lagoausente
Well-known member
Consider a comercial mic preamp with 220 V input.
In my mind I think about this posibilities to run from NIMH battery.
1) just a 12 to 220 V pure sine wave inverter. It´s logical but I think it will waste much energy converting from DC to 220 AC, and then again to +/- DC. Think on the heat will waste just the preamp transfomer..
2) The preamp has inside +/- 18 v. Could take 15 batteries of 1.2 volt and 2600 mah for the +18 and another 15 for the -18. Here my doubt is that when full charged, the batteries have 1.4 volt each, so I would have then 1,4x 15= 21V. And so +/- 21 volt. I don´t know if the preamp stabilization would allow this variation from +/-18 to +/-21..
3) Take a inverter, but instead of going to 220 AC, modify it to give me 18AC, and so go directly to the rectifier section avoiding the main transformer of the preamp. Maybe could waste less energy this way?
I would like to know your opinions.
In my mind I think about this posibilities to run from NIMH battery.
1) just a 12 to 220 V pure sine wave inverter. It´s logical but I think it will waste much energy converting from DC to 220 AC, and then again to +/- DC. Think on the heat will waste just the preamp transfomer..
2) The preamp has inside +/- 18 v. Could take 15 batteries of 1.2 volt and 2600 mah for the +18 and another 15 for the -18. Here my doubt is that when full charged, the batteries have 1.4 volt each, so I would have then 1,4x 15= 21V. And so +/- 21 volt. I don´t know if the preamp stabilization would allow this variation from +/-18 to +/-21..
3) Take a inverter, but instead of going to 220 AC, modify it to give me 18AC, and so go directly to the rectifier section avoiding the main transformer of the preamp. Maybe could waste less energy this way?
I would like to know your opinions.
