DX Tuners Returns

www.dxtuners.com

It's back! About 6 months after closing down the network, Kelly Lindman of Sweden brought the network back to life. Now run as a no-charge private network, many of the radios on the system are back again. Currently Kelly has capped the membership to the network, but expects to open it back up in the future.

My node, the Pennsylvania DX radio, is back - this time with an Icom R-75 receiver replacing the former IC-718 transceiver which I plan to use for ham radio purposes.

Welcome back!

IBOC - Night 3

What a difference two days makes. This SDR-IQ plot shows the entire 695-865 kHz wide band filled with the tell-tale white bands of IBOC digital hash. Compare to my previous post which showed a relatively open spectrum the first night of IBOC, Sept. 14 2007.

Start of Nighttime IBOC

At 12:01 AM Eastern last night, full nighttime IBOC broadcasting began in the US on the medium wave band. Above is an example of the spectrum from the SDR-IQ receiver showing the digital hash from 700 WLW and 710 WOR extending to stations +/- 15 kHz from their carrier. On this band segment those two stations were by far the most notable IBOC signals. It's not certain whether any other stations were broadcasting on IBOC in that range last night.

Scheduled Recordings with Spectravue

I love using my new SDR-IQ radio to record 190 kHz of spectrum. But, the program that controls the radio (SpectraVue) only accommodates a single event recorder which can repeat once per day. I like to do repeated top-of-the-hour recordings during the night while I sleep (from, say :58 to :02) to review for IDs later in the day. Until the author of SpectraVue adds that capability, or others add the feature via a separate application, I needed another way to do it.

Once SpectraVue is running and configured to record, pressing the "start" (F12) key starts the recording and automatically saves the resultant data into a uniquely-named file. Pressing the "stop" (F10) key stops the recording. Each time you start the recording, it automatically creates a new data file with a date and time stamp. I hit upon the idea of using a macro program that sends key presses to the program to do this.

I found the free program AutoHotKey through a Google search. Using its built-in scripting language, you can send the commands to start, wait a programmable period of time, then send the command to stop. Here's the simple script I wrote and saved as a text file:

WinActivate SpectraVue 2.21
WinWaitActive SpectraVue 2.21
Send {F12}
Sleep, 240000
Send {F10}

As you might guess, the first two lines make sure the SpectraVue program is active, the next line sends the F12 command to start, the program waits 240,000 milliseconds (4 minutes) then sends the F10 command to stop. Now all that's needed is to run the macro script on a schedule.

To create a scheduled event in Windows XP, go to the Control Panel and click "Scheduled Tasks." Double click "Add Scheduled Task" then browse to the AutoHotKey script file you created. Specify the start time, and make it a daily event. AutoHotKey will run with that script every time it's scheduled, and send the keystrokes to SpectraVue. Once the event is created, right click the event in the Scheduled Task window, click "Properties", then click on the Schedule tab then "Advanced". This lets you repeat the scheduled event every hour throughout the night.

This process provides an hourly schedule execution for SpectraVue recordings, and lets you enjoy nighttime top-of-the-hour ID chasing during the saner hours of daylight!

SDR-IQ Image Reception

I received the SDR-IQ over three weeks ago and have been having a lot of fun with it. The ability to visualize the spectrum really changes the way I listen to the radio.

One thing I noticed, though, is that my two local AM stations (1 kW @
1 mile, 5 kW at 3 miles) both show up as "images" at +/- 196 kHz from the fundamental frequencies. These images are down about 60 db, but that puts them at about the same signal level (-90 to -100 db) as most of the other stations I can pick up.

I posted a message to the SDR-IQ group on Yahoo but haven't heard from anyone else whether my experience is unique. More on this if I uncover anything new.

The Look of IBOC

Several stations seem to be broadcasting IBOC at 8:30-9:00 pm local (EDT) on June 14, as seen in the above graphic of the band from Spectravue as captured on my SDR-IQ.

The image shows 2 IBOC noise bands, one on either side of 760 WJR's carrier. As you can see, 760 itself is clean, but on the "far sides" of 750 and 770 carriers (e.g. lower sideband on 750 and upper on 770) the audio is "white" with a noise band 5 kHz wide. You can also see the same effect, albeit not as strong, around 840 (WHAS?).

What is slightly encouraging is that the sideband opposite the noise (e.g. lower SB on 770, upper SB on 750) are not as polluted by the IBOC noise; they are actually listenable despite the their other sideband being wiped out. The other thing I see is that the noise bands fade in and out at different levels from each other (sometimes only one is visible). Not sure why that is.

Anyway, this is what we will be looking at in the very near future on the US medium wave band.

SDR-IQ Day 2 Experiences

OK, I figured out what I was doing wrong when I play back recorded SDR-IQ RF files in Spectravue... you need to explicitely tell the program what frequency the recording was centered on when playing back. If the "Center Frequency" in the spectrum was 620 kHz, then you need to tell the program that on playback. I also noticed that, for some reason, the "Invert Spectrum" option was defaulted 'on' every time, so the frequency of the stations in the 190 kHz of displayed spectrum were inverted (e.g. if I was centered on 970 kHz, the next higher station would be 960 rather than the expected 980 kHz). Once you play with Spectravue for an hour or two, everything makes perfect sense.

I did several top of the hour recordings to see exactly how this all works. It was great fun to be able to go back and listen to the TOH IDs of 19 different AM stations as many times as I wanted, and adjust the bandwidth and mode (AM/USB/LSB) for each one. I fired up Total Recorder, and by picking the "software" audio input was able to record each of the stations' audio, as I listened, to an MP3 file.

I noticed some interference-like stuttering in the audio at various times, which seems to go away when I cut the spectrum down to 150 or 100 kHz from 190 kHz. I am using a 4-year old 1.8 GHz Dell desktop, and I am presuming that I might be taxing the processor/bus a little too much at the high setting.

(Update 6/17/07 - I moved over to a newer Compaq 3100+ Sempron machine and there are now no stuttering or gliches)

I'm happy with the SDR-IQ!

To learn more about the SDR line of radios, join the Yahoo Groups SDR-IQ or SDR-14

New SDR-IQ has Arrived!

(5/25/2007) I just received my new SDR-IQ software-defined radio from Universal Radio - it seems like they got a small shipment in, and I had been monitoring their website for the announcement. The version I purchased was just the bare board, not the complete unit mounted in a case (those seemingly are still waiting for FCC approval). Cost was $399, quite reasonable considering its capabilities.

The current link to the radio on their web site is: SDR-IQ

[UPDATE 5-26-2007: Universal announced they are sold out of the boards, and would have more later]

[UPDATE 9-7-2007: The Universal site no longer lists the bare board version anymore, but appears to have the complete SDR-IQ with case available on their web site]

I will be writing more about the SDR-IQ in the future, but was very impressed by its operation the few minutes I spent with it tonight. Most exciting is the ability to see the spectrum across 190 kHz of bandwidth in real-time, and the ability to record that spectrum to hard disk for later listening (as if it were live). I had a small glitch with the included Spectravue software on playback of an RF recording, as the frequencies of spectrum displayed were different from what I had recorded. But, I presume this is due to "pilot error" on my part, and I will work more with it in the coming days to see how it all works.

DX Tuners, RIP

This past week I received a sad email from Kelly Lindman, founder of DX Tuners (formerly know as Javaradio) in Sweden:


Dear DX Tuner Site Operator.

As you may be aware I founded and have operated DX Tuners with various people’s assistance for over 10 years with much satisfaction and fulfilment.

Regretfully, recently due to other business and personal commitments, I am unable to dedicate as much time or find as much inspiration as before in running the network and it is with much sadness and sincere regret that I have decided to wind up my business over here.

This has been a very difficult and emotional decision for me to take, having made many friends over the years, but after a good 20 years in the IT-business I feel the time is right to move on and try something else.

So basically I have two choices as I see it:

1. Get someone to take over the system including server and management.

2. Scrap it.

The second choice is not very appealing to me or anyone else, is it?
So...Is there anyone out there who you know would be able to run this system?
I will be more than happy answering any questions you may have.
I can give you a full description of the system upon request. Just email kelly@dxtuners.com


Today I have removed the ability to subscribe to the network. Hence there are no more subscriptions made. Also the Google advertising is removed.

New account creation works however and users get full access from day one as of now. The old subscribing system can easily be hooked on again if we find a new organisation for DX Tuners.

Please hang in with me as I hope we can find someone to take over the network as soon as possible.

Thank you for your consideration.

Sincerely
Kelly Lindman
DxTuners founder


That letter was followed, several days later, by this one:


Dear DX Tuner Site Operator.

I have briefly been looking for a replacement administration for DxTuners and I have gotten a few offers. Thank you! However, I have found the platform too complex running without my help, so it is with much sadness and sincere regret that I have decided to close down the network.

You are free to shut down your hardware at any point. There will be no stand alone solutions provided by me or my company as we are winding up the business.

I would like to thank you all for contributing to the network over the years. 10 years is a long time and some of you have been with me for most of that time.

Again thank you very much.

Sincerely

Kelly Lindman
Sweden


My node DX-Pennsylvania (running an Icom 718) went off line on April 20. Since then I have reformatted the hard disk of the machine that was controlling the radio (which was running Fedora Core 5 Linux) and have closed the firewall port to that machine.

If you want to see what DX Tuners was all about, use the Way-Back Machine and check out the site prior to shutdown:

http://web.archive.org/web/20060424095912/http://www.dxtuners.com/

Samsung YEPP: Another MP3 recorder for DXers?

It seems like it's getting harder to find solid state flash-based MP3 players that also include line-in recording capability. Recent posts on the AM DX email lists have focused on the iRiver models (see my posting on the T30). One unit I have used for portable DX recording is the Samsung YP-MT6. It is very small (less than 1" square, and 2.5" long), barely larger than the AA battery that powers it.

On the side of the unit there is a very nice LCD display with bright backlighting, and the controls (multi-functional, as on most electronics today) are easy to master. The unit features a built-in mic, handy for making field recordings, and a line-in encoding jack (which is unfortunately a small 2.5 mm size plug, not the standard 1/8 inch mini plug one would expect) means you can connect it to a radio for portable recording (I'd recommend using an attenuation cable if the line out of the radio causes overloaded recordings). It also has an FM receiver which, while not super-sensitive, will pick up most local stations in stereo or mono. One very nice feature is the ability to record what's heard on the FM tuner to the player's memory as an MP3 file. That makes it a lot of fun for recording FM stations while travelling. Finally, the unit can be connected to a computer via USB and the recordings transfered as it they were on a memory stick.

Oh yes, it also plays MP3 files quite nicely.

Check eBay, they tend to run in the $15-30 range for 512MB and 1GB sizes.

Total Recorder Tip #4 - Lost Recordings?

If you use Total Recorder for overnight, top-of-the-hour or DX test recordings, eventually you'll run into the case where the PC decides to reboot or accidentally turns off in the midst of a recording session (mine did during the Big Sky DX Test night, thanks to Windows Automatic Updates). If that happens, don't worry... more than likely you will be able to recover your recording fairly easily - just follow these steps:

1. Locate the TR "temporary" directory; by default in Windows XP it's in your user profile, and on Windows 98 it's likely c:\Windows\Temp. To check, in Total Recorder go to Options|Settings, click "Open/Save" and see what folder is set for temporary files. For example, on my system it is in c:\Documents and Settings\Local Settings\Temp (if you can't view the contents of that directory, in a Windows folder go to Tools | Folder Options | View and make sure "Show Hidden Files and Folders" is selected).

2. Look for some files of the form ~TRxx.zzz where xx is a letter/number combination and the file extension zzz matches your recording format. For example right now I have several TR sessions running and I see ~TRr1.mp3 and ~TRr2.mp3 since I am recording in MP3 format. If you were recording to "wav" format, the files would end in .wav. When you press the "stop recording" button in TR, or TR abnormally quits, these files stay in that directory with all the audio recorded up to that point. They don't get erased until you say File|New and choose not to save the existing recording (once you do that, though, they're gone).

Update 10-17-2009:

If you do accidentally hit "File|New" without saving your recording, all is not lost. The file still exists on your hard drive but the name has been changed to indicate it is a "deleted" file. DO NOT DO ANYTHING ELSE ON YOUR COMPUTER AT THIS POINT! Any actions you take (even surfing the web) can create files that will overwrite your recording.

Go to another computer and download an "undelete" utility that is compatible with your computer's operating system. I use NTFSUndelete which is a free application. Follow the program's instructions EXACTLY and, as long as nothing has overwritten the TotalRecorder temp file (which again will look something like "~TRr1.mp3") you will likely be able to recover the recording.


3. Rename the temporary files to something that makes sense (like 1460 kHz WXYZ Test 0200 EST 1-2-2006.mp3), and move them to a permanent location. You can listen to them like a normal audio file.

I would say I've had reason to resurrect lost recordings this way a half dozen times in the past year, once due to a family member being "helpful" and shutting my PC down before going to bed, several times due to power failures, and once (and only once on each PC!) due to Windows Automatic Update choosing to reboot my machine in the middle of the night after downloading the most recent updates!

Added 12-16-2007:

I found the following information on the High Criteria web site concerning lost recordings:


My computer suddenly shut down (locked up, re-started) while I was recording with Total Recorder. How can I restore the recorded audio from Total Recorder temporary files?

Go to Options => Settings => Open / Save. Now look in the folder assigned for temporary files. If the temporary files in this folder have .wav or .mp3 extensions it usually means that they are proper audio files.

If the temporary file has ".tmp" extension, it means that you cannot securely extract all recorded audio information from it. This happens because during recording process some information is stored in this file and some information in the PC's RAM.

However it is usually possible to recover most of your data which is stored in this .tmp file in PCM format. This file doesn't have a proper header so you can use our free application TRTmpRecovery (~65 Kb) to add a header. This program allows you to playback any file as a PCM file at different parameter settings (sample rate, 8/16 bit, mono/stereo), select the most appropriate parameters (if the file actually contains audio data) and add a proper header to this file. Once a header is added, this temporary file becomes a valid .wav file.

iRiver T-30: Partial Review

I picked up an iRiver T30 MP3 player/recorder on sale at Circuit City with some Christmas money this week; recent posts on the DX email lists, initiated by Bill Harm's request for advice on hard disk recorders, got my interest piqued. I thought the unit might be useful for portable DXing or DXing on the road. I had read review of the T30 online that mentioned this unit was worth considering. For $45, I felt it was worth a try.

Features: The T30 has 512 MB of memory, USB 2.0 connectivity, and works with Microsoft's orphaned Play For Sure DRM scheme (this was of no interest to me since I use an Apple iPod for my music listening). It will play MP3, OGG and WMA format files. It can record with a built-in mic (useful for lectures or conferences) and most importantly will record audio from a radio with a line-in input. This was my primary interest for DX recording. Unlike similar units it does not have a built-in FM receiver. My previous experience with FM radio MP3 players is that they are generally poor in sensitivity, so I did not see this as a detriment.

Form: The T30 is about the size of a pack of gum, 3" X 1" in a triangular shape, and came with headphones & USB cable, but no carrying case. It does have a wrist strap. Lack of a case was a concern, since the front of the unit is mostly a clear plastic display which I could see scratching easily - I found a case from an old USB hub that fit the T30 perfectly. The T30 uses a single AAA battery and reported having a 24 hour playing time on one battery. It can use alkaline or rechargeable batteries, and features a menu setting to chose which was in place.

Function: This is where I wish this report was complete, but I ended up returning the unit (hence the title "partial review".) The first time I plugged it in, it worked flawlessly - I could transfer files to and from it like a USB memory drive. I listened to some of my radio recordings from my PC with no problem. However, the second time I plugged it into my PC, the player froze up and I couldn't find any of the MP3 files on it. The only way I could reset it was to remove the battery. Every time I plugged it into the computer it froze again. I did not try to record to it, so I cannot report how well that worked. Whether this problem is unique to my PC or a more pervasive problem with the unit, I don't know.

Hopefully, there are other portable units that might fit this price/form factor in the future. If anyone has any suggestions, please post them in the comments. Maybe the new year will bring another MP3 recorder for consideration??

Total Recorder Tip #3 - Simultaneous recordings using same input device

As related in TR Tip #2, you can't record from two inputs on the same sound device (e.g. Line In and Mic) simultaneously. However, as related in TR Tip #1 it is possible to run two (or more) instances of Total Recorder simulataneously and it will record the same audio input device with different instances of the TR program. For example, if you have a scheduled timer set to go off at the top of the hour for the sound card Line In, but you are already recording audio from that input using the program, the TR Scheduler will fire off at the appointed time and capture the same audio; no conflicts will occur. This is nice since occasionally I accidentally leave TR running while I have the radio set up to capture overnight top-of-the hour IDs. Yes, I get two copies of the audio, but at least I don't lose anything.

Big Sky Montana DX Tests (Part 2)

(continued from Part 1)

Before I went to bed I did a level check on all the inputs from the radios to make sure the signals into the sound cards would be high enough to yield good recordings without overdriving. Nothing worse than a completely distorted recording to ruin things (on Total Recorder, I like to set the inputs so the VU meter level comes up 25-30%, never going into the yellow).

Since I was going to start the recordings when I went to bed (rather than fool around with setting the timers to automatically start the recordings) I checked to make sure there was enough free hard drive space to hold the recordings. For the length of these recordings (about 8 hours each) I figured I would need about 100-150 MB of space per recording. Across the three computers this wasn't a problem.

I wish I could have stayed up all night to listen live and chat on the #mwdx IRC chat on the Starchat network. Apparently there was quite a group gathered there, exchanging real-time reports. This is especially useful when DXers close to a target station can report what they are hearing - it can give those further away clues on what to listen for, and possibly pick out the target from interfering stations. Email lists like the IRCA, ABDX, AM-DX and DXHUB also were buzzing with real-time reports as the tests unfolded.

What became obvious the next morning, after reviewing the overnight email traffic and IRC log, was that KEIN, KLCY, and KGVO did not participate in the test. As a result, I did not review those recordings, although I still have them and may review them some point in the future to see what other interesting DX I may have picked up. The two most widely heard stations appear to have been KKGR on 680khz, and KERR on 750khz which did not run any Morse Code or sweep tones. I reviewed my recording of 750 but only heard WSB Atlanta which dominates that frequency from my location plus occasional Spanish that I assumed was Cuba. Had I been DXing live, I may have been able to phase them out to hear KERR. Bill Harms, who lives about 150 miles from me, was able to ID KERR several times. While 580 KANA was heard by some DXers with sweep tones, they didn't appear to make it to my area so I didn't check that recording, either. That left 680 KKGR as my only hope.

Imagine my horror when I went to the computer which had been recording the Icom R70 tuned to 680, only to see the Windows XP login screen rather than the desktop with Total Recorder running. What had happened???

(to be continued...)

iSound WMA/MP3 Recorder Professional - an alternative to Total Recorder?

Mark Connelly, well-known DXer in the Northeast US, recently posed a question on one of the MW DX email lists wondering if anyone had ever used the iSound recording software from Abyss Media for radio recording. I had never heard of it, so I downloaded WMA/MP3 Rec Pro yesterday and did a quick test drive. I find it to be very similar to Total Recorder, with an updated user interface. The scheduler works in a very similar manner as TR's. One slight difference is that the interface of WMA/MP3 Rec Pro displays the line in audio level all the time, as opposed to TR which only shows line levels while recording. WMA/MP3 Rec Pro did not require configuring MP3 recording, so that made installing a bit easier.

BTW, Corey Deitz reviewed Total Recorder Pro at http://radio.about.com/library/weekly/aa012103a.htm
as well as iSound at http://radio.about.com/od/reviewsofpcsoftware/a/aa052404a.htm

I'd say WMA/MP3 Recorder Pro a reasonable alternative to Total Recorder, and they both have a reasonable registration fee ($18 for TR vs. $30 for iSound). I did not try to configure iSound to record from multiple simulatneous sources so I cannot vouch for whether it's as flexible as TR in that regard. But, it appears to be worth trying out the free demo version.

Total Recorder Tip #2 - Simultaneous recordings from different sound card inputs

You cannot record from two inputs on the same sound card at the same time with Total Recorder - for example if you try to initiate a recording from both the line input and the microphone input of the same sound card, you will receive an error when the second recording attempts to start. The only solution is to schedule the recordings from those inputs to occur at different times, or to use multiple sound cards in the computer (see Total Recorder Tip #1).

Total Recorder Tip #1

I highly recommend Total Recorder as the hard disk recording tool for DXers. The ability to schedule unattended recordings and literally fill your hard drive with hours of DX audio makes it indispensable. I've used TR for about four years and have upgraded (for free) to each new version.

You can have more than one instance of Total Recorder running simultaneously on your computer; this is handy for recording audio from two or more radios at once. To do this, you must have multiple sound card devices on your PC. This is easy to do in Windows XP - I use the motherboard sound (called "Intel Integrated Audio" on my Dell 4400), an ESS Maestro PCI sound card, and a Creative Labs external USB sound device called the MP3+. Since each is a different manufacturer's card, they all co-exist at the hardware and driver level.

Run Total Recorder as many times as needed; on each program click the "Recording source and parameters" button, make sure "sound board" is highlighted, and choose the appropriate sound board device. Also make sure you choose the correct input next to the "Use this line" button - I usually use "Line" input. Finally, you can save the various sound card input settings as presets, making it easy to select the one you want at any time. Just click the "save as" button next to the preset name, create a new preset, and save.

I typically have three Total Recorders running at any one time, with inputs from three different radios. This allows me to monitor one radio while recording from two others - very handy when the DX is hot and heavy.

Total Recorder costs $18 and is available from www.highcriteria.com

Big Sky Montana DX Tests (Part 1)

Like many medium wave DXers, I tried for the recent (19 Nov 06)
Big Sky Montana DX tests (link at DXTests.info web site) coordinated by Les Rayburn for IRCA/NRC and made possible through the efforts of the many people mentioned at the link. Over the past year I've added stations like 1340 WWNH-NH, 1360 WNJC-NJ and 1230 WODI-VA to my logs courtesy of these tests.

Since I like to mostly sleep at night, I will usually set up my computer to record the audio out of my radio using Total Recorder, a great little utility from High Criteria. That way, I can review the recordings at a more reasonable hour of the day and (hopefully) hear the station. Over the past few years I've used this automated unattended recording technique to add literally hundreds of medium wave and FM stations to my logs, without losing a wink of sleep. The older I get, the more appealing this becomes :-)

The recent "Big Sky" test presented an opportunity to hear Montana, which would be a new state for me at my location on the East Coast of the US. It also presented a challenge - how would I configure enough radios and computers to monitor several hours of broadcasts from *six* stations, all broadcasting simultaneously? The schedule of stations for this test was as follows:

KANA 580 kHz, 2am-4am EST
KKGR 680 kHz, 2am-4am EST
KERR 750 kHz, 2:05-2:58am EST
KLCY 930 kHz, 2am-4am EST
KGVO 1290 kHz, 2am-4am EST
KEIN 1310 kHz, 2am-4am EST

The first step in the process, which turned out to be the easiest, was to assemble the six radios needed. Since all the tests would be broadcast at the same time, I could not have a single computer-controlled receiver hop to the different channels. So, I dug around in my basement and found some extra receivers and ended up with the following lineup:

Realistic DX-394 on 580 kHz
Icom R-70 on 680 kHz
Drake R-8 (the "workhorse") on 750 kHz
Yaesu FRG-7000 on 930 kHz
Ten Tec RX-320 on 1290 kHz (my "graveyard monitoring" setup - more on that another time)
Icom R-75 on 1310 kHz

Out of the six radios, three are computer-controllable via RS-232 connections. However, for this test, I only had to actually control the RX-320 since it needs software to tune and adjust the output volume. All the others were controlled "by hand", set to their respective frequencies, then left on all night.

The next step was to figure out how to record six radio's outputs. Since I didn't want to get up in the middle of the night and turn on recorders, I used the Total Recorder software mentioned above. One my Dell 4400 WinXP desktop I have three sound cards - the internal motherboard audio, a PCI soundblaster compatible card, and an external Creative MP3+ USB soundcard. Total Recorder will recognize each as a separate sound input, allowing independent and simultaneous three-channel recording. I typically use the 32 kBit/sec, 22050 hz mono MP3 settings which give quite satisfactory recordings that take up about 300 kB per minute of recording.

For the next two radios I used an old Dell laptop running Win2000; I connected the left channel of the motherboard audio line input to one radio, and the right channel to another; I recorded this one in stereo. For the last radio, I dug up an old Dell 500 MHz desktop running Windows 98 and piped the audio to that computer. Finally - six inputs ready to record!

(to be continued...)

Introduction

Computer DX Nexus is my little corner of the web where I intend to explore the nexus or "connection" between computers and radio listening. My personal interests cover medium wave, shortwave, FM and TV DXing as well as utility listening, but currently am focused on using computers to automate and augment my medium wave ("AM band") DXing.

Some areas I intend to cover include:

• computer control of radios
• computer recording of radio audio
• software of interest to the radio enthusiast
• useful online tools and websites

Stay tuned!!

Brett Saylor