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überarbeitet am 30.12.2008
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Japan Radio Company already had got a very good reputation for their professional
maritime communications equipment when they entered the amateur radio market
1977 with a perfectly designed line of (semi)professional technology receivers in an
acceptable price range.
In the middle of the sixties, Japan Radio Company presented the NRD-1, and
a slightly downgraded twin, the NRD-2, two hollow state receivers with analog
linear dials, the NRD-10 series presented 1974 was transistorized and featured a digital
frequency display.
In parallel to the commercial double conversion receivers of the NRD-71 series,
the NRD-505 made it's appearence in 1977, this was the first of JRC's receivers
designed for the amateurradio market - it's price tag of 2250 US$ was a challenge
for the majority of the shortwave listeners. This receiver as well as it's very
popular successor NRD-515 could be operated
connected with a matching transmitter. There have bben quite expensive external
memory options and an external frequency input keypad, the later
NRD-525 appearing in 1986 had some 200 memories and
the frequency keypad already integrated. Because of it's competitive price,
it became a very popular set in Switzerland and I got used to find features like
passband tuning, notch fiter and a choice of IF bandwidths on a desktop receiver.
After the NRD-535, JRC presented it's first receiver
using digital signal processing (DSP) in 1998, the NRD-545.
The budget NRD-345 as entry to JRC gear was introduced in 1997, on the other side
of theprice range, the professional NRD-301A/302A receivers are not affordable
for most hobbyists.
Desktop Receivers
| NRD-1: triple conversion, 90 kHz - 30 MHz, linear
analog dial |
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| NRD-10: triple conversion, 100 kHz - 30 MHz,
digital frequency display, 16 memories, solid state |
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| NRD-1107 (1977):
double conversion, 1,6 - 25 MHz maritime bands, digital frequency display,
tuning with decadic knobs, AM, CW, SSB |
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| NRD-71: double conversion, 100 kHz - 30 MHz,
digital frequency display, memory option |
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| NRD-93: double conversion, 90 kHz - 30 MHz,
digital frequency display, 60 memories |
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| NRD-301A: double conversion, 90 kHz - 30 MHz,
digital frequency display, 300 memories, no keypad |
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| NRD-505 (1977):
double conversion, 100 kHz - 30 MHz, digital frequency display,
optional 4 memories, passender Sender NSD-500 |
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| NRD-515:
double conversion, 100 kHz - 34 MHz, digital frequency display,
PBT, optional 24 / 96 memories, external frequency keypad optional
matching transmitter NSD-515 |
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| NRD-525 (1996):
double conversion, 90 kHz - 34 MHz, digital frequency display, 200
memories, PBT, noise blanker, optional computer control board
& RTTY decoder |
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| NRD-535 (1991):
triple conversion, 100 kHz - 30 MHz, digital frequency display,
200 memories, PBT, noise blanker, ECSS, computer interface,
optional RTTY decoder |
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| NRD-545:
triple conversion, 100 kHz - 30 MHz, digital frequency display,
1000 memories, PBT, DSP, ECSS, computer interface,
integrated RTTY decoder |
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| NRD-345:
double conversion, 100 kHz - 30 MHz, digital frequency display,
100 memories, Noise Blanker, synchroneous detection, computer interface |
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