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In Reply to: RE: LCR Phono stage posted by dave slagle on April 30, 2021 at 13:59:27
This is the silk volumcontrole.
The measurement is made with a load of 10k. With the more traditional load of 100k the peak is +15dB.
Full review on https://audio-creative.nl/projecten/diy-passieve-voorversterker-met-tvc-deel-1/4/
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I agree with you about this type of volume control.
Walter
That isn't necessarily representative of all magnetic volume controls.
This one isn't much better. And 5k output impedance is a very high output impedance.p.s where is the 10Hz-1000Hz part?
Edits: 04/30/21 04/30/21
5K output impedance? where did you get that number from? Did you read the source impedance of 500Ω in the plot title as 5000?
The full details including full bandwidth response against source impedance were in the referenced link titled "The details"
the LF plot from that link is below and aside from the settings with gain, the LF response doesn't change for a given source Z so repeatedly showing the 10-1000hz trace doesn't add any new info. The LF behavior is based on the inductance and once the full winding is used that number does not change. When a part of the winding is used to achieve gain then the sub 1kHz info can then be related to the source impedance.
dave
So I need to select at the best the source otherwise I will get a peak or a low pass?
This is a limit for me.
Walter
Oeps, sorry. Yes, the picture low resolution did make me read 5000 instead of 500
I wonder how it would measure as an AVC?
Tre'
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