Product Index

Bias Tee
Allows a DC supply current to be fed to the inner of a coaxial cable for remotely powered equipment.

Broadband Amplifier 1 GHz
This amplifier was designed as a quick solution for 'standing wave' measurements. It has turned out to be a most useful piece of equipment.

dc Block
A very basic piece of kit but essential in some situations, especially where test equipment inputs cannot handle a dc component.

FLEXI-BOX KIT
The FLEXI-BOX is now available with blank photo-resist coated PCB's  in the original size only.

HF Amplifier
This amplifier is designed to cover the HF band with the optimum performance. It also covers the LF and MF bands and could be most useful to radio hams.

Low Voltage Detector in a Micro Size FLEXI-BOX
Detects voltage from 0.3 MHz to 700 MHz at -30dBm to +10 dBm. New Product

RF Bridge
The RF Bridge is a directional device for splitting the forward and reverse components in a transmission line.

RF Trap
The RF Trap is mainly intended for use in the measurement of small harmonics in the presence of a large fundamental using a spectrum analyser.

RF Trap With Attenuators
The RF Trap With Attenuators is used for the same measurements as the RF Trap above and cannot produce a serious mismatch in either direction. 

Stub Filter
The stub filter can be used for the same tests with a spectrum analyzer as the RF Trap above.

Termination Box
This is intended to be a test aid and is also part of our Standing Wave Demonstration "Kit".

FLEXI-BOX Transmission Line Original size 63.5 mm long x 50 mm wide x 30.5 mm deep

Mini FLEXI-BOX Transmission Line 50 mm long x  35 mm wide x 23.5 mm deep.

Micro FLEXI-BOX Transmission Line 35 mm long x  35 mm wide x 23.5 mm deep.

 All of the transmission line boxes have a PCB with a 50 Ohm track running end to end. This is intended to be used to build surface mount circuitry by using a scalpel and a soldering iron to achieve the required layout .

VHF Broadband Amplifier in Mini FLEXI-BOX
Broadband amplifier designed as a test aid but equally suitable for a LF, MF, HF or VHF radio installation +10 dBm output.   New Product

VHF Broadband Amplifier in Original FLEXI-BOX
Broadband amplifier 3 MHz to 300 MHz +20 dBm output.   New Product

Voltage/Current Detector
Measures voltage and current in a coaxial cable from 0.3 MHz to 300 MHz. A unique and most useful product.

Voltage Detector in a Micro Size FLEXI-BOX
Detects voltage from 0.3 MHz to 300 MHz with up to 10 Watts input power. New Product 

6 dB Splitter
This is a resistive splitter which gives good phase matching and low amplitude ripple to 3 GHz using standard 0805 resistors.

500 MHz Broadband Amplifier in Mini FLEXI-BOX
Broadband amplifier designed as a test aid but equally suitable for a LF, MF, HF, VHF and some UHF radio installation as it covers the frequency range 0.3 MHz to 500 MHz.    New Product

A selection of low cost Radio Ham equipment is available from http://yb3didi.blogspot.com/ Don't worry about the language if you email Mr Supardi at yb3didi@gmail.com because he speaks good English.