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GM3NKG Scotland flag Scotland

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  Elevation Hinge under construction          Linear Actuator and feedback pot fitted       H Frame X member in position

   

      EME Array 4X9 LFA            

                                         Here in central Scotland the winter wx conditions have proven the EME Array                                                                                to large an antenna load for the TENNAMAST.                                                                               

 An alternative antennas when the EME Array is down is an Interlaced               11 Element single feed Yagi for 6&4 Metres.  

This is a home brew to a design by GOKSC.  

 http://www.g0ksc.co.uk/lfa-fb-test/50-70mhz-11el-dualbander.html                                                                                                       

 

 

  The TENNAMAST also provides support for the 40,20 and 10M End fed.

 

 

 

 Azimuth and Elevation control for the Daiwa Rotator and Electric Linear Actuator is provided by a home brew controller.

The features built in as seen from the front panel controls are only a few of the features available from the software by K3NG

 

 

 

 

For EME and some of the Digital modes of operation frequency accuracy can be important.

This is my homebrew frequency standard built around a design and PCB available from VE3ZAZ

GPS Derived Frequency Standard  http://ve2zaz.net/GPS_Std/GPS_Std.htm                                                                                                       I also use this to provide a 10MHz reference for the main rig and some test equipment.    

    The GPS signal is fed from an external Trimble Antenna 

 

 
 
This 4 stage sequencer is built around the PCB available from W6PQL 
 
Passing the mic PTT via the sequencer prevents Tx RF out off sequence as would hapen with Mic connected direct to and operating main rig direct. 
 
A USB/RS232 adaptor was built in for lack of PC RS232 ports. Control from third party software now via USB.
 
USB/PTT LED is a dual LED  indicating usb or ptt status.

 

 

An old home brew linear amplifier for 6 or 4M but still capable of a comfortable 250 Watt ouput.

This build has two parallel amplifiers with inputs and outputs coupled via individual WILKINSON splitter and combiner on inputs and outputs.

The output device on each amp is an AD2931-10

The second amp on the opposite side is a mirror image of this side.

A bit labourious changing bands so a replacement Amp is under construction / consideration.

 

 

8553061 Last modified: 2018-01-02 09:55:47, 4712 bytes

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