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).

ALL BAND HF DIPOLE MK2 - ALTERNATIVE CONFIG

With a view to get better performance particularly on lower frequency bands, alternate configuration of the main HF All Band Doublet antenna. 

ALL BAND HF DIPOLE MK3

The All Band HF Doublet Mk3 is the same as the Mk2 version with the inclusion of a balun at the interface from the coax to the open wire feed-line. 

ACTIVE ANTENNA - VERSION 1 

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

ACTIVE ANTENNA - VERSION 2 

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

AMPLIFIER, BROADBAND 500kHz - 2GHz 

Construction of a Mini Kits GALI-74  Broadband Driver-a mp kit.

ATTENUATOR - STANDARD 

40dB Standard Attenuator suitable for 0 - 30MHz.

ATTENUATOR - STEP 

Step Attenuator suitable for 0 - 30MHz.

ANTENNA / RADIO SWITCH 

RF 3 position switch for either antenna switching or transceiver switching 0 - 150MHz.

ANTENNA / RADIO SWITCH - MK2

RF 3 position switch for either antenna switching or transceiver switching 0 - 150MHz. This unit has superior port isolation. 

BALUN 1:1 CHOKE & 1:4 STEP UP BALUN 

HF ladder feed-line to coaxial cable combination choke and 1:4 balun. (0.1MHz - 30MHz). 

BALUN 1:1 CHOKING

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

CHOKING 1:1 BALUN - HF BANDS

Reisert choking balun for HF and upper MF bands. (1.0MHz - 30MHz). FT240-43 Ferrite Toroid Core.

CHOKING 1:1 BALUN - HF BANDS

Reisert choking balun for HF and upper MF bands. (1.5MHz - 30MHz). FT140-43 Ferrite Toroid Core.

CHOKING 1:1 BALUN - LOW VHF BAND

Choking balun for upper HF to lower VHF bands. (10MHz - 60MHz). FT140-43 Ferrite Toroid Core.

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 1:4 SINGLE CORE CURRENT

1:4 Guanella Current Balun for HF and  MF bands using a single FT240-43 ferrite toroid cores. (0.3MHz - 30MHz). 

BALUN 1:1 VOLTAGE

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

BALUN 2.5:1 VOLTAGE

2.5:1 Voltage balun using a FT140-43 ferrite 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 - VERSION 1

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

BALUN 6:1 VOLTAGE - VERSION 2

6:1 Voltage balun using a FT140-43 Ferrite Toroid Core  (1.8 - 30MHz).

BALUN 9:1 VOLTAGE - VERSION 1

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

BALUN 9:1 VOLTAGE - VERSION 2

9:1 Voltage balun using a FT140-43 Ferrite Toroid Core  (0.5 - 60MHz).

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.

CLOVER-LEAF ANTENNA - 435.0MHz - MK2.

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

DC CABLE TO SUIT TYPICAL HF RADIO 

12Volt DC cable to suit radios with the 6 pin Molex plug

DC DISTRIBUTION BOARD 

12Volt DC Distribution Board using 30a Anderson connectors and including reverse polarity protection.

DC DISTRIBUTION BOARD FOR LOCAL REPEATER

12Volt DC Distribution Board for VK6RAV Repeater.

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 INVERTED L  PORTABLE ANTENNA

Fast deployable HF portable end fed inverted L antenna (1.8 - 54MHz).

HF TACTICAL BROADBAND ANTENNA

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

LONG WIRE ANTENNA

Long wire antenna for portable operations.  

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.

RINGO ANTENNA - 52MHz

Reworked old 2m band ringo antenna for the 6m band. Design and Construction 2019.

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.

TWIN-LEAD (LADDER LINE) FEED

Twin-lead feed ladder line replacement - September 2023

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). 

UNUN 9:1 VOLTAGE VERSION 3

9:1  voltage unun using a FT140-43 ferrite core (0.5 - 60MHz). 

YAGI UDA ANTENNA - 255MHZ - 5 ELEMENT

5 Element Yagi-Uda antenna for 250MHz to 260MHz.

YAGI UDA ANTENNA - 435MHZ - 6 ELEMENT

6 Element Yagi-Uda antenna for 430MHz to 440MHz.

YAGI_UDA ANTENNA - 435MHz - J_DRIVEN_ELEMENT

J Dipole driven element of half folded dipole as a substitute for a standard folded dipole on a 70cm Yagi antenna.

VHF/UHF GENERIC ANTENNA MOUNT

VHF/UHF Generic Antenna Mount. 

UHF MASTHEAD PREAMPLIFIER KIT FOR 70cm BAND

Construction of a 70cm band Mini Kits EME221-70CM pre-amp kit.

Z-MATCH ATU

1.8 - 30MHz antenna matching unit.