Search This Blog

Monday, 28 September 2015

Nearly Done - Starter for 10GHz

Well,

The final parts have fallen into place today. Firstly I have adjusted the HB100 from the ARRL $25 10GHz signal generator I mentioned last time to be as close to 10.368 GHz as possible using the LNB range extender for the Spectrum Analyser (also from last time).

The metal case contains a grub like screw underneath a QC sticker. Here you can see the device with the QC sticker removed. As luck would have it the trimmer for the coils in the transverters fits perfectly - you just turn the screw to adjust the frequency:


The other thing I have done is construct an interface box for the FT-817 to:
  • Putting the 3cm transverter into TX by sending DC up the IF coax;
  • Providing a AFSK digital mode interface from my laptop;
  • Giving a CW keyboard capability.
Here's the schematic:



Please note that the 'DC up the coax' bits are entirely stolen from here: http://www.g3pho.org.uk/

The actual device looks like this:


and it interfaces to the FT-817 through the two rear sockets for ACC and PKT.

So all in all I think I now have a CW, SSB and digital mode capability on 10 GHz.


Local conditions.

No comments:

Post a Comment