Homemade AZ/EL Ratator controller.

I will design a AZ/EL rotator controoler to use for test communicate in moon bounce 。This design refer.../sv1bsx/actuator/actuator.html in first step.

This is design follow from web to pattern PCB. In actual I use universal PCB to make prototype. Then Pattern PCB evaluate from prototype.

In the box has a transformer. The transformer carrier out 4 Kind of voltage (33、24、12、and 6V）。　I use 33 and 24 to supplied the motor. And 12 DCV for supplied control board. Actuator need 33Vdc　to　supplied　and　Washer motor need 12Vdc to supplied.

The meter for indrcated portion of　antenna。I used 10mA meter and　modify　display　change the scale to AZ and EL degree meter.
Next step I modify actuator later.

ISS school contact

Hear the sound from International Space Station. Today ISS school contact's schedule to contact to school in Malaysia. I'm set up my shack to listen on 145.800MHz with Icom 2200-T and 2 x dipole antenna. And second mobile with Omni Antenna for spare. Use HRD satelite Tracking for monitor. and live steaming to my channel (see the recorded as below)
From ISS is very loud and clear but some station in my country make a noise. So It's very good to hear

Low noise amplifier

Now introduce a low noise amplifier is a project. The project build for operate in Earth-Moon-Earth mode. It's use MMIC for amplifier the weak signal. MAX2611 is my selection. This IC has gain ~18dB at 144 MHz. In circuit is a simple design follow as data-sheet. Using an capacitor to filter Input and Output signal as I need to amplify. Until I measure, I think to do the redesign a circuit again. When I finish hope a improve a received weak signal from the moon.

144/440 Antenna

The Home brew Antenna design by DK7ZB.
I made by 10mm. Aluminum tube.This is for starting to chat via satellite.

How to work amateur radio satellites with your handheld (HT) radio

This week I found the news for schedule of AO-51 the satellite. Then I search the detail for amateur radio satellites it has video show to how.


Oh! I and my friend E21QEB just to lean to play with amateur radio satellite.