Day: August 22, 2013

VK3XDK PLL – for dual-band

August 22, 2013 Adam 0

I was looking into using a single VK3XDK PLL Synthesizer for both my 2.4GHz and 3.4GHz transverter systems.
ie; sharing the one PLL for both bands, with appropriate switching.

To expand on the general concept…

The trick is to use … Read more...

VK3XDK PLL – fitting an Si4133D

August 22, 2013 Adam 0

One thing that became apparent when using a single XDK PLL board in a dual-band 2.4/3.4 GHz transverter system, is that the PLL’s limitation on producing even MHz only, necessitates using different IFs.

For 2403, (1970 LO), a 433 MHz … Read more...

FT-817 +12V ACCessory Connector mod

August 22, 2013 Adam 0

This describes how to modify a Yaesu FT-817, so that the +12V appearing on the accessory connector switches on and off with the radio.

Normally, the +12V appears on the ACC connector when it has internal batteries fitted or DC … Read more...