It's more difficult to calibrate, it fails often. No changes made. It's supposed to have lower distortion than sr2.
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I have now one fully assembled and operational VxD with SR3. It failed to calibrate on first attempt, but calibrated on 2nd with 50 volume steps. There is no volume bump in the middle like I have with other two setups with SR2. It seems that LDR resistance is more unstable at >500K range, but VxD is not operating in that area anyway afaik.
Hi all ,
there is any left board 2 or 3 inputs to 1 or 2 outputs for Latching relays AGQ21012
BR Nikos
there is any left board 2 or 3 inputs to 1 or 2 outputs for Latching relays AGQ21012
BR Nikos
I have few left, 4in 2out, single ended. See my earlier post for photo.
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I can hear it with white noise easily. Didn't try the scope, but it will probably show there too. I don't hear it with SR3 LDRs.
From first page of this thread:
"- the LDR LEDs are working at low current (7 mA maximum), they will last a very long time"
So at the max current, there is negligible difference in resistance between the two, typically around 40 ohm. But the difference in distortion is negligible too, I agree.
There is no volume "bump" however with two SR3 builds I completed. Both SR2 builds I've done have it.
Not big enough sample for conclusion though.
But can you get down to 40ohms with just 7mA, I think not
My prototype has been on now 24/7 for over 10 years now with a max of 20mA, and is as a good today as it was 10 years ago, never even needing to be re-calibrated. So Silonex were correct, in giving them a safe operating 20mA current limit. But I do say in the instructions if not being used and left powered up, leave the volume at half, this way they only get 10mA
The volume "bump" in the sr2s is utilized with me as it mimics almost the volume progression of a logarithmic pot.
As the way it is, it has very slow progression from zero to around 1.30 to 2 o'clock then increases quite fast to full, just like a logarithmic pot does.
Cheers George
My prototype has been on now 24/7 for over 10 years now with a max of 20mA, and is as a good today as it was 10 years ago, never even needing to be re-calibrated. So Silonex were correct, in giving them a safe operating 20mA current limit. But I do say in the instructions if not being used and left powered up, leave the volume at half, this way they only get 10mA
The volume "bump" in the sr2s is utilized with me as it mimics almost the volume progression of a logarithmic pot.
As the way it is, it has very slow progression from zero to around 1.30 to 2 o'clock then increases quite fast to full, just like a logarithmic pot does.
Cheers George
George, I am not absolutely sure but I think the design yields about 150ohm shunt @ 7ma. At low volumes the series ldr resistance is additionally increased to still enable reasonable attenuation with 150 ohm shunt. In other words the design does not resemble a nominal ~10K (or whatever you nominate in the software) pot in these situations (more like 50k+).
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