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121  eHam Forums / SWL (Shortwave Listening) / RE: Smart looking new receiver on: February 05, 2013, 03:39:50 PM
The CR-1 specs are really buried in that website:
---------------------------------------------
"Product Information

Introducing the New CR-1 Communications Receiver

The CR-1 is a small, low-power, ruggedly constructed radio receiver that is finding a niche in the world of SWL’s (short wave listeners) and amateur radio enthusiasts alike.

The CR-1 is a new Software Defined Radio (SDR) from the designers of miniature wideband signal intelligence receivers, developed for special-operations units, and rugged business-jet data-link transceivers.

The CR-1 SDR is independent of a host PC, using embedded digital signal processing technology providing a degree of portability  and performance previously unavailable  to the radio enthusiast.

As one potential customer noted: “It’s an SDR with knobs, keys, and a display!”

Frequency Coverage and Modes:

MW-HF: General Coverage: 500 kHz - 30.000 MHz

    User Configurable Band Key:
        Amateur Band Selections: 160 m – 10 m
        International Broadcast Bands 120 m – 11m
    AM-SSB-CW  auto-mode-selection (based on tuned frequency) with user-override.
    International Broadcasting: auto-select  AM - 5 kHz steps - cursor override
    Auto-Filter Width select with override: AM: 6 and 7.5 kHz kHz/SSB: 2.6 kHz/CW: 1 kHz
    Tuning Resolution (cursor control): 1 MHz  / 100 -10 - 1 kHz  / 100  - 10 Hz

VHF-UHF General Frequency Coverage:

    VHF: Continuous Coverage:  64.0  - 225.0 MHz
    UHF: Continuous Coverage: 437.0 – 468.0 MHz
    Automatic standard frequency steps for each band
    Cursor Controlled (override) Tuning Resolution : 1 MHz / 100 - 10 - 1 kHz

VHF-UHF Band Plan:

    Aircraft Band: 108.000 - 136.975 MHz, AM auto-select -25 kHz channel steps
    Amateur: 2 m, 1.25 m, 70 cm (upper portion starting @ 437.0 MHz); with user selectable standard frequency steps.  NBFM mode default with SSB-CW mode selects.
        Note 6 m (54 MHz) is not available.
    Marine & NOAA Weather Radio
    Public Service: 137.0 - 225.0: 12.5 and 25 kHz steps. NBFM default.
    FRS-GMRS 462 – 467 MHz , NBFM - 25 kHz Steps

Receiver Architecture

    HF: Dual conversion (VHF-UHF: single conversion) with low-IF , I-Q digital sampling, 32-bit DSP with digital audio CODEC

    DSP demodulation algorithms: DSB-AM, SSB, CW, WBFM, NBFM

    DSP scalable, fixed bandwidth channel filtering

Audio System –  (Digital CODEC)

    Speaker Driver: 0.8 W into 8 Ohm load
    Internal 2.5” diameter, Mylar communications grade speaker
    External monaural speaker jack (3.5 mm stereo jack - back panel)
    Headset Driver: 40 mW into 16 Ohms. (3.5 mm stereo jack - front panel)

Antenna Inputs

    MW-HF Port: 1000 Ohm – 3.5 mm jack (auto-detection)
    MW-HF Port: 50 Ohm – BNC (female)
    VHF-UHF Port: 50 Ohm – BNC (female)

Display

    64 x 128 OLED Display with EMI-filtered lens
    Readable outdoors  and manually dimmable

Power Inputs

    USB and 6-18 VDC – 2.1 mm diameter center pin (positive) jack

Power Consumption

    < 1.0 Watt

USB

    Mini-B –USB 2.0 Jack (powered):  Downloadable software updates from CommRadio Website

Mechanical

    Overall Size: 5.64” W x 2.43” H x 6.10” D (including knobs, jacks , feet)
    Weight: 1 lb – 12 oz
    Knobs: Machined Aluminum – Black Anodized
    Front Panel: Machined Aluminum – Powder Coated – Black semi-gloss
    Case: 20 Gauge Steel, Powder Coated – Black Crackle.

ESD Protection:  ESD Diodes: Antenna ports - Power Jacks - USB Port-Keys – Knobs

Hardware Design Limitations:

    The CR-1 is not controllable over USB by CommRadio or third-party software at this time.
    I-Q analog and/or digital IF signals are not ported to the rear-panel or accessible or at a standard sound-card sampling rate.
    Both of these options may be added, provided demonstrated interest

Software Demodulators Not embedded in the CR-1 at this time:

    Mono or Stereo FM broadcast Demodulator
    P25 or Trunk Radio
    D-STAR
    DRM

Always Free: Planned Software Upgrades:

    SW revisions and upgrades (improvements)
    FM broadcast demodulator (US and International)
    European Band Plans:  MW- 9 KHz Frequency Steps

Potential New Software Applications (provided free if they occur, but not guaranteed to all new customers in 2013):

    Spectral Display (across individual bands) – fast detect of band openings
    CW reader ported to display and over USB
    PSK-31 decoder ported to display and over USB.
    Tell us what you want.

Origin & Warranty

    Designed and manufactured in USA
    Limited 1 year warranty on parts – labor – workmanship

Warranty"


122  eHam Forums / SWL (Shortwave Listening) / RE: Smart looking new receiver on: February 05, 2013, 02:09:44 PM
So who in the heck is Don Moore N0HDX?

Let's see:

"It draws on my experience as a kid building Knight Kits, from my paper route earnings through currently owning a classic Drake 2B and a Zenith Transoceanic; my benchmarks for enjoyable, high quality short wave listening. "

Then he adds an hefty aluminum knob. And Voila, a cutting edge SDR radio!

From his Eham bio:
" I now develop commercial grade, aviation (VHF) transceivers and plan to intorduce [sic] a SSB rig hopefully in 2003/2004.

73, N0HDX, Don"

Anyone know this guy or anything about his background? Has a general class license apparently.

Here's some discussion on an SWL site:
http://swling.com/blog/2013/01/commradio-is-introducing-the-cr-1-a-new-tabletop-shortwave-receiver/ 

123  eHam Forums / SWL (Shortwave Listening) / RE: ferrite antennas for MW bands? on: February 03, 2013, 05:06:57 PM
FSL antenna=Ferrite Sleeve Antenna
http://www.dxer.ca/articles/92-gary-debock

There are videos on YT of these in action. Is anyone selling them? I understand all that ferrite rod is very expensive. Quite heavy too. 
124  eHam Forums / Misc / RE: The Kenwood 990. A new HF operating paradigm on: February 03, 2013, 10:27:40 AM
Quote
Google how our submarine fleet stays in communication. (And that fantastically long underground antenna system...)

Any sub communications experts here?

Am I correct that ELF radio only penetrates a short distance underwater so submarines must approach the surface to communicate.  Also helps that those communications stations around 25 kHz run enormous power. They (stations in N.Dak and Maine) are quite loud at my QTH even using a sound card as a receiver.
125  eHam Forums / SWL (Shortwave Listening) / RE: LYQ Navigational Beacon coming in strong on 530 KHz. on: February 01, 2013, 04:06:36 PM
Has the LYQ beacon in Tennessee on 529 kHz shut down?

I haven't heard it for some time. A longwave group post said LYQ was considering shutting down. And I've carefully listened for it the past two days.

The ham who owned it considered it to be more of a service to SWLs and hams from what I could understand. NDBs are pretty obsolete as aircraft navigation devices.
126  eHam Forums / Software Defined Radio / RE: Another FlexRadio Systems SmartSDR Video has been released on: February 01, 2013, 11:51:16 AM
You can also see videos of a perfectly functioning 5000, like mine, demonstrating the Flex RF Tracking Notch Filter. Quite incredible if you haven't seen it.

http://www.youtube.com/watch?v=t17ipMS8gAk
127  eHam Forums / SWL (Shortwave Listening) / RE: IAC SWL antenna on: January 30, 2013, 03:19:42 PM
Here's what they say about the SWL version:

http://iacantennas.com/13-120-Meter-SWL-Broadcast-Bazooka-Antenna.26

HuhHuh?

"•Since this antenna has no exposed metal wire static charges can not build up hus reducing noise by 6 dB over antennas constructed of exposed wired"

So wire antennas such as dipoles ought be plastic coated? Hmmm. I worked 350 countries without knowing that!


128  eHam Forums / SWL (Shortwave Listening) / RE: IAC SWL antenna on: January 30, 2013, 03:08:55 PM
I glanced at the IAC website which makes no performance claims for the SWL antenna. Exactly what is that antenna supposed to do better than a long random hunk of wire (over all those many bands)?

The subject of Bazooka antennas comes up on eham occasionally. Here antenna expert W8JI and others talk about them;

http://www.eham.net/ehamforum/smf/index.php?action=printpage;topic=79314.0
129  eHam Forums / SWL (Shortwave Listening) / RE: Remember SWLing when it was fun? on: January 30, 2013, 06:49:55 AM
"1.  Radio Moscow used to send you "awards"?" Don't know about you Komrad but they never gave ME any awards. Smiley

---------------------------------------------------------------------------------
- Others listened to Radio Moscow; I ONLY listened to Ronald Reagan on TV Smiley

- You built the receiver you used

- In my case the above receiver ONLY picked up CHU Canada

- Re-tuned the family AM radio above and below its intended range

- You pretty much got electrical shocks from everything

- You knew nothing about antennas - No one knew anything about antennas

- When you owned zero test equipment or tools

- Only electronic genius you knew was the TV repair guy

- Took bus to ham/surplus stores

- (If ham) lived in utter fear of the FCC. I actually got two Pink Tickets. (Heath VFO, ya know)

- Bought replacement tubes at Walgreens

- All the good AM stations began with "X."

- Local AM (KWK in St Louis) ended the scourge of Rock n Roll with this:
[ http://www.youtube.com/watch?v=N92bt6W30UI ]
130  eHam Forums / Hamfests / RE: ARRL Midwest Convention November 2013 on: January 26, 2013, 10:11:00 PM
I'm old enough to remember when those conventions would take over the Chase Hotel here, once the finest hotel west of Chicago.

Congrats to the Lebanon radio group. Heck, that facility looks better than Dayton. The location isn't far from the Lake of the  Ozarks and Branson.
131  eHam Forums / Hamfests / RE: ARRL Midwest Convention November 2013 on: January 26, 2013, 11:11:39 AM
"It will be held in November 2013 in Lebanon, Missouri."

Now I live in St Louis MO and my first question: Where the heck is Lebanon MO?  By car it's 150+ miles away from me, down hwy 44, and pretty far from Kansas City, too. Their convention center looks nice, at least. 

Guess the convention will be convenient... for the 14,000 people who live in Lebanon Smiley
132  eHam Forums / Antennas and Towers and more / RE: Zero-Five vs. DX-Engineering 43 ft - Build Quality on: January 26, 2013, 06:45:09 AM
Quote
"What do you do when using the DX Engineering plate when the bolt (that's never been removed) hangs up in the groove on the plate while your in the middle of walking the antenna up or down?"

Happened to me quite a few times with my DXE plate in the 3+ years I've had the antenna.  Replaced the bolts several times. Much easier to happen with their 43' verticals than with small verticals, like a Hustler. You do get better with practice. Best to use two people and wait for a calm day.
133  eHam Forums / SWL (Shortwave Listening) / RE: in apartment swl antenna (aka aerial) on: January 24, 2013, 12:26:33 PM
I lived in about the tallest high rise apartment building in St Louis for many years. Luckily I had a nice balcony on the 18th floor and windows that opened. Radio signals did not penetrate it. I actually spoke (on the air)  to a ham who was a main design engineer on its construction years before. He assured me it was VERY well built from concrete and steel beams. I've lived on the south side of the building. You could hear almost nothing from the north.

In such a building you'd probably be best to tape wire along a window or use the metal window frame.  Who knows how a loop would work near metal beams hidden in concrete? Or even closer to metal lath in walls?

The trick is to experiment. Yes, a piece of wire out a window may work as well as anything.
134  eHam Forums / SWL (Shortwave Listening) / RE: in apartment swl antenna (aka aerial) on: January 23, 2013, 06:44:13 AM
You're providing almost no info.

What frequencies and services are you most interested in? Do you currently live in this apartment?  Main goal of an apartment antenna is usually to reduce man made noise which is often the major limiting factor. Can you run a simple thin wire out a window? What floor in this apartment are you on? What kind of receiving equipment will you use? If it is a tall building, what is is made from? 
135  eHam Forums / Elmers / RE: How much of a help is 6 DB? on: January 18, 2013, 02:51:14 PM
Quote
But to condense it: 6 DB = 1 S unit

That may have been true 60 years ago. On my TS-850 I came up with an S-unit being about 4.7 dB and only on the middle portion of the scale.  Difference between say S-2 and S-3 was much less. And I was only testing on 40 meters where I was trying to get an accurate determination of the performance of my array of phased verticals. S-meters can vary by band or even by frequency within a band according to one article.
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