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In Reply to: RE: How important is the bypass resistor on a stepped attenuator posted by Lew on August 11, 2014 at 08:07:21
"shunt attenuator" consists of a discrete single value resistor in series with the signal, and a variable resistance (which can be implemented in many ways, with a plastic pot or discrete resistors) to ground, aka the shunt or bypass resistance. Is that what you have in mind, in your first sentence?Yes, sorry for the poor discription. A fixed value discrete resistor in line with the signal and a variable shunt resistor. This is just a test project for now. I'm happy with the volume around 38-40db on the chart listed in the FIFTH post down
I have to read up more on the differences between series and ladder. I'll see if I can find the table posted in I believe audiokarmas DIY group.
charles
Edits: 08/11/14Follow Ups:
"I'm happy with the volume around 38-40db ..."
Wow, you have a lot of gain there!
Have you ever though about eliminating some electronic gain stages to get the over all gain structure of your system closer to what you need?
Tre'
Have Fun and Enjoy the Music
"Still Working the Problem"
This is a Marantz NA7004 streaming player, aka DAC, feeding directly into the back of the power amp.
I'm simply putting a "volume control" between the two. No preamp, only a source, cablein, volume control,cable out and amp.
I think you need to be especially cognizant of the impedance matching, which is a bit tricky with a shunt attenuator, but I am sure you can do it.
OK, I guess there's not much else you can do.
Tre'
Have Fun and Enjoy the Music
"Still Working the Problem"
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