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In Reply to: RE: Ladder stepped attenuator downsides please posted by pictureguy on August 14, 2015 at 14:35:53
used an older Theta DAC once: 7 volt + output: overloaded many stepped attenuators
Edits: 08/14/15Follow Ups:
How did the overload express itself?
Any chance it was the NEXT input stage which overloaded?
Too much is never enough
distortion at the louder music volumes.
IIRC it was an early issue with ARC preamps using opamp volume controls too.
and that's depends on which stage is placed the attenuator or volume control, I guess.
My SET300B integrated has the control between the first(input tube) and the second stage (driver tubes).
Btw, when you said larger resistors you mean 1w? 2w?
And what's wrong with the ladder attenuators, besides the complex break in?
regards
p.s. my digital source (Sony DVPNS999ES) output voltage is: 2 Vrms/10 kilohms
My connect at Parasound tells me with great authority that to replace the level pot, I need ONLY to use 1/4 watt resistors in a voltage divider net. I suspect that the GoldPoint series attenuator with 1/4 resistors (surface mount) would work Just Fine. The pair of resistors as a divider is if I have decided on the level and don't intend to mess with it.
A level control with 1w or 2w resistors? Pretty darn beefy. In that case I'd be tempted to measure the variable and replace with a divider OR simply modify the circuit for less gain. I don't know enough electronics to figure where such a major device would be of use. Except maybe as a speaker 'L' pad.
Isn't 2v output 'typical'?
Too much is never enough
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