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Los Andes - July 2007

Hello dear colleagues as some know I hit him in the bulb to my brother Edward, he is CE2UIR to Winter Vacation expected in July, well here I put some memories with fellow hams in zone 2, especially Tito CE2PZJ, Carlos CD2551, great people and that is also Amateur Radio, to which I thank the opportunity gave me to participate in the anniversary of the CE2AND, Radio Club of Los Andes, when he turned 25 years of life, making me part of the CQ Contest RC, so I share great moments here in the installation of the RPT of the Andes in the -146,820 T100, working in perfect condition .-

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Goodbye Roe CE1GIB

Enrique R. Gallo Toledo.

CE1GIB

RIP

On September 28, 2007, ceased to be a Great Communicator of the Radio of our region, and perhaps the country, same thing I did not want to be oblivious to all this and take advantage of to pay a little tribute, so to speak, and give a few words with deep emotion to this friend Amateur Copiapina, with which I had the luck to have a couple of QSO share great moments in our Radio Club Copiapo, with nothing more to say hope you have best frequencies without QRM, and rest in peace, Don Enrique, soon, 73 .-

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Make you own Roe Meter

This is a very useful tool for adjusting the antennas and transmitters of low and medium power.
is ideal for the experimenter because it can work with RF levels as low as 10 mw. and can make measurements at frequencies up to 144 Mhz.

Figure 1

For sensitivity, the device uses a DC transistor amplifier with the amplifier can be easily obtained current gains up to 100 times.



How does

When J1 connects the end of the SWR meter to the transmitter, and the J2 end to the antenna, the RF current flowing through the central conductor L3, L1 induces a voltage directly proportional to the voltage on the line or conductor, L2 and a voltage proportional to the reverse voltage on same. The voltage detected by L1 is rectified by D1, and when SW1 is set to DIRECT, the rectified current is amplified by Q1 and indicated by the meter. When SW1 is in position reflected power, the voltage detected by L2 is rectified by D2 and turn amplified by Q1.

The meter reading gives a qualitative idea of \u200b\u200bthe RF power for a given control position sensivilidad R3, provided that it remains constant impedance load while making comparison.

The meter can be built for two different impedances, the impedance must be chosen to suit your needs, and according it using the impedance values \u200b\u200bgiven for R1 and R2.

As

weapon

This meter is built in a metal box (preferably aluminum) 6x6x12, 5 cm.
The transmission line section consists of an inner conductor (L3) and a piece of copper sheet gauge # 27 of 6x11 cm., Bending with the shape of the fig. 1, which form the outer conductor.

Figure 2

have to make two insulating supports (Fig. 2), or acrylic fiber serve to hold L1, L2 and L3 keeping the correct distance.

At the ends of the copper piece should glue the supports with a strong epoxy resin (with the holes made in advance with the measures Fig. 2).
When insulators are properly attached, we will hit the wires L1 and L2 acquisition and the central conductor L3, so that they protrude from insulators about 3 mm on each side to solder the resistors, diodes and coaxial connectors.
lands J1 and J2 should be well connected to the copper strip, as well as the DC amplifier.

The piece of copper must be connected to the metal box where the meter is assembled.
On the front panel mounted M1, SW1 and R3. Preferably M1 may be of the miniature.
J1 and J2 should be placed as close to the back of the box as possible.

In the protruding ends of 3 mm at L1 and L2 solder the resistors R1 and R2 and diodes D1 and D2 as close as possible to the insulation, then solder connections to the diodes short R4 and R5 and capacitors C1 and C2 . The other end of R4 and R5 can draw two wires that go to Sw1.

How

test

Connect the transmitter output to J1 using coaxial cable 50 or 75 ohms (as appropriate). J2 connect an antenna in phantom (resistance 50 or 75 ohms).
DIRECT With SW1 in position transmitter is turned on and calibrated R3 M1 full scale, is passed to REFLECTED SW1. The reading should be zero (0).

After this test, disconnect the antenna and connect the antenna ghost. Repeat with the antenna connected, with calibrated direct SW1 with R3 M1 deviation full scale, then with SW1 reflects back to pass and the scale reading is the reflected power or amount of stationary antenna is in .

These measures are qualitative, but if you want more precision can be gauged with the help of resistance or phantom loads. Example: with a resistance of 200 ohms have an ROE of 4 (200/50) with a resistance of 100 ohms SWR 2 (100 / 2), etc.

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Meter Amateur Radio Satellites use

SATELLITE AO-51

The reports for transmission to the Oscar 51 must have the following frequencies : First memory

Megahertz
145,915 145,920 + TONE Second memory 67 memory Third
Fourth
memory Megahertz 145,920 145,920 145,925 Megahertz Megahertz Memory
Fifth

memories for receiving the Oscar 51 must have the following frequencies:

First memory

435,310 435,305 Megahertz Megahertz

Second Third Memory memory Fourth
memory Megahertz 435,300 435,295 435,290 Megahertz Megahertz Memory
Fifth




SATELLITE AO-50

The reports for transmission to the Oscar 50 should have the following frequencies:

memory

145,845 First Second
memory Megahertz Megahertz WITH T 145,850 67.0 145,850 memory
Third Fourth
memory Megahertz Megahertz 145,850 Megahertz Memory Fifth
145,855

memories for receiving the Oscar 50 should have the following frequencies : First memory

436,810 436,805 Megahertz Megahertz Memory

Second Third Fourth
memory memory Megahertz 436,800 436,795 436,790 Megahertz Memory
Quinta Megahertz

Only transmit when it senses that the channel is free.

Before general call, make sure your receiver system to operate properly, because if you fail to receive probably will not hear the answer to your call and unnecessarily interfere with access to the satellite.

If you do not have preamp or antenna with rotor azimuth and elevation, open the squelch on your receiver, change the frequency by receiving their reports and find the memory where you get better, then put your memory in a similar position transmission. Make

called encoding your callsign in international code.

Be brief in your communications, to the possibility that other stations can use the satellite, since the duration of the past does not exceed 15 minutes.

If you are in Santiago or nearby you can use the satellite link AMSAT-CE, using the frequency +600 MegaHertz 147,150, with 67.0 Hz CTCSS
This can often find colleagues to help in the operation of this type and information of upcoming passes.



SATELLITE ARISS


basic rules for a good QSO with NA1SS

1. Make sure you have good frequencies up and down depending on your area of \u200b\u200bthe world. 145,800
down (hear) the same for everyone. 144,490
upstream (transmission) for the Americas, Asia and Australia145.200 rise (issue) for Europe and Africa

2. They do not call, you expect the astronaut do the CQ or QRZ say

3. Only responds to your call and is awaiting a response

4. Listen carefully to see if he calls you, if it does not transmit again until you call CQ or QRZ request.

Failure to follow these basic rules only get them tired of QRM and devote themselves to others.

For more information on satellites www.amsat.cl

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What is an Amateur?

An Amateur is someone natural that interest in radio and recreational spirit, study, experience and practice with radio equipment, planning activities to technological knowledge, cultural development, human relations, community aid and has been licensed in accordance with the requirements of Amateur Radio Service Regulations.

Amateur Radio Licenses will be the following classes:

• Superior Class (XQ)


• General Class (EC)


• Novice Class (CA) Class


• Applicant (CD)