HI
We actually make a box that uses a SA housing and has a modem RF diplexer, and 2.4 GHz transmitter all running off the 60 AC line.. You can call me a 843-347-4933 or email at (-REDACTED-)
1. You cannot do what you want with a voltage divider. As soon as you connect the load you get a voltage drop across the upper resistor in the divider proportional to the amount of current drawn by the load. To drop 12 volts with a 2 amp load you need a 6 ohm 24 watt resistor. If either you modem or your transmitter is of the voltage will rise and the over voltage will probably blow the other unit. You can use a voltage regulator such as a dual 7812 to drop the voltage but you will generate heat which you will need to take into consideration. However at 2 amps you will be flirting with disaster using a brute force regulator and need to use a switching type regulator to accomplish what you need
2. The major component in the power supply that sets the output voltage is a custom transformer and without changing the transformer the voltage cannot be changed over about +/- 2 volts.
3. The modem also needs to be hardened for temperature or you may find it failing when cold or hot.
4. Call me and we can help you get to where you need to be
Re: Scientific Atlanta Power Supply Project... HE
Member #: 76883
Registered: 6/25/2010
Posted:
3
Name:
Steve Richey
Name:
Steve Richey
Company:
4Cable TV Inc
Occupation:
Design Engineer
Location:
Myrtle Beach SC
Personal:
late 70s
Experience:
~60 years
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