Tag Archives: Sony ICF-SW7600GR

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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Frank finds a Sony ICF-SW7600G/GR replacement antenna

Many thanks to SWLing Post contributor, Frank, who writes:

Thomas,

I have asked for and received help from your members a couple of times during the last year. I am sending this to you in an effort to “give something back” to your members.

I managed to stupidly break the built-in whip antenna on my Sony 7600GR and looked for a replacement. Several are on eBay for 5- 60 dollars which is a bit steep.

I eventually tried one (for $20) in the link below from eBay:

https://ebay.us/OpHEeP

It arrived very quickly (under 2 weeks from China) and it simply went into the radio with no problems and it works very well.

I am not a radio HAM or electronics expert so it may not be perfect but to me the reception is at least as good as the original.

If anyone needs one, it would be well worth trying.

Regards,

Frank from England

Thanks so much for sharing this useful tip, Frank!

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Sony could halt production of shortwave radios in February

Several SWLing Post readers have sent me a link to this item on BCL News (originally posted by Takahito Akabayashi via WOR) stating that Sony will cease production of all shortwave radios this month:

SONY Japan declared in January that they ended the production of ICF-SW35 shortwave receiver. They also declared in February that they end the sales of another shortwave receiver ICF-7600GR at their on-line store. Probably they will declare the end of its production soon.

ICF-SW35 has been on sale since 2000, ICF-7600GR since 2001. This means SONY will completely withdraw from the shortwave receiver market.

I have not been able to locate a statement from Sony regarding this, but I’m not at all surprised if it is true. Shortwave radios represent such a small niche market for Sony, I’m surprised they’ve continued producing them up to 2018. Indeed, to my knowledge, they haven’t updated their benchmark portable (the Sony ICF-SW7600GR) since they released it in 2001. That’s an incredibly long market life!

The ‘7600GR is still one of my favorite portables even though it lacks an encoder/tuning knob and isn’t as sensitive as the Tecsun PL-680, for example. I do love its sync detector and rock-solid AGC. Additionally, it’s one of the few portables on the market that has a proper line-out audio jack for recording and a variable attenuator.

Production of the ‘7600GR has been sporadic–a number of times, Sony gave retailers the impression the product line was dead only to release small batches of new units from time to time. Likely, they’ve been clearing out the final production run.

I predict the price of the ICF-SW7600GR will climb as they become a little more scarce.

Looking back, I wrote a post in September 2016 describing where to find new or open box units online. If you’re interested in the ‘7600GR, check out that post in our archives.

If anyone finds a release from Sony regarding this news, please comment with a link!

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Anil’s hack: Using a smart phone battery bank to power portable receivers

Many thanks to SWLing Post contributor, Anil Raj, who writes:

I wanted to share a small but useful hack with your readers.

I use a common garden variety smartphone “Powerbank” 10,000 mAH Li Ion pack to power my Sony 7600GR which is perfectly happy with the 5V which the pack supplies. [See photo above.] I see no reason why this won’t work with other radios which require a 6V supply.

As you can imagine, the setup typically lasts for many weeks of extended daily listening and recharges in a jiffy. However, one needs to sacrifice a USB cable by soldering a DC plug at the other end. Haven’t bought AA batteries in a long time…

Thank you, Anil! What a simple but useful hack. The best part is, battery packs/banks are  very inexpensive these days and, I for one, have a number of USB cables I could sacrifice for the job!

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Video: Shortwave shootout with the Tecsun S-8800

After enjoying an afternoon testing the Tecsun S-8800 on the Blue Ridge Parkway this past weekend, I decided to return to the parkway yesterday and test the S-8800’s shortwave performance.

I carved out about two hours of my afternoon and spent the entire time comparing the S-8800 to the Tecsun PL-880 and the Sony ICF-SW7600GR. I tested the radios on several shortwave bands and in both AM and SSB modes.

On Sunday, we discovered that mediumwave performance is lacking on the S-8800. Not so on shortwave! Check out this short video:

Click here to view on YouTube.

In my comparisons, the Tecsun S-8800 has consistently outperformed the PL-880 and Sony ICF-SW7600GR on the shortwave bands. The AGC is pretty stable and sounds much like that of the PL-880 when QSB (fading) is present. Sensitivity is better than the PL-880, though, so the S-8800 can dig those signals out of the noise a little better.

Note, too, I had to pick up both the PL-880 and ‘7600GR  in my hand to obtain the best performance–that additional grounding gave each a slight boost. Quite common for portables. The S-8800 didn’t require this.

After I returned home yesterday, it struck me that perhaps a longer telescopic whip gave the S-8800 an advantage. Turns out, it’s only three inches longer than the PL-880’s whip.

Next, I need to spend a little time with the S-8800 mapping out any birdies on HF–a tedious process. I hope to start on that today.

To follow updates on this yet-to-be-released receiver, follow the tag: Tecsun S-8800.

UPDATE: Click here to read our full Tecsun S-8800 review.

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Powering the Sony ICF-SW7600GR with USB rechargeable packs?

Many thanks to an SWLing Post reader who recently asked the following question:

Hi Thomas:

I rely on my SONY Shortwave in case of emergency, but it’s occurred to me that relying on the alkaline batteries inside to be fully charged and not corrode wouldn’t make sense.

I am thinking it would be great to be able to power the radio’s 6V 700ma off of the multiple USB rechargeable power sticks I have around the house.

What I need is a cable from the USB stick to the radio.

As a hobbyist project, any ideas for an existing cable or how to make such a cable with the appropriate power circuit?

Many thanks.

I know a power cord can be created as long as polarity and the coaxial plug match what the Sony requires. I’ve never used the Sony on a 5 VDC source–I assume it’s within tolerance and RX sensitivity wouldn’t be affected?

Post readers: If you’ve ever created or purchased a USB power cable for the Sony ICF-SW7600GR, please comment!

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Using the Sony ICF-SW7600GR with external antennas

Many thanks to SWLing Post contributor, Steven Crawford, who writes:

As the 7600GR supplies 6v DC to the external antenna jack to power their active loop antennas there seems to be a great deal of confusion on the web about whether one can or cannot use an external antenna such as a random length of wire attached to the center tip of a barrel connector.

I have been unable to locate the blog entry but I seem to remember you discussing this in one of your posts. In it you mentioned you had built a widget that killed the voltage and allowed you to use the external antenna of your choice. I would appreciate your thoughts on a random wire to center tip antenna and details of the widget you built when you have time.

Thank you for your question, Steven.  I hope a reader can help point to the post you’ve mentioned.  I believe I recall reading this in a guest post–I know I’ve never used a device to kill the 6V phantom load in the antenna out jack.

 

I suppose I’ve (incorrectly?) assumed the Sony would only push voltage out if connected to the Sony AN-LP1 (see right).

I know I’ve used a number of antennas with the ICF-SW7600GR: long wires, the PK Loop, The EF-SWL, the NASA PA 30, and even a rather large multi-band dipole when I recorded the final broadcast of RNW. I’ve never experienced a problem, nor damaged the antenna/receiver as of yet.

Can anyone shed some light on this? Please comment!

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