UPS for Kronos

[SanderXpander]

I use the one Francois posted the link about. Pretty happy with it except the mains lead half broke at the connection point to the box after about a week. It's been fine since though, I still have gotten around to fixing it.

[shaneblyth]

APC Smart UPS 450 - I power ALL my keyboards and rack devices from it.

I bought it because it is a rack mount and not an ugly floor box...and it fits in a rack!

http://www.amazon.co.uk/APC-SC450RMI1U- ... rt+UPS+450

Iraq did say?

[AntonySharmman]

A wish list for a future Kronos version (hardware, not software version):
Beefy power supply capacitors - not a UPS per se, but enough to last maybe 5 seconds...long enough to stay powered up though a glitch. To go along with that - if power drops, display immediately goes out until power is restored. That would conserve power and give indication there was a dropout.
Just a thought.

120 W SMPS of kronos uses 330-400μF/400V capacitor that is sufficient for 0.3 seconds of discontinued main power supply so
5 seconds of duration need a 6,8mF/400v capacitor that you do not want want to know the size/weight and cost of this component
not to mention the initial 20 Amperes of charging this capacitor , therefore this method doesn't seem to be proper at all !

Just to inform all of you that Kronos as your PC and the 90 % of your electronic keyboard equipment since 1990 work with DC voltage
at both initial and last stage , so the last thing to worry about is sinusoidal waveform of net AC power supply.
The main power supply module of all those equipments is called switching mode power supply which is a stabilizer itself working from 80 - 300 AC volts
regulating any AC waveform sinusoidal / triangle or square to DV voltage via extensive filtering , so no matter of kind of AC input , filter provides
pure DC high voltage to feed inverter to convert this high voltage via square waveform to required 3.3/5//12/-12 volts for Kronos mobo and rest circuits.
For instance an experienced user can feed AC power input of Kronos with 100 V DC to find out what I mean !

Only compressors , motors and old generation transformers require sinusoidal AC waveform of 50/60 Hz , and beware of those garbage triack
self transformers that waste power causing extensive electromagnetic force effects in our audio equipment !
Therefore our exclusive concern is to provide Kronos any power supply between 80 - 240 V AC or 100-400 V DC when discontinued net
power supply happens for more than 0.3 seconds and this can be achieved only by a ST/BY UPS acid battery device in order to provide
power during that instant or permanent net power loss.
As bottom line , any PC cheap battery UPS 150 W device is ideal for your Kronos !

Thanks for reading.

[danmusician]

A wish list for a future Kronos version (hardware, not software version):
Beefy power supply capacitors - not a UPS per se, but enough to last maybe 5 seconds...long enough to stay powered up though a glitch. To go along with that - if power drops, display immediately goes out until power is restored. That would conserve power and give indication there was a dropout.
Just a thought.

120 W SMPS of kronos uses 330-400μF/400V capacitor that is sufficient for 0.3 seconds of discontinued main power supply so
5 seconds of duration need a 6,8mF/400v capacitor that you do not want want to know the size/weight and cost of this component
not to mention the initial 20 Amperes of charging this capacitor , therefore this method doesn't seem to be proper at all !

Just to inform all of you that Kronos as your PC and the 90 % of your electronic keyboard equipment since 1990 work with DC voltage
at both initial and last stage , so the last thing to worry about is sinusoidal waveform of net AC power supply.
The main power supply module of all those equipments is called switching mode power supply which is a stabilizer itself working from 80 - 300 AC volts
regulating any AC waveform sinusoidal / triangle or square to DV voltage via extensive filtering , so no matter of kind of AC input , filter provides
pure DC high voltage to feed inverter to convert this high voltage via square waveform to required 3.3/5//12/-12 volts for Kronos mobo and rest circuits.
For instance an experienced user can feed AC power input of Kronos with 100 V DC to find out what I mean !

Only compressors , motors and old generation transformers require sinusoidal AC waveform of 50/60 Hz , and beware of those garbage triack
self transformers that waste power causing extensive electromagnetic force effects in our audio equipment !
Therefore our exclusive concern is to provide Kronos any power supply between 80 - 240 V AC or 100-400 V DC when discontinued net
power supply happens for more than 0.3 seconds and this can be achieved only by a ST/BY UPS acid battery device in order to provide
power during that instant or permanent net power loss.
As bottom line , any PC cheap battery UPS 150 W device is ideal for your Kronos !

Thanks for reading.

Thanks for taking the time to explain.

[Francois]

Antony makes a good point when it comes to the Kronos hardware. However, things are not always so clear cut. What you need to maximise and/or protect your gear also depends on your own home installation.

For example, in the previous house where I lived, the circuitry was old and there were all sorts of interferences and noise created, a real problem for audio quality. So besides a UPS system, all the problems I had with my instruments when it came to noise and interferences went away when I installed a line conditioner. Expensive piece of kit, around $750 at the time, but a God send. Suddenly, all electrical equipment I had in my music room benefited from getting a clear electrical signal. Huge difference!

Now, I'm in a relatively modern house and a UPS is all I need as the electrical installation works fine without giving interferences and extra noise.

[shaneblyth]

Antony makes a good point when it comes to the Kronos hardware. However, things are not always so clear cut. What you need to maximise and/or protect your gear also depends on your own home installation.

For example, in the previous house where I lived, the circuitry was old and there were all sorts of interferences and noise created, a real problem for audio quality. So besides a UPS system, all the problems I had with my instruments when it came to noise and interferences went away when I installed a line conditioner. Expensive piece of kit, around $750 at the time, but a God send. Suddenly, all electrical equipment I had in my music room benefited from getting a clear electrical signal. Huge difference!

Now, I'm in a relatively modern house and a UPS is all I need as the electrical installation works fine without giving interferences and extra noise.

and chances are the life of your equipment will be extended. Takes the stress off your gear. Playing gigs is a whole other world when it comes to power issues.

[AntonySharmman]

the circuitry was old and there were all sorts of interferences and noise created, a real problem for audio quality. So besides a UPS system, all the problems I had with my instruments when it came to noise and interferences went away when I installed a line conditioner.

Sonic noises and interferences are a different subject that you must take care independently of interactive UPS ,ask an electric engineer
for further details but briefly I'll let you know that even a UPS adds sonic interference to the existing one as every strong inductance load /
fluorescent lights/dimmers/ spread AM RF ect , that without the proper filtering circuits deform supply cosine waveform that pass through
your audio equipment via inductance with major stage/home problem the weak grounding !
In all that cases UPS/stabilizer or any similar device is insufficient to eliminate interferences that require over 3rd order AC filtering
(like your conditioner does) and definitely good grounding distribution !

Another note about the "life of your equipment" ... this is predefined since 2005 for every single part of it , with hours as metric unit !!!

[alanjpearson]

APC Smart UPS 450 - I power ALL my keyboards and rack devices from it.

I bought it because it is a rack mount and not an ugly floor box...and it fits in a rack!

http://www.amazon.co.uk/APC-SC450RMI1U- ... rt+UPS+450

Iraq did say?

I have no idea what that means...........

[shaneblyth]

APC Smart UPS 450 - I power ALL my keyboards and rack devices from it.

I bought it because it is a rack mount and not an ugly floor box...and it fits in a rack!

http://www.amazon.co.uk/APC-SC450RMI1U- ... rt+UPS+450

Iraq did say?

don't worry it was an eye rack/iraq rack mount pathetic pun
I have no idea what that means...........