The Kitten HF Transceiver

The Kitten II Project - pictures of the internals.

The top of the transceiver. The front is at the bottom of the picture.

Top right is the Power Amplifier, mounted onn the rear panel with heatsinking bolted on. This is the Cirkit 20W PA.

In the centre of the rear panel is the power switching, TX/RX delay and protection circuit.

The modules are (Left to right):
Left - the IF amplifier with the two crystal filters
The RF board with transmit and receive mixers and top-coupled bandpass filtering for each of the 12 bands.
The Local Oscillator Synthesizer and the Multi-channel crystal oscillators for each band.

The bottom row are (left to right):
AF Filter (from Radcom)
AF amplifier (TDA1905)
Frequency counter
SSB and CW generator with a further 9MHz crystal filter.

The grey ribbon cable snaking its way up the right hand side and across under the MCXO, Synthesizer and RF boards is the channel switching. This also feeds the PA Bandpass Filtering underneath.

The inside of the Kitten II. Mouse over the picture to identify individual parts.

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	The underside showing the 5.0 to 5.5MHz VFO in the die cast box, with slow motion gearing. The main tuning know requires about 20 turns to tune 500kHz. The PCB module contains the PA bandpass elliptic filters. These are relay switched and grouped into 6 bands. The small PCB handles meter switching and shunts. Small Belling Lee coax connectors are used to route the RF around the chassis.
The underside of the Kitten II. Mouse over the picture to identify individual parts.	Return to 'Rigs' page.

The Cheriton - internals...

Here are a few pictures of the Cheriton 80m and 20m SSB / CW rig.

	PA and heatsink on the left hand side. The receiver board is the main PCB with the IF amp upper left and the RF section across the centre. The crystal filter can be seen mid left. The VFO is in the PCB box top right and the frequency counter is on top of it. At the bottom of the picture are the half wave filters to clean the output signal after power amplification.
Top view inside - It looks a mess but it was experimental - honest! Mouse over the picture to identify individual parts.	Return to 'Rigs' page.

	The transmit board (top) generates a 9MHz double sideband signal. This is passed through the crystal filter to remove the unwanted sideband and then mixed with the VFO signal. After bandpass filtering, the signal passes to the power amplifier and via the half wave filters, to the antenna.
Underside of the Cheriton. The mixer-VFO board below and the Transmit board above. Mouse over the picture to identify individual parts.	Return to 'Rigs' page.