ATV repeater Cologne, DB0KO
This repeater located in Cologne since 1980 (licence holder DF9KH)
had an FM-ATV output on 1280 MHz (only antenna and Sat-TV-Receiver attached
to any TV set needed). It was intended to be a "Multimedia" repeater from
the start, so besides the ATV inputs from 70 cm to 3 cm there were RTTY,
SSTV and FAX inputs on the 2 m band (not active any more). That needed
a complex control system working computerized.
Technical data DB0KO
QRV: 24h, beacon mode with computer testchart, cw call sign on
sound output every 10 minutes.
QTH locator was JO30LV (on top of bureau building "Deutsche Welle Radio") , end of 2003 dismantled and QRT!
antenna hight 142 m ASL, 91 m above ground
output: 1280 MHz FM-ATV, sound subc. 5,5 MHz WBFM
power: 25 W peak, antenna 4 x 4-fould resonance chamber, horizontal in
ATV input 1: 434,250 MHz horiz., AM-ATV VSB, sound subc. 5,5 MHz WBFM (sysop
ATV input 2: 1248 MHz vertical in 8 directions, FM-ATV, sound 5,5 MHz
ATV input 3: 2377 MHz horiz. in 8 directions, FM-ATV, sound 5,5 MHz
ATV input 4: 10420 MHz horiz., FM-ATV, sound 5,5 MHz
control input: 144,575 MHz vert., NBFM, for DTMF control and talkback
wheather satellite input: automatically repeated b/w pictures
23 cm ATV: DTMF #2x on 144,575 MHz (x depending on the own direction
i.e. 4 is west, 8 is south of the repeater - DTMF pad like a wind rose)
then DTMF 5 on the own ATV sound subcarrier, renew after 10 minutes
13 cm-ATV: DTMF #1x (then accordingly to above)
3 cm-ATV: DTMF 5 on sound subcarrier input
new functions 2000:
# * wheather picture for 4 min.
# 3 live tower camera for 1 min.
# 4 23cm-input for 2 min.
# 5 13cm-input for 2 min.
# 6 3 cm-input for 2 min.
# 7 DB0KWE on 10 GHz for 5 min.
# 8 4-fold picture splitter (pos. 2 - 5) for 5 min.
# 0 back to test image
Other details: Regular DARC bulletin on ATV (produced by local
radio amateurs) every sunday at 11 h MEZ, followed by amateur videos from
Transmitter, some control circuits and most receivers built or modified
by DF9KH; output antenna by DJ1KF(sk), 23 cm and 13 cm antennas
by DK3FF; some control electronics and testchart computer built
or modif. by DG2KR, DD7KQ, DF9KM, DJ7KN; wheather satellite converter
(FAXWERTER III) by DH4KAH;
English version by Klaus, DL4KCK
New QTH about 10 km south of Cologne is run by DG3KHS, details see http://www.db0ko.de
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