OHVM Precision Rectifier

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Original poster: "David Sharpe by way of Terry Fritz <teslalist-at-qwest-dot-net>" <sccr4us-at-erols-dot-com>

Terry, All

I hope to post OHVMIIdoc.doc to hotstreamer this week.  Tonight
I checked performance of Precision Rectifier.  I used a 120/240
Primary
12/24 (wired 24) sec control transformer.  My dropping resistor was
a 1.0K, 5%;  divider resistors of 10k (11:1), 100k (101:1) and 1.0M
(1001:1) provided attenuation ratios in parenthesis.  Input VAC was
27.1Vrms during testing.

Note measured Vpeak values (Tektroniz TDS220) versus theoretical
calculated Vpeak values.  All I can say is WOW!

Vin rms  27.1
Atten ratio    11:1          101:1        1001:1
Vmeas (V)    3.480       0.380        0.043
Vtheory(V)    3.488      0.380        0.038

Noise Floor = 5mV
Worse Case Delta between each "half" of precision rectifier
                    ~3.2mV

I think my accuracy problem has been solved...   :^))

Regards
Dave Sharpe, TCBOR
Chesterfield, VA. USA