In exchange for sharing a photo of your favorite listening post or your radio shack with the SWLing Post community, you’ll be entered for a chance to win a Grundig G2 portable radio/recorder and player! The choice will be made by random selection, so everyone has an equal chance of winning.
Yesterday, Tony (K3DY), shared a video (via Twitter) demonstrating his new home brew loop antenna and amplifier.
This is actually a great demonstration of how even a relatively simple, inexpensive loop antenna can improve reception in locations with heavy radio interference. Tony includes the following notes with his video:
“Testing a new receiving loop antenna that I built today. It uses a pre amplifier based on deferential setup of two 2N5109 transistors. Loop is made out of coaxial cable, only the shield is connected to the circuit.
Quick demo on 31 meters, lots of stations at sunset time. No time for further testing but I observed a pronounced directivity below 7 MHz. 75 meters is so quiet that it makes me forget I live in a townhouse. As a comparison, my noise level on 75 meters is at S8 on an end fed [antenna].
I will use this loop primarily for SWLing purposes but I may use it as a separate receiving antenna with my amateur radio equipment.
A lot of fun, loops are fascinating and efficient!
Indeed, Tony! And perhaps the icing on the cake is that loop antennas are so portable, low-profile and easy to deploy. They’re ideal for those living in restricted areas and with picky home owners’ associations.
Inspired by my buddy Vlado (N3CZ), I’ve actually been collecting the pieces to build my own mag loop antenna this winter. I doubt the parts for my loop will exceed ten dollars as I plan to use the shield of some heavy coax for the primary loop and a little PVC for support (much like Tony’s loop).
Tony’s video is inspiring me to go a step further and also build a simple amplifier. Any suggestions or schematics for doing so are most welcome!
One thing has stayed with the James Bond movie franchise through the decades: Mr. Bond always has the most wonderful of gadgets. Be it handheld, car-based, or otherwise, there’s always something to thrill that is mostly believable.
The biggest problem with all of those gadgets is that they mark Commander Bond as an obvious spy. “So Mr. Bond, I see you have a book with many random five character groups. Nothing suspicious about that at all!” And we all know that import/export specialists often carry exploding cufflinks or briefcases full of unknown electronics in hidden compartments.
Just as steganography hides data in plain sight, the best spy gadgets are the ones that don’t seem to be a spy gadget. It is no wonder some old weapons are little more than sticks or farm implements. You can tell a peasant he can’t have a sword, but it is hard to ban sticks.
Imagine you were a cold war era spy living in a hostile country with a cover job with Universal Exports. Would you rather get caught with a sophisticated encryption machine or an ordinary consumer radio? I’m guessing you went with the radio. You aren’t the only one. That was one of the presumed purposes to the mysterious shortwave broadcasts known as number stations. These were very common during the cold war, but there are still a few of them operating.
Halloween is typically the most active day of the year for shortwave pirates…so, here are three things you’ll want to do this Halloween:
Listen for pirate radio stations this weekend! Turn on your radio anytime this weekend, but especially around twilight and tune between 6,800 – 6,990 kHz. Pirates broadcast on both AM and SSB; you’re bound to hear a few. For a comprehensive primer on pirate radio listening, check out this post.
If you’re a subscriber of The Spectrum Monitor (TSM) magazine, you’re in for a treat this month: the November issue is the TSM annual Radio Buyer’s Guide.
Many SWLing Post readers know that I write occasional features and reviews for TSM. Since the November issue will feature my shortwave radio buyer’s guide, I was sent a draft of the November issue. After double-checking my review, I thought I’d glance through some of the other articles–what a rabbit hole that was! Two hours later and I’m still reading. Since I’m primarily a shortwave guy, TSM expands my horizons with articles about parts of the spectrum I seldom explore. That’s a good thing!
TSM Publisher and Managing Editor, Ken Reitz (KS4ZR), has done an amazing job collecting a group of writers who are not only experts in their respective fields, but are effective writers as well. These two qualities do not always go hand-in-hand.
Beginning November 14th, 2015. PCJ Radio International will offer a series of special broadcasts before the end of the year for listeners in Europe and Southeast Asia.
Time: 0900 to 1000 UTC
November 14th – Say It With Music
November 21st – Call it Ukraine
November 28th – Rockin’ with Raoul
December 5th – Classics with David Monson
December 12th – Special Jazz For The Asking
December 19th – European radio during WW2 (documentary)
December 26th – Special listeners programs
Each of these special transmissions will have a special E-QSL.
I’ll admit it: I’m a bit of a handheld radio snob.
I don’t own many HT transceivers, but the ones I do own are manufactured by the “big three”–namely, Yaesu, Kenwood and Icom. For ages, these three companies dominated the handheld radio market.
A few years ago, several Chinese radio manufactures (Baofeng, Wouxun, TDXone and TYT to name a few) started flooding the market with inexpensive handheld transceivers–radios that literally cost a fraction of those produced by the “big three.” Where a Yaesu dual band handheld might cost between $150-250 US, a Baefeng model might cost $25-50 US.
As one might imagine, these inexpensive transceivers gained quite a following in the ham radio community and with preparedness/communications enthusiasts.
I’ve read that many of these ultra-cheap transceivers are difficult to program and I’m sure that’s one of the factors that has kept me from purchasing one.
I also assumed that a $25 radio must be very poorly constructed. Seems I’m incorrect at least on this point.