9V operation
Submitted by hamguy73 on July 17, 2008 - 19:46.
Have just ordered my kit, but, have read about powering it with 9V, insead of 12V.
My question is, does the filter draw little enough power, to make this practical? Don't want to be changing batteries every few hours of use.
Any help on this would be greatly appreciated.
Thanks and 73,
Bill, k6mgo
9V operation
Submitted by hamguy73 on July 17, 2008 - 20:54.
Thanks Bruce, I was afraid that the current draw was too much for a 9V battery to be practical. I'll stick with the 12V operation.
73/72 Bill, k6mgo
9V NEScaf operation
Submitted by N1RX on July 18, 2008 - 08:30.
Most commonly, we operate whatever radio we are using at nominal 12v power. Sometimes, the radio is made to operate on less, such as 6 AA cells in series (nominal 9v), or 3 Li-Poly cells (nominal 11.1) This is a situation when it may be useful to configure the NEScaf for a lower voltage supply.
Whenever we design something for be run from small batteries (vs a large Gell-Cell, for example) current consumption becomes an important design criteria.
GL es 73,
Bruce N1RX
9v operation
Although it is possible to run the NEScaf from a 9volt battery, I don't recommend it. As you suspected the issue is the current drain. Even driving headphones rather than a speaker, the current consumption is somewhere between 20 to 30 mA. This would run down a 9V battery pretty quick. (a few hours). Setting up the NEScaf to run from a lower voltage -can- be helpful, if you are integrating it into a rig.
73,
Bruce N1RX