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RE: RH84 : updated measurements ...

With B+ off the rectifier (UF4007 full wave) of 300VDC :

Total power output before clipping : 3W RMS

Gain = 6.36

THD = 2.43% @ 2.75W RMS measured with ARTA

2nd harmonic = -34.64dB, 3rd harmonic = -36.62dB ,
4th harmonic = -48.47dB, 5th harmonic = -55.28dB

60 cycle below -80dB, 120 cycle below -60dB

I failed to match the designers benchmark of 1% distortion at 4W RMS.

Perhaps deviations from the original design or using cheap AES PT-31 OPT's is a contributing factor.

That is it for now.



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  • RE: RH84 : updated measurements ... - deathtube 667 17:15:53 01/22/15 (0)

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