당신은 주제를 찾고 있습니까 “jrc nrd 515 – JRC NRD-515 All Wave Receiver“? 다음 카테고리의 웹사이트 https://chewathai27.com/you 에서 귀하의 모든 질문에 답변해 드립니다: https://chewathai27.com/you/blog. 바로 아래에서 답을 찾을 수 있습니다. 작성자 Eric Dobrowansky 이(가) 작성한 기사에는 조회수 5,656회 및 좋아요 32개 개의 좋아요가 있습니다.
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Reviews For: JRC NRD-515 – eHam.net
The NRD-515 is by far the best receiver for working MW DX’ing that I have ever owned. … The VFO is super smooth, The Filters (including the optional 600Hz) are …
Source: www.eham.net
Date Published: 2/16/2022
View: 1231
주제와 관련된 이미지 jrc nrd 515
주제와 관련된 더 많은 사진을 참조하십시오 JRC NRD-515 All Wave Receiver. 댓글에서 더 많은 관련 이미지를 보거나 필요한 경우 더 많은 관련 기사를 볼 수 있습니다.
주제에 대한 기사 평가 jrc nrd 515
- Author: Eric Dobrowansky
- Views: 조회수 5,656회
- Likes: 좋아요 32개
- Date Published: 2017. 7. 24.
- Video Url link: https://www.youtube.com/watch?v=bKY6r73FFxc
JRC NRD-515 HF Communications Receiver for sale online
Pre-owned: Lowest price The lowest-priced item that has been used or worn previously.The item may have some signs of cosmetic wear, but is fully operational and functions as intended. This item may be a floor model or store return that has been used.See details for description of any imperfections.
Approx. 5,231,395.35 VND + 1,947,674.42 VND Shipping US $224.95
Get it by Mon, Aug 8 – Fri, Aug 19 from Mill Hall, Pennsylvania • Used condition
condition • No returns, but backed by eBay Money back guarantee eBay Money back guarantee
Japan Radio Company JRC NRD-515, JRC NRD515
The Japan Radio Company NRD-515 has earned a reputation for outstanding quality and unexcelled performance. This radio covers 100 kHz to 30 MHz in RTTY, CW, USB, LSB and AM modes. It is the unchallenged favorite for RTTY/FAX reception, coming from the marine radio tradition for which JRC is famous. A digital VFO with with phase lock loop synthesizer, combined with a photo-type rotary encoder results in tuning totally free of backlash, reading error and secular variation. The up-conversion double superheterodyne circuit virtually eliminates images. Frequency selection is very intuitive. Just select the desired MHz. and then tune the main tuning knob or rapid up-down switch. Effective passband tuning is provided to eliminate adjacent channel interference during CW/SSB reception. Selectivity can be selected independent of mode. A 6.0 and 2.4 kHz filters are provided as well as two additional slots for optional filters. Other refinements include: Attenuator, Delta (Fine) Tuning, S-Meter, Noise Blanker and External VFO. The rear panel has antenna input and speaker output jacks as well as a connector for the optional memory or keypad. This radio requires a speaker such as the optional NVA-515. Optional NDH-515 and NDH-518 external memories were offered. JRC eventually also produced the NCM-515 wired frequency controller. The NRD-515 was an affordable follow up to the NRD-505 and a perfect mate for the matching NSD-515 transmitter.
Accessories Order # Item Description Price Order CFL-218 This 1800 Hz filter is for SSB and wide shifted 850 Hz RTTY. Discontinued CFL-230 This 300 Hz filter is great for narrow CW or 170Hz shifted RTTY. Discontinued CFL-260 This 600 Hz filter is great for CW or narrow shifted RTTY. Discontinued MPPC07961 Daughter board for two filters. INFO Discontinued NCM-515 Wired keypad frequency controller with four memories. INFO Discontinued NDH-515 External memory unit – 24 channel. INFO Discontinued NDH-518 External memory unit – 96 channel. INFO Discontinued NVA-515 Matching external speaker with audio cable. 4 ohm. INFO Discontinued ST-3 Deluxe monaural communications headphones. INFO Discontinued OM NRD515 Printed Owner’s Manual. Discontinued SM NRD515 Printed Service Manual. Discontinued #1670 SMC NRD515 CD Service Manual on a CD (in PDF format). $15.00 SPARES Spare parts kit. INFO Discontinued
Second Hand JRC NRD-515 HF Communications Receiver
The Japan Radio Company NRD-515 has earned a reputation for outstanding quality and unexcelled performance. This radio covers 100 kHz to 30 MHz in RTTY, CW, USB, LSB and AM modes. It is the unchallenged favorite for RTTY/FAX reception, coming from the marine radio tradition for which JRC is famous. A digital VFO with with phase lock loop synthesizer, combined with a photo-type rotary encoder results in tuning totally free of backlash, reading error and secular variation. The up-conversion double superheterodyne circuit virtually eliminates images. Frequency selection is very intuitive. Just select the desired MHz. and then tune the main tuning knob or rapid up-down switch. Effective passband tuning is provided to eliminate adjacent channel interference during CW/SSB reception. Selectivity can be selected independent of mode. A 6.0 and 2.4 kHz filters are provided as well as two additional slots for optional filters. Other refinements include: Attenuator, Delta (Fine) Tuning, S-Meter, Noise Blanker and External VFO. The rear panel has antenna input and speaker output jacks as well as a connector for the optional memory or keypad. This radio requires a speaker such as the optional NVA-515. Optional NDH-515 and NDH-518 external memories were offered. JRC eventually also produced the NCM-515 wired frequency controller. The NRD-515 was an affordable follow up to the NRD-505 and a perfect mate for the matching NSD-515 transmitter.
NRD-515 Specifications
Frequency Range …… 100 – 30000 kHz
Power ……………. 100/117/220/240 VAC 50/60 Hz 50VA max.
Antenna Impedance …. 50 to 75 ohm
Selectivity (-6dB) …
6 > 6 kHz
2.4 > 2.4 kHz
0.6 > optional 0.6
AUX > optional
Sensitivity ……… 0.5 µV 1.6-30 MHz SSB/CW S+N/N=10dB
Image Rejection …… > 70 dB (1.6 – 30 MHz)
IF Rejection ……… > 70 dB (1.6 – 30 MHz)
Frequency Accuracy … ± 10 x 10-6 or better.
Frequency Stability .. ± 50Hz per hour after 1 hour.
Intermediate Freqs. .. 1st IF = 70.455 MHz
2nd IF = 455 kHz
Audio Output ……… 1 W at 4 Ohms
Line-Record Output … > 1mW at 600 Ohms
Dimensions ……….. 13.5 x 5.5 x 11.8 inches. 340 x 140 x 300 mm
Weight …………… 20 Lbs. (7.5 kg)
eHam.net
G7NKS Rating: 2015-08-11 Awesome Time Owned: more than 12 months. I have collected 3 of these fabulous sets over the past few years. I also have 3 of the memory units and 2 of the remote keypads. The double adaptors are very hard to find. The mechanical filters do fail and need cleaning/restoring which is a fiddly hard job, but doable. They hold their value and when you have one you will understand why. If you like HF Dxing or SWLing then these are a class apart.
ZL1LK Rating: 2015-04-05 OUTSTANDING!!! Time Owned: 3 to 6 months. I managed to purchase a mint condition 515 with the matching speaker and memory unit all with original cartons and manuals. Well if that’s not enough to impress me, I connected it all up and WOW! It holds it own in my radio shack. I put it up against my FTdx1200, TS480 and my AOR AR-5000. I thought my FTdx1200 was untouchable. I found the 515 on SSB could pull out weak signal as the 1200 could but the 515 just made it that more pleasurable on the ears.
The NRD-515 is by far the best receiver for working MW DX’ing that I have ever owned.
Likes:
Built like a battle ship,
Positive felling controls (still after 30 years)
The VFO is super smooth,
The Filters (including the optional 600Hz) are outstanding,
Excellent audio with its NVA-515 speaker,
Dislikes:
After leaving the radio off for a few minutes in the VFO mode, the kHz reset to 000.0 (I’m not too sure if this is normal even with the NDH-515 memory unit attached?)
Overall I would give it a 10 if I could so I will have to settle for a 5.
73 Roy ZL1LK
KB8E Rating: 2013-10-22 Very good receiver with a few flaws Time Owned: 6 to 12 months. I really wanted to give this fine receiver five stars and keep its perfect rating going. However, after working on and upgrading a number of samples, I’ve discovered a few flaws that prevent me from giving it a perfect rating.
The biggest issue I’ve run across is that the IF filters are not matched properly. The first IF filter at 70.455 MHz has about 3 dB or more ripple and is mismatched at the first mixer side. A shunt resistor on its input to ground solves the problem, albeit with a slight reduction in sensitivity. All of the 455 kHz second IF filters are mismatched as well. I’ve replaced the IF matching networks to get a perfect response out of all of the second IF filters from the stock 6 kHz, 2.4 kHz, and 600 Hz filters as well as an Inrad 400 Hz wide filter. Plan on opening up and cleaning any stock mechanical filter in the unit, the internal foam gets gummed up and must be cleaned out for anything close to good performance. This is not a particularly difficult task and instructions can be found on the web.
The good news is that this receiver holds its own against the competition, even today. The synthesizer is complicated, but effective, although the 100 Hz tuning steps are a little coarse. The sensitivity is good and I’ve yet to note any overload or intermod issues. The service manual is quite good and the receiver is fairly easy to work on. The controls and display are intuitive and very straightforward.
Removing the front-end protection diodes is recommended to improve IMD performance. I replaced mine with a high value resistor in shunt with a neon bulb. I’ve also had a sample with sticking front-end routing relays, but I suspect that was an anomaly (replacement relays are expensive!). Other issues I’ve run across include an off-frequency 70 MHz oscillator and a defective 5-volt regulator. Not particularly unusual for a radio of this vintage. Don’t pass up a good unit, but be prepared for some work, especially in the stock mechanical filters. The mismatched filters don’t ruin its performance, its just not as good as it could be. Overall, this receiver is a favorite of mine.
WR3KI Rating: 2013-10-04 Magical receiver Time Owned: 3 to 6 months. I’ve wanted this rig for years & recently picked one up at a good price. Minty condition. Now I know why they don’t come on the market often & have a cult like following.
I did some A – B tests, my Yaesu FTDX-5K vs the 515 & was impressed. The JRC copied weak dx like the 5K, BUT I could make out what was being said on SSB just a bit better on the 515. The JRC is just a quieter rig than the 5K. Not bad for a 30 plus year old rig.
Anyway, if you can find one, buy it.
If you are a career SWL or dx’er, you won’t be disappointed.
ZS6DJD Rating: 2011-07-21 A very very good general coverage HF reciever. Time Owned: more than 12 months. This such good reciever I am not sure what to say. But this radio recieves so well you will hear most everything on good old shortwave radio.one of the best ever made. I still use mine today listen to some local stations on short wave in Southern Africa and I have picked up some stations from half way arround the world.
W1BR Rating: 2010-08-09 Can’t say enough good about it! Time Owned: more than 12 months. I’ve owned the JRC NSD-515 and NRD-515 transmitter and receiver twins for over 20 years. The only rigs of similar quality that I could compare them to is my earlier Collins S Line station. These JRC products exude quality. The case and panel are all metal construction, the PC boards are quality glass epoxy, and the engineering is first rate. They have been extremely reliable and have required very little maintainance. The receiver’s mechanical filters failed as a result of foam rubber material breaking down into a gooey, lossy mass; this required that the filters be opened to replace the foam shock mounting.
The only drawback with the receiver is the 100Hz tuning steps resolution of the main tuning encoder, the operator must use a separate fine tune control for precise tuning on SSB or CW. But, that is part and parcel of the design limitations of the day. Both units have been flawless, except for the damaged PA transistors in the transmitter when purchased (the rig was used in field day envirnments previously.) Unfortunately these are the last of a breed, since no manufacturer currently offers discrete RX and TX packages. The transmitter features true RF clipping, but I digress. These will be the last HF radios that I will ever need.
VR2XMQ Rating: 2009-09-17 Best receiver I have owned Time Owned: 0 to 3 months. Without a doubt this is the best receiver I have owned. I was fortunate enough to find one with a matching NDH-518 memory unit in stunning mint condition, it looks absolutely brand new.
The general feel and performance of this radio is absolutely top notch and it will be a keeper for me. People complain about the AM audio, but I have found with the JRC NVA-319 external speaker that it is quite acceptable.
If you see one in good condition, DO NOT PASS UP THE CHANCE of owning it, you will regret it! They are still expensive second hand but are worth every single penny.
Steve, VR2XMQ
KE5CBG Rating: 2009-08-11 FANTASTIC Time Owned: 6 to 12 months. A FINE RADIO. I WAS A LITTLE DISAPOINTED AT FIRST, HOWEVER, WHEN I GOT USED TO ITS CONTROLS IT WAS GREAT.VERY WELL MADE,SELECTIVE,SENSITIVE AND WELL PLACED CONTROLS.FOR ADVISE ON THE “WOOLEY AUDIO”,THE RADIO WAS SENT TO SHERWOOD LABS FOR FILTER CHANGES AND CIRCUIT MODIFICATIONS. THE END RESULT WAS SIMPLY OUTSTANDING. I ALSO INTERFACED A SE-3 SYNCHRONOUS DETECTOR.IT TRANSFORMED THIS RADIO INTO A DXING MACHINE.IF YOU CAN FIND ONE THESE RADIOS IN GOOD CONDITION GET IT AND YOU WONT BE SORRY
TDLS Rating: 2008-11-17 A great receiver Time Owned: 3 to 6 months. A great receiver.
Very quit and very sturdy.
When warmed up (after 15 minutes) it gets more sensitive and quieter, just like a class A amplifier.
Don’t use it with the original speaker; use a small hi-fi speaker.
Bought it on Ebay with the NDH-518 memory unit for 800 Euro and I don’t feel sorry!
No modern gizmo’s like sound processing.
Very easy to understand; in one week u know all the bells and whistles.
I live in the center of the Hague, the Netherlands and use this rig with a Wellbrook 1530+; the ideal combination!
If they were made new u would pay at least 1600 Euro for this receiver.
My short review, sorry for the bad English.
NRD-515 Amateur-R JRC Japan Radio Co., Ltd.; Tokyo, build 1979–
Here you find 37 models, 32 with images and 8 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
All listed radios etc. from JRC Japan Radio Co., Ltd.; Tokyo
The SWLing Post
Many thanks to SWLing Post contributor, Dan Robinson, who shares the following guest post:
ICOM’s IC-R8600: Can this mega-radio stay in the ring with big gun “legacy” receivers when it comes to shortwave band reception?
by Dan Robinson
When ICOM rolled out its new wideband receiver, the IC-R8600, I immediately took an interest in it. I have been primarily a hardcore DX’er and SWL and avoided purchasing wideband receivers, including the predecessor IC-R8500, because they were limited in areas such as selectivity.
My experience with ICOM includes owning a IC-R71A and R72, both of which I found to be strong performers, as well as a IC-R75. The R75 as everyone knows established a reputation as an excellent receiver that delivered bang for the buck, including for example 1hz readout and extreme stability.
In its design decisions with the 8600, ICOM clearly intended to hit it out of the park, taking a huge step from the 8500. That can be seen in the amazing color 4.3 inch LCD display with fairly fast spectrum scope and waterfall displays, coverage from 10 kHz to 3 gHz, decoding capability in multiple protocols, (Baudot RTTY, D-STAR™, NXDN™, dPMR™, DCR (Digital Communication Radio) and APCO P25, and the combination of SDR and superheterodyne circuitry, with 2000 memories.
At this point, there have been numerous reviews of the 8600, and videos are all over YouTube showing the basics of its operation and features. It has numerous flexibilities selected from the front panel and within the menu system. The ability to record directly to SDHC cards eliminates the need to attach an external solid state recorder (over the course of my DX career I accumulated many of these). I can’t say enough about this capability which automatically keeps fully labeled logs.
Other features include ICOM’s wonderful Twin Passband Tuning, combined with the ability to adjust filters 1/2/3, adjustable attenuation, Digital AFC, tone controls, noise blanker digital noise reduction, speech enunciator, main tuning dial tension adjustment, synchronous L/U/Double sideband, adjustable panel brightness . . . in short, just about everything one would think should be included in a 21st century receiver of this kind, ICOM put in the 8600. The firmware update released recently (1.30) added the capability to use the radio’s IQ output with HDSDR software, which means that the receiver is now not only a standalone but also functions easily with a PC.
Since the 8600 has been on the market for some time now, I discussed with Thomas Witherspoon of SWLing Post, the idea of obtaining an 8600 for the specific purpose of comparing it to some of the top receivers in my collection.
At the current time, that list includes a JRC NRD-545, the Drake R-8 (original version purchased in 1993), JRC NRD-515, Watkins Johnson 8718A/MFP, Cubic R-2411, and a McKay Dymek DR-33C. All of the radios in my shack use a Wellbrook 1530 loop, fed through a RF Systems DA-8 Distributor/Amplifier which maintains signal levels from all outputs.
A surprising outcome of my comparisons of the 8600 to these radios is that my appreciation of the qualities of these older receivers was actually re-ignited–so much so that some that had been on my ‘to sell’ list are now back in the ‘keepers’ column. This is not as much a criticism of the 8600, as it is a reaffirmation of the quality that was built in to some of the great receivers of yesteryear.
Because my collection actually extends across 2 or 3 rooms, moving the 8600 away from my central receiver “stack” was not possible, so testing comparisons were limited to the sets mentioned above. I would have liked to compare the 8600 with, for example, some classic tube receivers (HQ-180A, Eddystone 830/7), but they have been mostly inactive and located away from incoming antenna inputs.
Here in Potomac, MD outside of Washington, DC, the addition of the Wellbrook a few years ago, after years suffering with long wires, fundamentally changed a difficult situation. Signals were boosted, noise reduced. I wish things had continued this way. Unfortunately about a year ago, my area began to be plagued by a troubling ignition-type buzz, source unknown, targeting 11,500 to 12,100 khz though noticed elsewhere in the shortwave bands. It has continued, usually worse in summer than in winter.
I begin with this to underscore what I noticed as a high point for the 8600: its Noise Blanker and digital noise reduction are in my opinion quite effective, so much so that when properly adjusted, they can eliminate troublesome ignition-type noise. While NR is useful, as noted in other reviews it needs to be used carefully so as not to introduce too much digital suppression.
Here is an example of NB and NR in use against severe ignition-type noise at my location:
Click here to view on YouTube.
In August of 2017, I had my first experience tuning a 8600 at a DXpedition in Ohio.
So, I had a basic grasp of the various controls — the A/B/C knobs, and the menu system. When I received my review unit from ICOM last November, I was up and running quickly, but still puzzled over some aspects of the receiver’s operation.
Thanks to Dave Zantow who alerted me to a possible issue involving firmware 1.30 which appeared to introduce an increase in audio harshness (ICOM has been alerted to this). Dave also had suggestions (see his full review of the 8600 and other receivers on his site) about audio adjustment and speakers, and tweaking of the front display to make maximum use of the Peak and Waterfall settings. Dave emphasizes that careful adjustment is required of the 8600’s tone controls and AGC decay settings to get the most out of the receiver.
Because it is among the receivers in my shack in close proximity to the 8600, I chose to perform a number of tests comparing the ICOM to the Japan Radio Company NRD-545. As everyone knows, the 545 was the last in JRC’s prosumer line of receivers. It is feature-rich — JRC threw everything into this receiver. But one issue followed JRC receivers through the 5xxxx series — noisy audio. After finally acquiring a 545 some years ago (a high serial number unit formerly owned by the late Don Jensen) I jumped on that bandwagon of criticisms about the 545’s audio. However, in terms of sensitivity and numerous tools to hear and process signals, the receiver remains among my favorites, and this remains the case after my comparisons with the 8600.
When I compared signals heard by the 8600 with the 545, I found that while the JRC does have that ‘DSP’ sound, it was in many situations actually clearer than the ICOM. That was the case even when following advice on adjusting the 8600’s tone controls and AGC. The following two videos compare the 545 and 8600 on 5,905 khz and 17,655 khz. A third shows the receivers on 6,040 khz demonstrating effectiveness of their notch filtering capabilities:
ICOM IC-R8600 v NRD-545 on 5,905 kHz
Click here to view on YouTube.
ICOM IC-R8600 v NRD-545 on 17,655 kHz
Click here to view on YouTube.
ICOM IC-R8600 v NRD-545 notch on 6,040 kHz
Click here to view on YouTube.
My next comparison was the Drake R8. Little can be said about the Drake R8xxxx series of receivers that hasn’t been said. That superb Drake audio, established with the R8 and continued through the R8B, puts these receivers at the top of the heap and makes stations stand out. So, it’s little surprise then when compared to the 8600, which is an SDR in the HF range up to 30 mhz or so, the R8 still sounded superior on many, though not all, stations. Use of the SYNC mode (not adjustable on the original R8, but was on the R8A/B) also improves recoverable detail on the Drake.
The following video shows the 8600, 545 and finally the R8 on 5,995 khz (Mali), and the three receivers compared on 9,650 khz (Guinea), and a third comparing the 8600 with the full range of receivers in my main receiver stack, tuned to 9,415 khz which at the time was China Radio International.
Click here to view on YouTube.
Click here to view on YouTube.
Click here to view on YouTube.
Despite what some critics have said, I believe that the 8600’s synchronous detection modes are actually pretty good, helping with fading and stabilizing signals. I think the ICOM’s sync is certainly superior to what I experienced with the IC-R75. I would rate the SYNC on the AOR 7030+ superior to the 8600, with the NRD-545 a bit behind the 8600.
Acquired about 2 years ago, my AOR-7030+ is a late serial number version of this fantastic receiver. If I were to sell every radio in my shack but 5, the 7030 would not leave. Put simply, it is among the top shortwave receivers ever made, with off-the-charts audio, and if one has the rare NB7030 card, amazing notch and other capabilities. Comparing the 7030 to almost any other shortwave receiver ever made is like putting a Ferrari on the track with the competition. The audio, and reception tools are just that good.
At the same time, in the 8600 ICOM has produced a receiver that has as many of the essential tools required to manipulate and clarify signals as exist. The twin passband tuning continues to be superb. Being able to vary bandwidth in conjunction with the PBT, and do so even in SYNC mode, further enhances reception powers. Combine this with the ability to actually see signals on the 8600’s beautiful color LCD — we’re getting pretty close to the ultimate receiver (though I would love for someone to drop the successor to ICOM’s IC-R9500 on my front doorstep).
The following videos compare the 8600 to the same full range of receivers, ending with the Watkins Johnson 8718A/MFP, all tuned to 5,935 khz, followed by a comparison of receivers tuned to 5,000 khz
Click here to view on YouTube.
Click here to view on YouTube.
In the following videos, I compare the 8600 to other receivers 11,810 khz (BBC) which shows
the superb audio of the Drake R8xxxx series, yet the 8600 does quite well, and another video
compares the 8600 with the 545 and R8 tuned to 6,070 khz.
Click here to view on YouTube.
Click here to view on YouTube.
In the months that I have had the 8600, I did some comparisons with other receivers, among them my Watkins Johnson 8718A/MFP, which you saw in several videos. WJs prior to the 8711/HF-1000s were built like boat anchors and are QUIET. WJ, Cubic and similar sets manufactured for government and intelligence agencies, shared superb sensitivity, and most cases, excellent audio.
Comparisons of the 8600 on shortwave frequencies had the so-called Premium radios out front. The ICOM clearly shined when it comes to modern signal processing and adjustment tools such as PBT, Notch, and infinitely variable selectivity.
Summary
So, here’s a summary of my impressions after weeks of testing the ICOM IC-R8600 against some of the top gun receivers of yesteryear.
The 8600 scores a 10 on reception tools that are useful — though not crucial in these days of waning shortwave broadcasting activity — in producing and processing listenable audio: Twin PBT, Notch and Auto-Notch, Variable Bandwidths (though limited at the high end to 10 kHz), Pre-Amp and Attenuation, and that beautiful color LCD that allows one to see signals.
Predictably, the 8600 doesn’t blow away premium receivers that were manufactured to pick up the signal equivalent of butterflies and targeted government and spy agencies, and it also does not out-perform a range of other classic receivers whose reputations are well-established.
From a sensitivity and audio perspective, there is no real competition with the Drake R8, which time and time again excels in producing superior easy-to-listen audio. And the same holds for the AOR 7030+.
JRC’s NRD-515 more than holds its own and in many cases exceeds the 8600 in signal sensitivity, and producing listenable audio, despite its selectivity limitations.
The NRD-545 — maligned by critics for its DSP audio, often produced highly-listenable audio even in comparison with the 8600. The ICOM and the 545 share features that provide tremendous flexibility, the tools required to slice and dice signals. If the JRC NRDxxx receivers were the modern equivalent of such boat anchor classics as the Hammarlund HQ-180A, the 8600 is certainly at the top of the heap when it comes to having those same tools in a 21st century receiver.
Audio Samples
I performed some additional audio only tests between the 8600 and NRD-545 on several frequencies. In each, I carouseled from wide to narrow on the 8600, and did the same on the NRD-545. Here are the results:
9,445 kHz
IC-R8600
NRD-545
9,420 kHz
IC-R8600
NRD-545
11,735 kHz
IC-R8600
NRD-545
11,810 kHz
IC-R8600
NRD-545
11,945 kHz
IC-R8600
NRD-545
15,580 kHz
IC-R8600
NRD-545
6,070 kHz
IC-R8600
NRD-545
9,650 kHz
IC-R8600
NRD-545
11,900 kHz
IC-R8600
NRD-545
You may have noticed that while on some examples the 8600 appears to sound better, the 545, with DSP technology born in the 1990’s is more than competitive with the ICOM.
Conclusion
In conclusion, with the 8600 we have a receiver that tunes up to 3 gHz, with highly flexible color scope, usable with HDSDR, with every tool imaginable for sifting through signals from 10 kHz up to 30 MHz, which is the area I have focused on for decades.
ICOM’s superb Twin PBT knocks out interference and narrows the heck out of any signal, with highly adjustable notch capabilities, customizable bandwidth functions, and what I consider to be highly effective noise blanking and noise reduction. Add to this 2,000 memory channels, multiple antenna inputs, adjustable attenuation and AGC and you have far more than what is needed given the current state of shortwave broadcasting.
Here’s the tough question: Would I recommend that a shortwave listener focused on what remains of listening in the SW bands purchase a 8600? Or to put it another way: Is the 8600 that much of a better radio in the SW spectrum? The answer has to be no.
Numerous receivers from the classics to even the latest portables with multiple selectivity flexibility (see the XHDATA D-808 or Eton Satellit) work for that. The used market overflows with superb HF communications receivers. Any of the Drake R8xxx series receivers, available on the used market for $400 to $1,000, now constitute overkill when it comes to reception in the MW to 30 mHz range.
But if you can project someday to having the time and patience to apply yourself to what is available above 30 MHz, and have the appropriate antenna(s) for those ranges, then by all means, the 8600 is the radio for you. It is the Babe Ruth’s bat of the receiver world — AND it has numerous flexible tools (though one wishes that ICOM had included DRM capability).
As I finalized this review, I continued to wrestle with the decision of purchasing the 8600 that was so generously provided by ICOM. You won’t read here what my final decision was–but anyone who is interested can contact me in coming days and weeks to learn the answer.
Last minute update Just before this review went to press, I discovered an issue of concern: when the 8600 was left on overnight, or for any period of multiple hours, upon awakening from “sleep” (screen off) mode, nothing but distortion is heard from the speaker. The only solution was to perform a POWER OFF/POWER ON, after which normal audio was heard. This issue was I brought to the attention of ICOM.
I want to thank Ray Novak and Faheem Hussain of ICOM for providing the 8600 used in this comparison, and for their patience as I encountered several delays completing my review and getting to print. And thanks to Thomas Witherspoon without whose initial encouragement, this review would not have been possible.
Dan, thank you for an amazing IC-R8600 review and comparison with your benchmark commercial grade receivers! Thanks for taking the time to make thorough comparison video and audio recordings. Your guest posts are always most welcome on the SWLing Post!
515 PWL Receiver; Japan Radio Company (JRC); Unknown on eHive
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키워드에 대한 정보 jrc nrd 515
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