A very handy to use Content Management System is ONEPAGECMS. Used to update this web-page together with Snippetmaster.


Tube (PL519) power amplifier

PI4RAZ forum

Tube power amplifier (very compact) constructed by Lex PA0AXS. 3xPL509

No link yet, click on picture

Schematic << click here

One of the first articles ever of using low-cost switching FETs  in a RF power amplifier application.


Antenna simulation program what you can download for free.

Freeware antenna simulation

Receiver performance sorted by 2KHz IP3 dynamic range narrow space 2KHz:

Receiver performance sorted by blocking dynamic range 5KHz (ARRL method):

Multiband WebSDR receivers al over
Global Websdr

Web controlled short wave receivers:
Global SDR tuners, OpenWebRx

The RF bandwidth of a SSB 2.5KHz (speech audio) system is 7.5KHz
(for strong signals,coased by IM3) explained by W8JI:

Frits has a nice page with nice stuff:

And all the rest of Ham radio:

PHP scripts:
Password generator 1 and 2.
Calculator reken.

Other websites maintained by me:
Seniorenraad Waalre/
Local history
Eindhoven city Encyclopedia
Eindhoven Wiki

Links to friends: voor focustrainingen, psychologie, professionele aanpak
Marion van den Boogaard Nijmegen.