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Old 30th July 2009, 08:38 PM   #11
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Quote:
Originally posted by Sjef
And a picture of the signal on the loudspeaker output of the amp, with input shorted, no connection to other equipment, other equipment turned off and the use of a schaffner mains filter. In other words, idle state.

This scope picture tells nothing, please post the scales.
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Old 30th July 2009, 08:48 PM   #12
Sjef is offline Sjef  Netherlands
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sorry, forgot.
It's 0.5uS/div and 0.5V/div
peak to peak is about 6 divisions
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Old 31st July 2009, 01:10 PM   #13
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Quote:
Originally posted by Sjef
sorry, forgot.
It's 0.5uS/div and 0.5V/div
peak to peak is about 6 divisions
This is correct, it's a switching amplifier......

Before we can help you, you need to give full information how you wired everything and post some pictures of the internal.

Regards,

Jan-Peter
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Old 31st July 2009, 09:06 PM   #14
tiki is offline tiki  Germany
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Hello,
the UcD(180) performs definitely better:
UcD_Output_20Hz
UcD_Output_100Hz
UcD_Output_1kHz
UcD_Output_20kHz
UcD_Output_Ripple
As one may see, the residual ripple is around 1Vpp or 350mVrms.
Regards, Timo
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Old 31st July 2009, 09:19 PM   #15
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Quote:
Originally posted by tiki
Hello,
the UcD(180) performs definitely better:
UcD_Output_20Hz
UcD_Output_100Hz
UcD_Output_1kHz
UcD_Output_20kHz
UcD_Output_Ripple
As one may see, the residual ripple is around 1Vpp or 350mVrms.
Regards, Timo

Of course...., the UcD180 runs on dual 45V whereby the UcD700 runs on dual 90V.....

Jan-Peter
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Old 1st August 2009, 12:21 AM   #16
Sjef is offline Sjef  Netherlands
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Hi Jan-Peter,

Yes I know this kind of voltage is normal for a switched mode amp. I was expecting a more perfect sine wave here. Seems there is some corrolation between the riples in the sinewave and the radiated pulseform I measure.

I will take pictures but it's going to take two weeks beacuse I'm away for two weeks but I wil defenatly come back on this, hope to get everything o.k with the wiring.

with best regards,

Sjef
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