I own a Ramsey FM 30 Stereo FM transmitter. I want to be able to take it out to a local football field and “broadcast” the football games of our local Christian high school to the folks in the football field area. Since there is no AC power available at this location, I need to know a simple way to hook up a battery or battery pack to the transmitter and a small mixer. Also, I may need a way to recharge the battery at home after the game. If anybody could offer any help with this problem and let me know where I might purchase what I need, I truly would appreciate it! Thanks! Ron King, Pres. First Love Christian Academy .
Portable Power
Hello Ron,
My suggestion for your unique situation would be a power inverter, a gel cell 12 v battery or heavy duty marine battery with the wing nut posts on top. I would go with the marine batter because most are deep cycle and are made to go long periods of time before they need charged again.
When choosing a power inverter you want to look at all the gear you will be using that would normally plug into a wall outlet and take note of the power requirements needed to operate each device..
Normally the tags can be found on the back or bottom of a mixer or in some cases you can find the power requirements on the walwart power supply. You should see the following: 12 vdc 100 ma 60 hz watts 100 etc.
You want to write those on paper and add the wattages up.
Kind of like this: device 1 @ 100 watts
device 2 @ 200 watts
= 300 watts (this is just an example)
here is a better explaination
http://www.wisegeek.com/what-is-a-power-inverter.htm
Now after taking note of the power requirements you will want to look at power inverters found usually at radio shack, auto parts stores or a big name hardware store. Try to get one that is well above the wattage you figured in your math above and make sure the inverter can be used for most devices. Some inverters put noise into audio devices and would cause you problems during a broadcast.
If your expecting sunlight during the games then maybe add a solar panel to back up the battery but it should be big enough to trickle charge that marine batter but small enough to be portable.
I am sure others have a much easier way to do this but what i suggest could be moved around on a dolly with little to no trouble.
Hope this helps
Inverter?
The inverter suggestion is good, you might be able to try a simpler solution first to see how you like it.
Since the Ramsey runs on 12 VDC and probably somewhere under 300 mA, I’m guessing the 12 V marine battery could probably do the trick by itself.
Consulting good old Wenzel’s handy web site’s battery capacity page, you might just pick up two 6V lantern batteries and run them in series to get 12 V.
These batteries have a capacity of about about 11,000 mAh and can deliver up to 300 mA to a device, so you could probably get several games out of one set of lantern batteries and go from there if you liked it.
12 Volt FM Transmitter and Battery Powered Mixer
Hi There:
The inverter idea is cool.
BUT if you decide to go with running just a straight
12 volt battery source for the transmitter, you are
still going to need to figure out how to power the
mixer. If you haven’t gotten a mixer yet, there are
some battery powered mixers that are available.
If you Google battery powered portable
audio mixers (or something like that) you will hopefully
find what you need. It sounds like fun. I hope it works
out for you.
Best Wishes,
Bruce, MICRO1690/1700
Behringer Xenyx 1002B
Here is a suggestion and i have heard good things about it.
Seems affordable as well.
http://www.behringer.com/EN/Products/1002B.aspx