m6ceb Ham Radio Station

Accessories



HAM RADIO ACCESSORIES

Power Supply Unit

The Power Supply Unit is needed for powering a transceiver that hasn't got a built in mains supply and for powering other station equipment that you may have in your shack. The Power Supply Unit needs to be able to provide a clean and stabilized 13.8 volt supply, a typical 100 watt transceiver would require around 20 Amps when operating at full power. I am a foundation licence holder and I am allowed 10 watts maximum power and my power supply pulls about 4 Amps.

I use a Palstar PS-30 30AMP max Power Supply Unit, it has short circuit protection and has an over current warning indicator, a steel case, precision ammeter and voltmeter so you can monitor what’s going on, thermostatically controlled fan, screw terminals and snap in terminals all located at the front of the unit. You can use a "switch mode" power supply unit but they can give an undesired noise when you are in a qso. Please check out my review of the power supply here.

supply

Palstar PS-30 25/30 amp PSU  (a.k.a.Manson EP-925)

SWR Meter

There are two main types of SWR Meter

I personally use the cross needle type SWR meter as it is very easy to see your forward and reflected power at the same time

swr

standard SWR meter

needle

Crossneedle SWR Meter

Dummy Load

A dummy Load is a very important item of amateur radio equipment it really is a "must have" It allows a range of tests to be carried out on your radio, such as checking modulation or deviation levels, without radiating an RF signal from the antenna. This avoids causing unnecessary interference to other users.

load

Headphones

headphones

This is useful for personal listening so as not to disturb other people. Headphones may also be helpful when trying to hear weak signals. 'Closed-back' headphones cut out more external noise than 'open-back' headphones. I use HiFi Headphones you don't need special amateur radio one's.

External speaker

external

Sometimes I have found that an internal speaker in a radio can be difficult to hear, this is due to the sound not being fully dispersed. My solution to this is to get an external speaker, this will improve the sound quality and volume as you can mount it closer to your ear.

Antenna Tuning Unit

atu

The Antenna Tuning Unit is a device that can be fitted in the feeder, typically at the transmitter end for convenience that can cope with power reflected by the antenna and allow the transmitter to send the power to the antenna and for the antenna to radiate it well. An ATU is quite widespread in HF installations, where a single antenna often has to be used for several bands due to space boundaries. The antenna will only match well on one band. All the others will be a compromise and an ATU will be needed for good results. Without an ATU, if the miss-match is severe, the transmitter could be damaged. Alternatively, protection devices in the transmitter will reduce or shut down the power. I prefer to use the term Antenna Matching Unit.

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Matt m6ceb

Website started  27/01/2010