Alles rund um Amateurfunk

General

For these hamware tuners I can offer an alternative firmware:

• hamware AT-502 (only for those with maximum values for TRX=255, L=63 and ANT=255)
• hamware AT-515
• hamware AT-615B
• hamware AT-615U

The firmware supports the "current" version of the tuners / controllers. Please check with me before ordering, if you own a very old tuner / controller.

This new firmware supports CAT control of the tuner via a simple interface and a modified firmware. Currently these transceivers are supported:

• Kenwood Protokoll
• ELECRAFT K2/K3/KX2/KX3
• ICOM CI-V
• TenTec Orion
• YAESU FT-847, FT-991A, FT-890, FTDX-5000

The new firmware listens to the CAT output from the transceiver. Based on the received VFO-A data, the related memory is selected automatically in the controller. Manual operation is still supported as with the stock hamware firmware. Frequency sniffing via the BNC socket in the controller is no longer supported.

Some transceivers (K3, KX2, KX3, ICOM) have the option to transmit the VFO data on each change on the physical knobs other transeivers must be triggered by i.e. a log application running on a attached PC. 

These manuals are available:  

• AT-502 (Deutsch)  AT-502 (English)
• AT-515 
• AT-615B

A simple interface can be found here.

Sourcing

Interface converter PCB €  5,-   6 available

Controller chip € 12,-

Shipping only to DL € 2,50

I offer the parts and shipping at cost price. If your're interested, simply Diese E-Mail-Adresse ist vor Spambots geschützt! Zur Anzeige muss JavaScript eingeschaltet sein! me via mail

All stuff about satellite communication

Here you can find all SDR related stuff.

You can listen to my web based SDR receiver here http://dl2sba.ddns.net:8073 

Further details yout this receiver can be found in these posts:

• 1st impressions
• Technical details
• Some SW stuff

Summits on the air

Funken mit kleiner Leistung

Weak Signal Propagation Reporter

For more information check out these webpages:

• https://de.wikipedia.org/wiki/Weak_Signal_Propagation_Reporter
• https://en.wikipedia.org/wiki/WSPR_(amateur_radio_software)
• https://physics.princeton.edu/pulsar/k1jt/wspr.html
• http://www.darc.de/der-club/distrikte/g/ortsverbaende/25/anleitungen-vortraege-projekte/schnelleinstieg-in-wspr/
• http://www.amateurfunk-wiki.de/index.php?title=WSPR
• http://wsprnet.org

Various impression from contests I've participated ...

Electronic stuff

Making printed circuit boards etc.

All about commercial and home-build measurement devices

To get into the story I recommend to read the following articles in this sequence:

• RF Powermeter - First steps
• RF Powermeter - Uploading HMI file
• RF Powermeter - Firmware 1.8.1
• RF Powermeter - Precision
• RF Powermeter - Calibration basics
• RF Powermeter - Unstable readings
• RF Powermeter - Unstable reading - Reloaded
• RF Powermeter - Updated display files