Johan Potgieters son contacted me to help with the Halle Amplifier.
The amplifier is quite elaborate. 100 watt per channel, servo bias control, overload protection as well as grid drift compensation and cathode windings in the output transformer.
In the notes oom Johan stated that he battled with the overload that reset itself after a short while - he wanted it to stay latched when it tripped. Also, there is a spike pulse on the 500 vdc regulator as well as other small issues he never got to sort out before he passed on.
Tonight, is the night I got the amplifier playing without any major issues.
I have to be honest that the amplifier scares me. The High-Tension supply runs at over 600 volts direct current. One flash and your corpse will be on the floor. It runs hot. It is very heavy. It has a huge legacy. Respect.
Still a couple of things to get sorted.
