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Field Day--Class A Stations Jun 8th, 20:56 1 248 on 8/6/20
Antenna Modeling for Beginners Feb 8th 2013, 18:19 3 3,441 on 14/2/13
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Latest Posts

Topic Author Posted On
adjusting SWR and hamsticks - help?? KM6SQB 2 weeks, 5 days ago
Are you using the metal bracket to mount the each leg? Are both legs isolated from the metal bracket? If only one leg is isolated try using a non-metalic mast 2 to 4 feet long to isolate the metal bracket from the metal mast.
Best Material To Use For Mast? kb4qzc on 9/7/20
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.

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