GM4JJJ's 144MHz DX Tips

GM4JJJ's 144MHz DX Tips
Based on my experience of DXing on 144MHz from Scotland


Sporadic E causes

A few things that can also trigger 144Mhz Sporadic E: Read More...

Modifying the Adret 5104 Frequency Synthesiser for 10MHz external reference.

The Adret 5104 is originally designed to be able to use a 5MHz external frequency standard.
With the availability of GPS conditioned 10MHz frequency standards such as the HP Z3801A it is more useful to be able to feed 10MHz into the Adret 5104 and lock to that rather than 5MHz.

This paper shows a method of modifying the Adret 5104 to accept a 10MHz reference rather than 5MHz.

Poet's corner

Yesterday (with apologies to Lennon & McCartney)

Yesterday, all those backups seemed a waste of pay.
Now my database has gone away.
Oh! I believe in yesterday.

Suddenly, there's not half the files there used to be
And there's a millstone hanging over me.
The system crashed so suddenly.

I pushed something wrong,
What it was I could not say.
Now my data's gone
And I long for yesterday.

Yesterday 24 backups seemed so far away.
I knew my data base was here to stay.
Now I believe in yesterday.