Mod your Beresford 7520

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Originally Posted by HighFidelityGuy

Does anyone know how difficult it would be to mod the volume control on the 7520 to make it remote controllable? I guess the pot would need swapping for a motorised one plus I'd need an Ir receiver suitable for controlling the motorised pot, or something like that. Does anyone know of any suitable kit's or parts suitable for the job?

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I wonder if Stan is considering remote volume control for the “7530.” It is the first question asked of me by everyone after hearing my 7520!

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Originally Posted by ReachtheSky

I wonder if Stan is considering remote volume control for the “7530.” It is the first question raised by everyone after hearing the 7520!

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Everyone?

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Originally Posted by ReachtheSky

I wonder if Stan is considering remote volume control for the “7530.” It is the first question raised by everyone after hearing the 7520!

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Why:confused:? Unless a motorized volume control is used (very expensive), the signal would have to be adjusted through a digital IC. Anyone knows of a digital volume control that is transparent and doesn't degrade the audio signal?

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Originally Posted by Sensimilia

Why:confused:? Unless a motorized volume control is used (very expensive).........?

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I didn't realise the motorized volume controls were that expensive Stan. Shame because they are very convenient for some of us....have to put our glass down....

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Originally Posted by Sensimilia

Why:confused:? Unless a motorized volume control is used (very expensive), the signal would have to be adjusted through a digital IC. Anyone knows of a digital volume control that is transparent and doesn't degrade the audio signal?

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A lot of the digital potentiometers I've seen can only handle very small signals, may clip if on the output of an active out stage.
What about on the output of the dac before the active output?

I've not really tried any of these chips yet but it should be possible to try hardwiring something on vero and trying it out, see how it performs

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Originally Posted by leo

I've not really tried any of these chips yet but it should be possible to try hardwiring something on vero and trying it out, see how it performs

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It does what it says on the can. i.e. it works as a volume control.

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Originally Posted by Sensimilia

It does what it says on the can. i.e. it works as a volume control.

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I mean see how it compares sonically against a normal pot

http://www.maxim-ic.com/quick_view2.cfm/qv_pk/2778

Would this be a suitable motorised pot: LINK

It's a 20K log pot. I think the standard pot on the 7520 is 20K as it says 20K on the back but I don't know if it's log or linear.

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Originally Posted by HighFidelityGuy

Would this be a suitable motorised pot: LINK

It's a 20K log pot. I think the standard pot on the 7520 is 20K as it says 20K on the back but I don't know if it's log or linear.

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Those are quite big, with the control/receiver board its going to take quite a lot of space, I doubt very much it could be used in the existing sized 7520 case

Not that cheap either http://cgi.ebay.com/ws/eBayISAPI.dll...m=260388227348

Yeah, I thought they looked a bit big. I think it's mainly the width that will be the problem.

On a different subject; does anyone know what the maximum output voltage is on the fixed and variable outputs on the 7520?