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|16th September 2003, 07:58 PM||#1|
Join Date: Dec 2002
Location: The Netherlands
Aleph P input attenuator
The four switches in the Aleph P schematic are used for adjusting the input levels.
When sw 1.1 and 1.4 (just one input) are open, i get -3dB ( 20log(22100/32100).
With sw 1.1 open and 1.4 closed i get -13 dB (20log(2886/12886)
But these are not the values which Nelson notes in the Aleph P service manual.
What am i doing wrong ???
Or am i missing some other resistors that should be included in the calculation ?
ps : i want to learn more about this because i want to be able to calculate input and output levels, like in the P and BoSoZ
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