HAM Radio Projects

Some of my electronic designs:

OrCAD 386+ files:

*.sch - schematic diagram

*.lib - components library

*.bd1 - PCB design

- Specially designed for EME activities. Moon tracking algorithm embedded.

- Useful also for satellites tracking and the usual VHF or HF traffic.

2. POWER SUPPLY 13.8V/30A for the HF transceivers using 4 x LT1083CP .

3. BEACON CONTROL MODULE with 2K EPROM memory

AQF.bin - EPROM example: (YO7AQF KN24KV 1W GP ANT BEACON -----)

4. TS870 MODIFICATION FOR TRANSVERTER

Disclaimer : I take NO responsibility or liability of any kind for any possible equipment damage or any other inconvenience

resulting from this modification. The user agrees to follow this modification on his own risk and expertise.

This modification was tested only on my TS870 transceiver and it is performing as is described hereinafter.

Two small PCB’s. One of them is fitted with a connector for transverter.

Appling 13.8V DC on VIN pin of this connector:

- RX pin will be connected to the internal RX line of transceiver.

- HF antenna will be disconnected from the internal RX line of transceiver.

- TX pin will have a low level RF signal from the internal TX line.

- PA input will be disconnected from the internal TX line.

- a 50 ohm resistor will be added to the PA input.

A new hole must be drilled on the rear panel of the TS870 transceiver ,between REMOTE connector and

EXT SP jack. (see the picture).

The relays are MEDER DIP05-1C90-51D type.