Attachments
So just to be clear.
220vac into BLU/YEL & 220vac into WHT
Jumper BLK/RED & BRN together
This is what I did, and was wanting confirmation of.
Michael
220vac into BLU/YEL & 220vac into WHT
Jumper BLK/RED & BRN together
This is what I did, and was wanting confirmation of.
Michael
You might want to try using the 230 volt tap first and check output voltages, especially the heater voltage. If it's too low under load switch to the 220 one.
Mains electricity - Wikipedia
Standard ISO IEC 60038:1983 defined the new standard European voltage to be 230 ( ± 23 ) V.
Hi,
the mains voltage is nominal 230V here in germany. But the real Volts are differs from the area where you live. In the rural areas it may vary stronger than in cities where substations are mostly close together.
In my place I´ve got 225-230V at daytime and 235-240V at night time. And the voltages are always are bit different between the 3 phases.
A valve amp should set to 230V or 240V if the selector has no 230V setpoint , that really protect your valves.
73
Wolfgang
the mains voltage is nominal 230V here in germany. But the real Volts are differs from the area where you live. In the rural areas it may vary stronger than in cities where substations are mostly close together.
In my place I´ve got 225-230V at daytime and 235-240V at night time. And the voltages are always are bit different between the 3 phases.
A valve amp should set to 230V or 240V if the selector has no 230V setpoint , that really protect your valves.
73
Wolfgang
My mains voltage has never been close to 230. After I get this preamp built and working if it looks like I need to set it at 230 I will. It will depend on what my B+ and filament voltages are.
Michael
Michael
This is a bit off-topic, but a couple of years ago one of my amplifiers intermittently stopped working and I had to investigate. Turned out that the closest transformer in the village (this is part rural area) had been upgraded and now we have closer to 240V than 230V that it was before (230 is still nominal over here as other have told). It was an overvoltage protection in a class D amplifier module that caused it. Eventually I switched to another amplifier module instead of modifying the transformer (a few additional turns on the secondary in the other direction could have solved it).