AEG SE 6861/12 mod
SE 6861/12 mod
German military HF manpack transceiver AEG SE 6861/12 mod, build in the 80ies by Telefunken Systemtechnik - Deutsche Aerospace.
Technical manual (English) is No. 5X.0172.232.78
| Frequency | 1.5 MHz - 30 MHz |
| Transmission power | 2w or 20w |
| Modulation | J3E and A1A |
| Sideband | LSB and USB |
The transceiver is using very special connectors, left power connector MIL-C26482, right 2 audio connectors type NF07A1LO:
10 pin power connector according to standard MIL-C26482
| pin | |
| A | minus |
| B | minus |
| C | battery charging 21.5 - 32 VDC |
| D | external voltage source 22.5 - 38 VDC |
| E | external voltage source 22.5 - 38 VDC |
| F | |
| H | |
| J | battery charging 21.5 - 32 VDC |
| K | |
| O |
Audio connector type NF07A1LO from Schaltbau GmbH
| pin | |
| A | signal output 0 dBM/600 ohm |
| B | AF output 2.75V min 100 ohm |
| C | microphone |
| D | PTT |
| E | |
| F | microphone |
| G | chassis / ground |
The power supply is DIY, based on some cheap parts from ebay. The enclosure was from an unregulated old power supply from eastern Germany. Now it contains a toroid 230VAC-24VAC transformer, a huge heatsink and a regulated power supply with a 2N3055 and a LM337 transistor, adjusted on 24VDC. Max current is about 3A.
Power Supply 24VDC:
For audio-inout/-output I'm preparing an audio box, which allows the use of easy-to-get connectors, and also holding a small audio-amp for speaker output. Another feature is DSP noise reduction, the project can be found under this link:
Clearspeech audio line box