Ham Radio-No repeaters?
Ham Radio-No repeaters? D-Star is one of the modern digital communications modes which are gaining pace in the Ham Radio world. Call routing GPS location and data transfer are three benefits to the new radio ham with an interest in digital communication. Ham radio is essentially about communicating with people and how this is achieved is a matter of choice for today's Ham community.
What is D-star?
When H.F. conditions are poor and Maximum Useable Frequency measurements do not allow traditional Radio signals to be propagated around the world, D-star or one of the other popular digital voice modes can make a significant difference to the keen radio ham who likes to converse, or as we say in the Ham Radio World, engage in a Q.S.O., which means to be in contact with.
How do you operate on D-Star when no local repeaters are within your vicinity. The answer to this problem is to secure a Digital Voice Access Point, or D.V.A.P.; this small device simply plugs into the USB port on your computer or laptop and allows any suitable D-star transceiver to connect to the International digital network.
There is now a more comprehensive digital access point, the open spot2, see above.
The D.V.A.P. is available on two meters or seventy centimeters and is essentially a low powered transceiver on either of these bands. The output of the device is around 10 milliwatts which are strong enough to allow connection from a hand-held transceiver to connect to and receive the digital signal. A USB lead is supplied together with instructions on how to download the software from the manufacturers website.
On one end of the D.V.A.P. an s.m.a. socket allows connection to a suitable Aerial, a stubby aerial is supplied but I have found connecting the device to an outside vertical improves not only the range it also allows for a more stable connection.
The D.V.A.P. was not designed to be plugged into an amplifier and looking at the spectrum of my model which is the two-meter version I have discovered that the low powered signal is not as clean as other low powered devices, however, it works very well and achieves its purpose which is to allow reflector operation and International communication where no D-Star repeater exists.
D-star has its place in today's Ham radio community; it is an effective communication system between continents and will probably improve as time moves forward.
I speak with several mobile stations in the U.S.A. On a regular basis and find the mode convenient to use while operating pedestrian mobile with my hand-held I-com ID-51-E transceiver. For those of you who no longer can erect aerials outside due to physical conditions, or due to problems of old age,
D-star and the D.V.A.P. gives you the opportunity to engage in Ham Radio communication which you may have enjoyed for a number of years using conventional multi-hop propagation via High-Frequency Ham bands.