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PROJECTS

A number of projects successfully completed and used extensively.


ALL BAND HF DIPOLE

The all band H.F. dipole is operated over the entire high frequency band (1.8 - 30MHz)

 

ALL BAND HF DIPOLE MK2

Improved All Band HF Doublet was constructed for operated over the entire high frequency band (1.8 - 30MHz)

ACTIVE ANTENNA - VERSION 1 

PA0RDT compact active wide-band receiving antenna for lower frequency bands from 10 kHz to approximately 10MHz.

 

ATTENUATOR - STANDARD 

40dB Standard Attenuator suitable for 0 - 30MHz.

 

ATTENUATOR - STEP 

Step Attenuator suitable for 0 - 30MHz.

 

BALUN 1:1 CHOKING

Choking balun for lower HF and MF bands. (200kHz - 10MHz).

 

BALUN 1:1 CURRENT

1:1 Guanella Current balun using a L15 ferrite core 

(1.8 - 30MHz).

 

BALUN 1:4 CURRENT

1:4 Guanella Current balun using a L15 ferrite core 

(1.8 - 30MHz).

 

BALUN 1:1 VOLTAGE

1:1 Ruthroff voltage balun using a T-200-2 powdered iron toroid core  (1.8 - 30MHz).

 

BALUN 4:1 VOLTAGE

4:1 Ruthroff voltage balun using a T-200-2 powdered iron toroid core  (1.8 - 30MHz).

 

BALUN 6:1 VOLTAGE

6:1 Voltage balun using a L15 ferrite toroid core  (1.8 - 30MHz).

 

BALUN 9:1 VOLTAGE

9:1 Voltage balun using a L15 ferrite toroid core  (1.8 - 30MHz).

 

CLOVER-LEAF ANTENNA - 146.5MHz.

146MHz 3 Petal Cloverleaf (Big Wheel) tower mounted antenna. 

 

CLOVER-LEAF ANTENNA - 435.0MHz.

435MHz 5 Petal Cloverleaf (Big Wheel) tower mounted antenna. 

 

DUAL BAND 40/15m DIPOLE 

Dual band dipole for 40m (7 - 7.3 MHz) and 15m (21 - 21.45MHz) bands. 

 

DUAL BAND J-POLE ANTENNA 

A dual band J pole antenna is operational over the entire 6Mtr band (50 - 54MHz) and the entire 2Mtr band (144 - 148MHz)

 

GROUND PLANE ANTENNA - 1λ4 - 14MHz

20m BAND (14MHz) 1/4 portable ground plane antenna. 

 

GROUND PLANE ANTENNA - 1λ/4 -146MHz

1/4 wave ground plane to be designed for approximately 146.5MHz.

 

GROUND PLANE ANTENNA - 5λ/8 - 146MHz

5λ/8 wave ground plane to be designed for approximately 146.5MHz.

 

GROUND PLANE ANTENNA - 435MHz

1λ/4 wave ground plane to be designed for 435MHz. 

 

HF TACTICAL BROADBAND ANTENNA

Fast deployable HF Tactical Broadband Antenna (2 - 30MHz)

Under development

 

LONG WIRE ANTENNA

Long wire antenna for portable operations. Under development

 

MASTHEAD COAX CABLE POWER FEED UNIT 

Masthead equipment coaxial cable 12v power feed unit.

 

PATCH ANTENNA FOR 436MHz

The patch antenna achieves outstanding results from what is an extremely compact antenna.

 

R.F. CURRENT METER

This R.F. current meter was developed to assist in measuring line currents in balance feed lines as used in the All Band HF Antenna.

 

RADIO SHACK CONSTRUCTION

Construction of the radio shack from 2008 to 2010

 

RADIO TOWER DESIGN 2010

Radio Tower Design and Construction 2010.

 

SOFTWARE DEFINED RADIO 

SDR using the Realtek RLT2832U USB Digital Terrestrial TV (DVB-T) tuner dongle to receive VHF/UHF (64~1700 MHz)

 

SOFTWARE DEFINED RADIO MF/HF UP CONVERTER 

0 - 50MHz spectrum up 100 - 150MHz converter to suit SDR using the Realtek (DVB-T) tuner dongle.

 

SKEW PLANAR WHEEL ANTENNA

Skew Planar Wheel Antenna for 435MHz.

 

SLOPER ANTENNA  -  10m BAND

Guy wire sloper antenna suitable for the 10m band.

 

SLOPER ANTENNA  -  40 & 15m BANDS

Guy wire sloper antenna suitable for both 40 and 15m bands.

 

SOUND CARD INTERFACE

Computer Sound-card Interface for TS-430S

 

SUPER J-POLE ANTENNA

The super J pole antenna is a co-linear vertical antenna for 435MHz.

 

T-MATCH ATU

1.8 - 30MHz antenna matching unit.

 

TRANSVERTER FOR THE 630 METER BAND

630M band (472kHz-479kHz) Transverter. Under development

 

TRAVELLING WAVE ANTENNA - VERSION#1

Multi-band Travelling Wave Antenna (TWA) for portable operations. Under development

 

TRAVELLING WAVE ANTENNA (2 - 30MHz) - VERSION#2

Multi-band HF Travelling Wave Dipole (2 - 30MHz) for portable operations. 

 

UNUN 9:1 VOLTAGE

9:1  voltage unun using a T-200-2 powdered iron toroid core 

(1.8 - 30MHz). 

 

UNUN 9:1 VOLTAGE VERSION 2

9:1  voltage unun using a L15 ferrite core (1.8 - 30MHz). 

 

VHF/UHF GENERIC ANTENNA MOUNT

VHF/UHF Generic Antenna Mount

 

Z-MATCH ATU

1.8 - 30MHz antenna matching unit.

 

 

 

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Page last revised 23 November 2016  
 

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