Tag Archives: Icom IC-R8600

Matt’s Rooftop Receiver Shootout: Round Two!

Many thanks to SWLing Post contributor, Matt Blaze, for the following guest post:

Matt’s Rooftop Receiver Shootout, Round Two.

by Matt Blaze

You may recall that back in April, I dragged eight of my favorite receivers up to the roof, hooked them up to a portable antenna, and compared their abilities to demodulate various signals at the same time. For the most part, the similarities between radios were more striking than their differences. I hinted that there’d be a second installment to come, including more receivers and more challenging signals, to further expose and highlight the practical real-world performance differences between the radios we use.

So, as promised, here we are with Round Two of my Rooftop Receiver Shootout.

This time around, I used approximately the same setup, but with a total of fifteen different radios. And once again, I took advantage of nice weather and brought a multitude of receivers, recording gear, cables, and an antenna up to my roof to listen to and record shortwave signals under the open sky.

Our fifteen receivers included everything from “dream radios” from the 1980’s to current-production desktop models to less expensive modern portables to high-performance bench-top lab measurement gear. I tried to curate samples of a wide range of radios you may be familiar with as well as some you probably aren’t.

The lineup consisted of:

  • Icom R-8600, a current production “DC to Daylight” (or up to 3 GHz, at least) general coverage communications receiver, with highly regarded shortwave performance.
  • AOR AR-ONE, another DC to 3 GHz general coverage radio, less well known due to the high price and limited US availability. Excellent performer, but a counterintuitive and awkward (menu-driven) user interface is less than ideal for shortwave, in my opinion.
  • Reuter RDR Pocket, a very cute, if virtually impossible to get in the US, small production, high performance SDR-based shortwave portable receiver. It’s got an excellent spectrum display and packs near desktop performance into a surprisingly small package.
  • AOR 7030Plus, an extremely well regarded mobile/desktop HF receiver from the late 90’s. Digital but retaining some important analog-era features like mechanical filters. Designed and (mostly) built in the UK, it’s got a quirky menu-driven user interface but is a lot of fun once you get used to it.
  • Drake R8B, the last of the much-beloved Drake receivers. Probably the chief competitor to the 7030+.
  • Drake R7A, an excellent analog communications receiver (but with a digital VFO) from the early 80’s. It still outperforms even many current radios.
  • Sony ICF-6800W, a top of the line “boom box”-style consumer receiver from the early 80’s. Great radio, but hard to use on SSB, as we saw in Round One.
  • Panasonic RF-4900, the main competition for the Sony. Boat-anchor form factor, but (improbably) can run on internal D-cell batteries. Generally impressive performer on AM, but, like the Sony 6800, difficult to tune on SSB.

You may remember the above radios from Round One back in April. The new radios this time were:

  • Tecsun 501x, a larger-format LW/MW/HF/FM portable released last year. As noted below, it’s a generally good performer, but regrettably susceptible to intermod when connected to a wideband external antenna (as we’ll see in Part One).
  • Tecsun PL-990x, a small-format portable (updating the PL880), with many of the same features as the 501x. Like the H501x, good performance as a stand-alone radio, but disappointing susceptibility to intermod when fed with an external antenna.
  • Sangean ATS-909x, a recent LW/MW/HF/FM portable with a good reputation as well as a few quirks, such as only relatively narrow IF bandwidth choices on HF. Excellent performance on an external antenna.
  • Sangean ATS-909×2, an updated, current production version of the ATS-909x that adds air band and a few performance improvements. Overall excellent, though I would prefer an addition wider IF bandwidth choice. My go-to travel receiver if I don’t want to take the Reuter Pocket.
  • Sony ICF-7600GR, a small-format digital LW/MW/SW/FM portable introduced in 2001 and the last of the Sony shortwave receivers. Showing its age, but still competitive in performance.
  • Belka DX, the smallest radio in our lineup, made in Belarus. You’ll either love or hate the minimalist interface (one knob and four buttons). If you’re going to secretly copy numbers stations in your covert spy lair, this is a good radio to use. Can be difficult to obtain right now due to sanctions.
  • Finally, a bit of a ringer: the Narda Signal Shark 3310, a high performance SDR-based 8.5 GHz RF spectrum and signal analyzer. As with most test equipment like this, demodulation (especially of HF modes) is a bit of an afterthought. But it has an excellent front end and dynamic range, intended for identifying, extracting, and analyzing weak signals even in the presence of strong interference. Not cheap, but it’s intended as measurement-grade lab equipment, not consumer gear. Demodulated audio is noticeably delayed (several hundred ms) compared with other receivers due to the multi-stage DSP signal path.

The antenna was my portable “signal sweeper” Wellbrook FLX-1530 on a rotatable tripod, using a power splitter and a pair of Stridsberg Engineering 8-port HF distribution amplifiers to feed the fifteen radios. So every radio was getting pretty close to exactly the same signal at its RF input. Continue reading

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Frans uses SDR-Control with his IC-R8600

Many thanks to SWLing Post contributor, Frans Goddijn, who shares the following article and video originally posted on his blog:

SDR-Control for iCOM IC-R8600 (and bhi DSP demo)

The new SDR-Control app that lets you use certain iCOM radios as remote controlled SDR stations for Macbook or iPad does not yet (May 2022 now) officially support my iCOM IC-R8600 but Marcus Roskosch from https://roskosch.de/ told me that he recently purchased an IC-R8600 and the app already works on an experimental basis.

I immediately bought the app, installed it on my MacBook, connected a network cable between home router and radio and tried it out…

I also show how I use bhi DSP units to filter out noise to enhance speech at the radio and at the computer audio.




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Matt’s 2022 Rooftop Receiver Shootout!

Many thanks to SWLing Post contributor, Matt Blaze, for the following guest post:

2022 rooftop receiver shootout

by Matt Blaze

I realized it’s been long past time for me to do another head-to-head receiver comparison “shootout”, where you can compare the audio from multiple radios receiving the same signal at the same time. Long time readers of Thomas’ blog may remember I’ve posted a few of these before.

So I took advantage of the nice weather and brought a bunch of radios, recording gear, and an antenna up to the roof to listen and record signals under an open sky. My neighbors, no doubt, wondered what I must have been up to. (Don’t tell them I’m just a harmless radio nerd.)

This year, our focus is on eight “dream receivers” from the 1980’s to the present. Each radio is at or near the top of the line in its class at the time of its release. Our radios include, in roughly reverse chronological order:

  • Icom R-8600, a current production “DC to Daylight” (or up to 3 GHz, at least) general coverage communications receiver, with highly regarded shortwave performance.
  • AOR AR-ONE, another DC to Daylight general coverage radio, less well known due to the high price and limited US availability. Excellent performer, but a terrible (menu-driven) user interface for shortwave, in my opinion.
  • Reuter RDR Pocket, a very cute, if virtually impossible to get in the US, small production, high performance SDR-based shortwave portable receiver. It’s got an excellent spectrum display and packs a lot of performance into a surprisingly small package.
  • AOR 7030Plus, an extremely well regarded shortwave receiver from the late 90’s; designed in the UK. It’s got a quirky menu-driven user interface but is a lot of fun to use.
  • Drake R8B, the last of the much-beloved Drake receivers. Probably the chief competitor to the 7030.
  • Drake R7A, an excellent analog communications receiver (but with a digital VFO) from the early 80’s. It still outperforms even many current radios.
  • Sony ICF-6800W, a top of the line “boom box” style consumer receiver from the early 80’s. Great radio, but hard to use on SSB.
  • Panasonic RF-4900, the main competition for the Sony. Boat-anchor form factor, but runs on batteries. Excellent performer, but also hard to use on SSB.

The radios were fed from my portable Wellbrook FLX-1530 antenna, using a Stridsberg Engineering HF distribution amplifier. So every radio was getting pretty close to exactly the same signal at its RF input.

Recordings were taken from the line output, if one was available, or the external speaker/headphone output otherwise. In either case, the audio was then isolated and converted to a balanced signal for recording.

For each signal, I recorded monaural “solo” tracks for each radio, as well as a narrated stereo track in which I compared the audio from each radio (one after the other) against the Icom R8600, with the audio from the R8600 on the left channel and the audio from the other radios on the right channel. This gives you a quick overview of what all the radios sound like.

The stereo recording requires some explanation. For it to make any sense, you MUST listen in stereo, using decent headphones if at all possible. You can switch earpieces back and forth (with your finger on pause and rewind) to get a quick idea of what each radio sounds like compared with a modern receiver, and how they handle things like fades and static.

The solo tracks, on the other hand, consist entirely of the continuous audio from a single radio, with no narration or interruption.

I recorded three different signals, for a three part comparison. (Parts four and up will come, hopefully, soon). I think both the differences and similarities will surprise you.

Part One

Our first signal was the BBC on 9915 KHz, broadcasting from Madagascar to western Africa. This signal was extremely marginal here, intended to show how each receiver can or can’t handle signals down in the noise. It’s definitely not “armchair copy”.

The stereo overview is at:

The individual receiver solo tracks can be found here:

Icom R-8600:


Reuter RDR Pocket:

AOR 7030Plus:

Drake R8B:

Drake R7A:

Sony ICF-6800W:

Panasonic RF-4900:

Part Two

Our next signal was the Shannon (Ireland) aviation VOLMET broadcast on 5505 KHz USB. This synthesized voice gives the latest meteorological conditions at airports around Europe. The signal was not strong, but entirely readable. It shows how the radios handle a weak SSB signal. Note that the Sony and Panasonic consumer radios, though equipped with a BFO, were VERY hard to tune properly.

The stereo overview is at:

Receiver solo tracks can be found here:

Icom R-8600:


Reuter RDR Pocket:

AOR 7030Plus:

Drake R8B:

Drake R7A:

Sony ICF-6800W:

Panasonic RF-4900:


Part Three

Our final signal was a stronger, though occasionally fading, shortwave broadcaster, Radio Romania International on 13650 KHz AM. This gives you a sense of how the receivers performed on a typical “average” signal that you might actually want to enjoy listening to. Because the radios have different filters and other capabilities, I tuned each radio to whatever sounded best; I did not attempt to use comparable settings (since no common settings existed).

The stereo overview can be found at:

And the individual solo tracks are here:

Icom R-8600:


Reuter RDR Pocket:

AOR 7030Plus:

Drake R8B:

Drake R7A:

Sony ICF-6800W:

Panasonic RF-4900:

Subsequent comparisons, hopefully soon, will focus on receiver performance on signals in crowded bands and under various kinds of interference and noise.

A quick note on production: The recordings were made with a 12 channel Sound Devices 833 recorder with a Sound Devices SL-16 mixing console. The audio was isolated and converted to balanced output with Switchcraft 318 direct interface boxes (highly recommended for recording radios with pro audio gear).

The stereo track narration was done by me in real time, as the signals were being recorded. I made some comments about which receivers I thought sounded best that were not always the same as what I would later conclude after carefully listening to the solo tracks once back inside. But judge for yourself. I used a Coles “lip” microphone, an amazing ribbon mic designed decades ago for the BBC for use in highly noisy environments. It was very effective in reducing the sometimes considerable street noise and other ambient outdoor sounds.

Thanks for listening and 73!

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Giuseppe compares the Icom IC-R8600 with the IC-705

Many thanks to SWLing Post contributor, Giuseppe Fisoni, who reached out a few weeks ago noting that he was very impressed with the Icom IC-705‘s receiver performance even compared with his Icom IC-R8600 wideband receiver.

I asked Giuseppe if he would perhaps write up a short informal report to share here on the SWLing Post. He just sent me the following notes:

Hi Thomas,

[…]Consider this more of a qualitative comparison – just S meter readings with a few brief notes.

My overall impression is that the IC-705 is a fantastic SW receiver, as you’ve already made clear on all your posts. In most cases, it holds up well against the IC-R8600, and even performs better in some cases. I have some notes below, which you are welcome to share with your readers if you’d like. For a while I also had two IC-705s in my hands, so I even got to test “replicas” with the 705 (there was no major difference but it was still fun to do).

A few things about my comparisons:
1. All tests were done using a 50’ long wire antenna (house to tree) with an un-un.
2. The IC-R8600 was operated using an ICOM AC adaptor (creating a disadvantage), while the IC-705 was run on battery. However, I tried to only compare stations where the noise floors were comparable and the 8600 didn’t have any RFI.
3. I tried my best to normalize the RF gains on each radio, but this became somewhat difficult. I’m not sure if they are on the same scale (i.e. does 80% RF gain mean the same thing on both radios?). Also, I very quickly noticed that turning up the RF gain on the 8600 only increased the S meter reading and apparent noise floor on the waterfall spectrum, but it did not actually make the audible signal or noise audibly stronger. This was especially true from 50% and up on the RF gain. In contrast, the RF gain on the 705 operated as you’d expect – the more you turned it up, the higher the gain on the signal (and noise), evenly across 0-100%.

Test #1

0211 UTC
3,330 kHz CHU

IC-705: weak signal but audible, S6
IC-R8600: no signal!

Winner: clearly 705. Shocked the 8600 couldn’t pick up CHU!

Test #2

0219 UTC
3,215 kHz WWCR Nashville

IC-705: S9+20
IC-R8600: S9+20 to S9+40.

Winner: Tie – although the 8600 had a stronger signal on the S meter, it didn’t really sound any better than the S9+20 on the 705.

Test #3

1958 UTC
9,690 kHz Radio Espana Exterior

IC-705: S9 to S9+10
IC-R8600: S9+20

Winner: Another tie – the stronger signal didn’t make much of a difference. The 8600 only sounded slightly better because of its speaker, not the receiver, so I’m calling it a tie.

Test #4

2001 UTC
10,000 kHZ WWV

IC-705: S3, very weak
IC-R8600: S7 to S9 but high atmospheric noise

Winner: 8600

Test #5

2006 UTC
11,820 kHz Radio Riyadh

IC-705: S1, barely detectable
IC-R8600: S5 to S7, intelligibility unstable

Winner: 8600

Test #6

2012 UTC
15,000 kHz WWV

IC-705: S3 to S5
IC-R8600: S9, slightly clearer and crisper tones

Winner: 8600, but not by much

Test #7

2015 UTC
15,580 kHz VOA Selebi-Phikwe, Botswana

IC-705: S1 to S3, in and out with fading
IC-R8600: S9, much more stable signal

Winner: 8600

Test #8

00016 UTC
7,780 kHz WRMI Slovakia International

IC-705: S9 solid, stable signal
IC-R8600: S9, same

Winner: Tie

Test #8

0022 UTC
6,604 kHz USB Gander VOLMET

IC-705: S5 to S7
IC-R8600: S9

Winner: Tie, no real difference

Test #9

2335 UTC
11,940 kHz Radio Exterior Espana

IC-705: S5 to S9 solid signal with some fading
IC-R8600: S9

Winner: Tie – no obvious difference

Test #10

2344 UTC
9,420 kHz Helliniki Radiophonia, Greece

IC-705: S9 +20. Excellent signal
IC-R8600: S9+ 20-30. Excellent signal

Winner: Again, a tie. But the wonderful Greek music reminds you again how much better the speaker is on the 8600.


Here’s the important thing: even though in most cases the IC-R8600 pulled in a much higher S meter reading, it often didn’t matter unless the difference between the two radios was a lot. In cases where it mattered, I could have turned up the RF gain or preamp on the 705 to match the signal on the 8600 (unless it was really weak on the 705), but I was trying to avoid that for the sake of having some baseline for comparison. How comparable are RF gain levels across ICOM radios?

IC-705 pros/cons take aways for me:

    • High level of portability and ability to operate on battery
    • Has desktop-like features and controls
    • Ability to use tripod or custom stand offers custom ergonomics (I found it easier to look at and interact with than the 8600, which has a lower angle of display)
    • All-in-one package: SWR + HF/VHF/UHF transceiver
    • Built-in audio speaker leaves a lot to be desired, definitely not desktop receiver audio quality
    • No stereo headphone jack

My verdict

I am quite impressed with the IC-705! I am looking to downsize my radios and these comparisons have convinced me that the 705 can really check a lot of boxes for what I am looking for in a radio. I think it really offers a lot in a small footprint, which I find very impressive. So, since I have no use in monitoring anything above UHF, I will be looking to sell the IC-R8600, even though it is also a very great radio.

All the best,

Fascinating report, Giuseppe! Thank you so much for taking the time to perform these comparisons and sharing them with us.

Like you, I believe the IC-705 could replace a number of my other radios. I originally purchased it for my review and planned to sell it after, but quickly realized there’s no way I’m selling it. In fact, it could convince me to sell other radios it effectively makes redundant.

For SWLs who have limited space for a listening post in their home and who like to take their radio to the field, the IC-705 is a no-brainer. It’s an investment at $1,300 US, but I believe it’s a quality rig and certainly an outstanding, feature-packed unit.

I’ve found that the IC-705’s performance on HF and Mediumwave is truly DX-grade. I imagine its FM performance is as well.

It’s funny that you mention the IC-705 front-facing speaker as a con, because I often tout it as a pro. Thing is, I’m most often comparing the IC-705 with other field-portable QRP transceivers. Compared with them, the IC-705 speaker is amazing.  But compared to the IC-R8600 or, say, a Drake R8B or SW8? Yeah, I agree with you 100%–it’s just not in the same league with those tabletop receivers. Of course, you can port out the audio to a better speaker if needed. (Indeed, the IC-705 even has built-in Bluetooth!)

Thanks again for sharing your notes with us, Giuseppe!

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Icom IC-R8600 added to Sherwood’s Receiver Test Data Table

Icom IC-R8600

Rob Sherwood, at Sherwood Engineering, has now published test results of the Icom IC-R8600 wideband receiver. The IC-R8600 is (impressively) second from the top of the list sorted by third-order dynamic range narrow spaced if phase noise limited:

Click here to view the full list at Sherwood Engineering.

Click here to check out Dan Robinson’s recent review and benchmark receiver comparisons with the IC-R8600.

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Guest Post: A review of the Icom IC-R8600 wideband SDR receiver

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.

The new Icom IC-8600 at the 2017 Hamvention

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.

Watkins Johnson 8718A/MFP

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.


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



9,420 kHz



11,735 kHz



11,810 kHz



11,945 kHz



15,580 kHz



6,070 kHz



9,650 kHz



11,900 kHz



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.


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!

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Download the ARRL review of the Icom IC-R8600

Many thanks to SWLing Post contributor, Dave Zantow (N9EWO), who notes that the recent ARRL review of the Icom IC-R8600 is available as a free download via Icom America.

Click here to download (PDF).

Note that Dave continuously updates his own review of the IC-R8600 as well.

Thanks for the tip, Dave!

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