Allmode Receiver EKD 300 - VEB Funkwerk Köpenick

the schematics from the repair-instruction (servicemanual servicerecords) you find it at the end of this side




This receiver was built from 1984 as successors of the EKD 100 at the Funkwerk Köpenick.
Specifically there were the EKD 315 and EKD 316 as model with case.
There was furthermore the variations EKD 305, EKD 306 and EKD 325.
These models were conceived as build-in version. (EKD325 specifically for rack-mounting).


In the frequency area between 14 kHz and 30 MHz, you can receive the modes A1, A3, SSB, A4, F1 and F4.
Below also - from approximately 2 kHz - receiving is possible.



Technische data:

frequency range: 14 kHz to 29,99999 MHz

tune: in 10 Hz-steps, continous or input over key-field

build in F1-decoder: 100-800Hz Shift, up to 200Bd

preselection: through obligatorily with the frequency-tuning switched preselector (15 areas)

input impedance: 75 ohms

A1 pitches: 500 to 1200 Hz grade-free adjustable

F4 output signal: 1,9 kHz ± Hub/0dB

receive : A1 - 10µV /20 dBs from 14kHz to 150kHz, A1 - 1µV /20dB 150kHz to 30MHz / A3J 3µV / 20dB 0,15-30MHz

Spiegelfrequenzdämpfung: 80dB or better

ZF-Durchschlagsfestigkeit: 80dB or better

Intermodulationsdämpfung: with EMK-Stör until 10mV outside the usefulness-bond - 80dB or better

Intermodulationsdämpfung: with EMK-Nutz until 30mV within the usefulness-bond - 26dB or better

agc: 0,3s or 4s

IF-output 200 kHz, approximately 50mV at 50 ohms

AF output 0,5 W

telex output: 40mA ±10% simply-electricities

Power Input 50W

Voltage 127/220 V ~ network-business or 12/24V - / battery-business

wight 24 kg table-utensils / 18,5 kg build in version

BHT - 540 x 198 x 395 table-utensils / 530 x 168 x 353 build in version






complete overview of the keyfunctions and regulator-functions of the EKD 300 315 316 305 306 325:






1. inside-loudspeakers
2. connection-socket for outside-loudspeakers / tape or 2. headphones
3. connection-socket for tape or headphones
4. Speakerswitch
5. AF gain
6. spread-switches
7. regulation-switches
8. modeswitch
9. RF gain
10. Frequency-display
11. A1- tone
12. display: carrrier-synchronization
13. Control-switch
14. Control-instrument
15. switch: Power ON / OFF
16. Power LED
17. mounting screws
18. frontplate crews
19. grounding-screw
20. power-cable with plug
21. Battery-connection
22. Teleprinter-connection-socket
23. Socket-pairs: Electronic reception-barrier
24. Socket-pairs: AF- line output channel TF-A
25. Socket: ground-connection
26. Socket-pairs: AF line output channel TF-B
27. Socket: IF-output 200 kHz, approximately 100mV
28. Socket: AF output - 0,8V
29. Socket: antenna-input 75 ohms
30. plastic foots
31. screws
32. LED-line for F1-tuning
33. Zero-correction for control-instrument
34. Socket: +18V / 80mA for activantenna KAA1000
35. numeric field for frequency-input
36. reset switch for frequency input
37. ON / OFF for quasi-continuous frequency-tuning
38. quasi-continuous tuning knob



The service-friendliness of the receiver is great, you can see it here.
The entire front can be folded down - so approaches one at all modules comfortably:




the inside-lives can take out:




The 4 cassettes of the EKD300, to recognize good from the back, is.
you comprises the actual recipient.




The units are only put over contact-achieving and leaves itself
zur checkup easily takes out.




The almost unbeatable receiving-qualities results from the extremely clean construction.
Each cassette is shielded with silver-plated sheet metal - also the 4 modules per cassette among each other.

Here is the complete schematic from the original repair manual
(Servicemanual servicerecords) for free download