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Field Day--Class A Stations Jun 8th, 20:56 1 136 on 8/6/20
Antenna Modeling for Beginners Feb 8th 2013, 18:19 3 3,359 on 14/2/13
Roller Inductor Tuner Dec 20th 2011, 19:26 1 3,329 on 20/12/11
Using Ladder Line Jul 27th 2011, 19:43 3 4,877 on 29/7/11

Latest Posts

Topic Author Posted On
Best Material To Use For Mast? KB4QZC 3 weeks, 6 days ago
Don't forget that there are some NEC requirements for grounding your "antenna."
Field Day--Class A Stations WA0CBW on 8/6/20
Will the ARRL be taking Field Day contact scores for Class A Stations?
power for Kenwood TW-4000A KN6CWJ on 24/8/19
Simple answer is get a power supply that can deliver more current. It is generally a good idea to get one that provides a little overhead as in your case maybe 10 amps. Remember the radio will only draw as much current as it needs but the power supply has to have the capacity to deliver that amount. The power supply also has to be "regulated" meaning it keeps the voltage at a fixed value (13.8 volts) no matter how much current the radio draws. Just a reminder don't key the transmitter without connecting the proper antenna or a dummy load. Doing so can damage the transmitter.
power for Kenwood TW-4000A KN6CWJ on 22/8/19
Let's back up a bit. The radio requires a power supply of 13.8 volts at a current of up to 7.5 amps. On receive it will be less. The radio will draw only the amount of current it needs. On receive it may only need 1 or 2 amps but on transmit it may draw up to 7.5 amps as noted. What you need is a 12 volt power supply capable of delivering up to7.5 amps (or more) or whatever the radio needs. By the way they are typically called 12 volt even though they are voltage regulated at 12.6 to 13.8. The power supply will have a 120 volt AC cord that plugs into a regular outlet. It will have an output plus (+) and minus (-) connector.
Now 15 volts is probably nearing or over the limit of the radio so reduce the voltage to around 12 to 13.8 volts. The radio may only draw .4 amps on receive.
Hope that helps.
Filtering ac driveinman on 20/12/18
How do you know it is coming in on the AC line and not the antenna?

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