Weber Java build - some oscillation

[martin manning]

Most DVMs will show a reading on AC volts even if the AC is ultrasonic. Just connect the DVM across the speaker terminals. With no sound from the guitar, the reading should be something less than 100mV. An ultrasonic oscillation will be several Volts.

Good tip, thanks!

[M Fowler]

Great job in getting your amp up and running, very nice.

Now you can tell all the Java builders on Weber forum how to solve their issues.

Mark

[rdjones]

Most DVMs will show a reading on AC volts even if the AC is ultrasonic. Just connect the DVM across the speaker terminals. With no sound from the guitar, the reading should be something less than 100mV. An ultrasonic oscillation will be several Volts.

Good tip, thanks!

Check the AC response of the meter.
On some meters there will be a low pass filter to keep noise from interfering with accurate 60 Hz measurements.
On many Flukes it's switchable.


rd