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Chip Amps Amplifiers based on integrated circuits

In search of a perfect attenuator
In search of a perfect attenuator
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Old 3rd April 2006, 08:58 PM   #51
jleaman is offline jleaman  Belgium
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What i mean with progress was any idea when you will be offering this soon ?
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Old 3rd April 2006, 09:07 PM   #52
Peter Daniel is offline Peter Daniel  Canada
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No idea, I'm afraid.
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Old 3rd April 2006, 10:01 PM   #53
A. J. Gandulfo is offline A. J. Gandulfo  Argentina
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Lightbulb LOGIC

Dear Peter

You can design a logic using just 6 CMOS 8INput NAND's an another CMOS 4X2INput NAND's, a 23 positions one pole switch and a few not expensive components.

I understand these solution is just 23 steps.

Your solution is better, these is a cheaper one.

Nice job.


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Old 23rd July 2006, 10:56 PM   #54
johngalt47 is offline johngalt47  United States
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In search of a perfect attenuator
Default Any progress?

Peter,
Any progress yet?
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Old 24th July 2006, 12:05 AM   #55
jleaman is offline jleaman  Belgium
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Default Options

Peter do you know what options you are going to have with this project Do you know if yuo are goig to have different models and stuff ones with more features or not ?

Just asking that is all.


Jase
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Old 24th July 2006, 12:44 AM   #56
Peter Daniel is offline Peter Daniel  Canada
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I need to ask Veteran about progress, as he was developing software. The boards layout is completed, the only option might be different resistor choices.

On a control board therte is an option for source selector.
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Old 24th July 2006, 05:52 AM   #57
jleaman is offline jleaman  Belgium
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Quote:
Originally posted by Peter Daniel
I need to ask Veteran about progress, as he was developing software. The boards layout is completed, the only option might be different resistor choices.

On a control board therte is an option for source selector.

Right on thanks for the update peter.. Keep up the good work.

Jase
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Old 24th July 2006, 11:01 AM   #58
cliffforrest is offline cliffforrest  United Kingdom
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Default schematics?

I am probably being v. stupid, but I can't find any links to a schematic for this attenuator.

I can more or less work it out from the spreadsheet, but there must be an easier way?
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Old 31st July 2006, 06:58 PM   #59
cliffforrest is offline cliffforrest  United Kingdom
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In search of a perfect attenuator
Default Re: schematics?

Quote:
Originally posted by cliff
I am probably being v. stupid, but I can't find any links to a schematic for this attenuator.

I can more or less work it out from the spreadsheet, but there must be an easier way?
<fx: drums fingers on counter>

Anyone minding the store?

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Old 1st August 2006, 07:45 AM   #60
sonokeling is offline sonokeling  New Zealand
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Default stepped attenuator

I'd like to mention my experience with line signal attenuation. I'm not so familiar with the term shunt etc. So maybe this wheel reinvention, but here goes....
I've been looking at avoiding the resistor directly in the signal path, by draining the signal through the earth lead using a fixed resistor.
I've found that cheap carbon resistors work very nicely. The range is extremely limited, but I've found thatvalues between 4.7-6.8 ohm give good results with a variety of amps at home. I've got a Cyrus 1 which has direct input from the RCA's to the blocking capacitor on the main power amps with no resistor directly in signal. The resistor 'bleeds' the signal from this point to earth.
The sound is very stable and airy with low noise. Sorry for intruding on your discussion of esoterica!
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