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Pristine JRC NRD-525 Communications Receiver!

I think variety is important, and I’ve been wiped out for over a week with the flu, so forgive me as we look at something a bit different today. It’s still beautiful, well-made, produces sound and is electronic, but this one is related to another passion of mine. Check out this stunning almost new-in-box JRC NRD-525 communications receiver I recently purchased from Japan!

Background

You may not know that I’ve been a radio nut since I was a youngster. I started with a classic Dick Tracy-style AM radio watch, progressed to making various radios and other stuff with my Tandy 200-in-1 electronics set, moving on to building many of the wonderful Dick Smith Electronics Fun Way 12 and 3 kits. Dick Smith is a national treasure BTW!

At 13 or 14, I purchased a National stereo boombox with a built-in shortwave radio that I listened to every night as a kid. I still have it.

JRC NRD-525
Always a good sign when someone has made the effort to preserve the original box, and everything that goes inside it!

Since then I’ve owned a couple of ‘proper’ shortwave radios including a Yaesu FRG-7700, and later a Yaesu FRG-100B. These were both great receivers but I sold them, now I wish I’d kept them! Perhaps 10 years ago I bought a lovely Icom IC-R75 and fitted a precision reference oscillator and DSP module to it. I later snagged a beautiful Kenwood QR-666 old-school ’70s shortwave receiver, both of which I still own. I also have a couple of portables, a Sony ICF-SW77 and a Sony ICF-SW7600G. I might sell the SW77.

img_3402.jpeg
My lovely Yaesu FRG-100. I should have kept it, though, in all honesty, the IC-R75 and NRD-525 are much better radios. I feel the same way about the FRG-7700.
Kenwood QR-666
What a beauty, my Kenwood QR-666 radio, back in 2020. I still have this one, a lovely thing. Remember when radios used to look like this?
JRC NRD-525
Oh yeah, VERY encouraging. I can’t see a mark on this radio after removing it from the box.

Does anyone else think I collect too much electronics..?!

JRC NRD-525

Anyway, Japan Radio Company or JRC always made the most expensive and most serious shortwave receivers. Ironically, it’s only now that I can afford something like this almost mint, in-the-box JRC NRD-525 I just purchased from Japan.

JRC NRD-525
I swear there’s not a mark on this 35-year-old radio.

The JRC NRD-525 communications receiver cost $1250 USD or around $2500 AUD back in 1986, so that will tell you where this premium radio was aimed. It also explains why there was no possible way I could ever afford one at 16 years old! I can now though, now that the shortwave bands are sadly much quieter.

JRC NRD-525
Some buttons have yellowed which is always a shame but to be expected. Other than that, the display is a little dim, again to be expected of an older VFD. She works perfectly too. I got really lucky with this import.

I still have a full RF alignment set-up and believe I am one of just a few people still aligning AM/FM stereo tuners and other radios for consumer use. Anyway, enjoy a short video and a few pics of this fine receiver. Any other radio nerds out there in my regular readership or beyond, please comment below and tell me what radios you own. Likewise, if you love RF test gear, tell me what you have!

JRC NRD-525 Unboxing & Discussion Video

One thing I love about buying equipment from Japan is how Japanese sellers typically understate the condition of the things they are selling. This radio was listed as coming with the original box, cables and papers, yes, but they didn’t mention the accessories, brochure or perfect, pristine physical condition of this radio. I doubt it spent much time being used. It likely sat in the box for decades.

You’ll appreciate my fluey voice in this video from a few days ago 🙂

JRC NRD-525
How good is it getting all these original documents?!

Additional Work

Being an older piece of electronics, and being a radio, I knew it would need some adjustment and calibration, and you know how much I love calibration!

JRC NRD-525
This is where the money goes in a JRC NRD-525. These radios are built to computer and almost lab-grade standards, using premium parts. The card-style design means each card is/was replaceable in the field, and each is shielded in a metal compartment. This keeps noise levels way down and makes working on one of these radios a joy, though extenders are needed to make some adjustments. This is both good and bad, good in that it minimises ill-advised ‘tweaking’, a huge bonus with a radio. This NRD-525 is internally factory-pristine and untouched. No other consumer radios were built like this.

I replaced the memory battery which is a soldered-in CR-2032, with a button cell holder and fresh removable CR-2032 cell.

JRC NRD-525
Soldered-in CR-2032… Note the tantalum capacitors. Contrary to what you’ll often read, tantalums are used for their excellent high-frequency performance and high C:V ratio. They are specifically chosen for use in equipment like this because they are better than other electrolytic types. The quality of these cards is next level for what is consumer radio gear.
JRC NRD-525
Much easier to replace this new, removable CR-2032! Note the grounding strip on both edges of every card. These strips contact the frame/chassis of the radio via metal wipers. Again, extraordinary attention to detail. Date codes on ICs show that this radio was built sometime after mid-1987, probably 1988 or 1989.

I also performed a mini-alignment and calibration, refreshing various critical voltages and the reference frequency of the 12.8MHz temperature-controlled quartz oscillator.

JRC NRD-525
Let’s run through what’s happening here. In this shot, we see my Philips PM 6674 frequency counter on the left, NRD-525 in the middle and my GPS disciplined 10MHz reference on the right. I’ve calibrated the reference quartz oscillator in the radio to yield the test frequency of 80.453MHz +/- 20Hz. We are +/-0Hz, right on frequency and well within the +/- 20Hz spec, courtesy of the GPS disciplined oscillator, which I’m using as an external reference for my PM6674, my ‘quick and dirty’ workshop counter. An integration time of around 10 seconds yields the requisite 8 digits of resolution, and a spot-bollock master oscillator frequency with a little patience and no extenders needed. The joys of having the right equipment, I can’t tell you how good it is to be able to reach for a piece of test and measurement equipment that simply works and can be relied upon. My internal lab has even higher precision stuff that isn’t needed here.

Results

So, even though this is not a hi-fi article, how does she sound? On AM radio broadcasts, I’ve never heard better. You can select a roughly 12kHz filter for AM reception that yields such a rich warm tone that it’s hard to believe it’s AM radio. It’s not a patch on FM of course, but we don’t buy receivers like this for that purpose.

After a clean and minor service, this JRC NRD-525 runs even better. She is a very sensitive radio, possibly slightly better than my Icom IC-R75, based on initial testing, but without adding in either of the Icom’s two preamplifiers. I think it’s also slightly quieter than the Icom but more testing is needed to verify this.

To be fair, both radios perform exceptionally well. The NRD-525 has better audio though, no doubt about that. This makes it a much more pleasant radio to listen to on broadcast stations for example.

JRC NRD-525
I serviced the switches and controls of my NRD-525 with a non-residue-leaving premium product and lightly cleaned the case. There is no display malfunction, it’s a VFD refresh rate/phone shutter interaction thing.
JRC NRD-525
8.5kg, mostly metal and high-quality plastics, they don’t make radios like this any more. There are still some nice radios being made, however, but they are lightweight, mostly software-defined radios these days with much of the magic RF-ery gone. With no DSP in older radios like this, they sound smoother, too.
JRC NRD-525

As always, thank you for visiting and for taking the time to read this slightly different article from the usual staple of hi-fi products.

Even though I don’t advertise this kind of radio work, I still do a little of it. More of my time is spent with hi-fi tuners, but I revived this stunning old National / Panasonic DR22 / RF-2200 for a customer a couple of years ago, so don’t be shy!

National Panasonic DR22
RF-2200
These National Panasonic RF-2200 / DR22 radios are absolute classics. These days, they sell for many hundreds of dollars, much more than they originally cost. All the receivers in this series especially the RF-2700 and RF-4900 sell for insane money now and have become highly collectible, which is interesting as they are very much consumer-grade radios vs the NRD-525 for example which is in another league altogether.

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8 thoughts on “Pristine JRC NRD-525 Communications Receiver!”

  1. I think you should consider opening a museum in the future! I’m being serious.

    We went to the Patek Phillipe museum a few years ago and spent several hours looking at the several floors of PP watches. I’d certainly come if I could listen to some of your pieces of equipment. I’m sure Pierre could lend you a few pieces.

    Steve

    1. Thanks Steve! A museum of modern electronics would be a wonderful thing, or even more specifically about audio or even just hi-fi gear. I could muster up a few troops for this one including Pierre, for sure!

  2. Nice to see a bit of your diversity Mike! My 1st guru in the rudiments of audio & a near lifelong friend is a serious 2-way radio enthusiast who is working towards erecting a 30 meter antenna tower in his backyard. I forwarded this piece to him as I believe it will be of great interest. I’m also looking to build a more modest DIY loop antenna for my rooftop as my 80s period tuner, a Technics ST G5-L, has LW & MW band features.

    1. Thanks Tim, I highly recommend a loop like the ‘youloop’ I’m using, they are excellent performers on sensitive proper radios like the ones you describe and very affordable. You can attach them to a lightweight mast of some kind and they reject noise so well, it’s like having a new radio!

  3. I’m sure there must be a “spot-bollock master oscillator frequency” appearing somewhere in one of the Back To The Future films, or a Doctor Who episode…

    That’s a phrase I certainly didn’t have in my vocabulary before reading this!

    Thanks again Mike for sharing your passion and experience in such an entertaining, educational and readable post. Hope you’ve shrugged off that ‘flu.

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