Tag Archives: Regenerative Receivers

Video: EB3DYW’s Homebrewed regenerative receiver

While browsing a videos on YouTube, I stumbled across this demonstration of a brilliant little homebrewed regen receiver by Javier Guillaumet (EB3DYW):

Click here to view on YouTube.

What a beautiful little receiver!

Though I’ve build a number of receiver kits, I’ve never built one from scratch. Someday, I will muster up the courage and do so, though!

If you like home-grow regen receivers, you must check out Dave Richards’s Sproutie II regen receiver as well. A true work of art!

Post readers: Do you have any homebrew projects to share? Please comment!

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The KRC-2 shortwave regenerative receiver kit

KRC-2 shortwave regenerative receiver kit1

Tony Westbrook recently contacted me about a regenerative receiver kit he has designed and produced in the UK.  It’s called the KRC-2.  Here’s the product description:

1 – 30 MHz with band spread tuning.

Regeneration with a difference. The regeneration setting on the KRC-2 is unaffected by the receiver tuning or the antenna coupling. How do we achieve this? The regenerative stage is fixed at 10.7MHz and used as an IF amplifier. The main receiver board is extremely simple to construct using only one FET and an audio IC. Like all the KRC kits it comes with a comprehensive construction manual which brings this project well within the grasp of the keen constructor. It was referred to as “a very sensitive little receiver” by Rob Mannion of Practical Wireless. Its unconventional design and simplicity should amaze even the experienced constructor. Case size 7 x 4 x 3 inches. 6 x AA batteries supplied.

According to Tony, the kit comes with everything; UK orders are even supplied with batteries. Tony stated, “the only thing the customer needs is a soldering iron, solder cutters, etc.”

By request, Tony sent a few construction photos and three videos of the radio in operation:

Photos

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Videos

Video 1

5.505mHz Shannon Volmet

Video 2

17.650mHz CRI

Video 3

21.505mHz Radio Saudi

Click here to view the KRC-2 and Tony’s other kits. 

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Dave unveils the Sproutie MK II regenerative receiver

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My talented pal, Dave Richards, has built yet another home-brew regenerative receiver––which he dubs the Sproutie MK II––and wow, it’s a thing of beauty.

Dave tells me has been working on this receiver for many months, and upon viewing the following photos of it, it’s clear to see why he took his sweet time. As in his original Sproutie, a vintage HRO dial has taken pride of place as the centerpiece of his rig; it looks stunning.

But the Sproutie MK II is not only painstakingly-crafted on the outside; like Shaker furnishings, wrought for the eyes of God both outwardly and within, the interior of Dave’s receiver is equally well-crafted.

Okay, maybe that’s a little over the top…but if you doubt me, just join me in admiration of this board:

SproutieMKII-board

As for performance?  Of course, with such a clean interior, the Sproutie II performs like a champ.  Dave posted a few videos showing how his new receiver commands the airwaves and aptly handles AM, SSB, and CW.

That’s an amazing piece of kit you’ve created there, Dave!  Hats off to your incredible craftsmanship.

Check out Sproutie II on Dave’s blog, where you can read a full account of how he designed and built this gorgeous regen receiver.

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Video: Dave’s “Sproutie” home-brew regenerative receiver in action!

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My good buddy, Dave Richards (AA7EE), has just posted videos of his home-brew regenerative receiver–nicknamed “The Sproutie.” [You may recall an earlier post about this very receiver.]

Below, you’ll find a video where Dave tunes in broadcasters with The Sproutie–she certainly has ears!

Dave, that’s a simple, beautiful little radio you’ve built there.  I love the HRO knob–form and function at its best.

Readers: be sure to check out Dave’s full post about the Sproutie along with another video. If you haven’t yet, bookmark Dave’s blog–it’s a good one!

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The Ozark Patrol regenerative receiver kit

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Just learned that David Cripe (NM0S) has a new kit for sale: the Ozark Patrol regenerative receiver kit.

The Ozark Patrol is a simple, straightforward kit, designed with beginners in mind. The kit uses through-hole components, which is to say, mounted on pads etched on the opposite side.  All of the component values and reference numbers are silk-screened on the board to indicate each part’s location, making for truly quick and fool-proof assembly.

What’s more, Dave is a talented kit designer; he’s the brains behind the kit for our successful ETOW HumanaLight (originally conceived by engineer Greg Majewski). He’s not only clever like that, he’s also a great pal.

In the past, when Dave has announced new radio kits for sale, he’s sold out within a few days. That’s why I ordered mine the moment I saw the announcement.

And, hey…not only does just $40 plus shipping ($46 in the US) get you a superb regen receiver kit, but proceeds also support the Four State QRP Group. Win-win, in my book.

Here are a few specifications and design features listed on the Four State QRP Group’s website:

  • Frequency Range: 3.5-15 MHz in two bands
  • Sensitivity: Yes!
  • Power Supply: 6 x AA batteries
  • Audio Output: A 2.6” speaker is included, as well as a jack for 1/8” stereo headphones

Want one, too? Click here to order your own Ozark Patrol kit…and enjoy tinkering as well as listening!

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How shortwaves keep you young…

Remember our recent posts about Dave Richard’s homebrew regenerative receiver?

If so, you can imagine the laugh I had yesterday when I viewed this latest creation by the infamous Jeff Murray (K1NSS):


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“Short Wave & Prosper”–? I have to agree!  And I’m completely in tune with Jeff’s sense of humor. If you are, too, be sure to bookmark Dashtoons for more radio fun and whimsy. (Better yet, get Jeff to design your own QSL card!)

As for Dave, follow his blog for the latest on his many homebrew activities (that continue even when his pets are interfering).

Major thanks to Dave for the brilliant write-up about Ears to Our World’s HumanaLight kit. [Want one? Get yours now at Universal Radio, and support ETOW’s mission.]

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Dave’s late night listening session

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My good buddy, Dave Richards (AA7EE), recently shared this message with his friends, many of whom do not know a lot about shortwave radio (yet):

“I’m waking up very slowly this morning – was up until 4:30am listening to the 49 meter shortwave band on a new receiver I’m building, dubbed “The Sproutie Regen” after my cat Sprout. “Regen” is short for regenerative, which refers to the type of circuit used in this receiver – it was developed by Howard Armstrong in 1915 and is 100 year-old old technology. Most of the parts are fairly new, with the exception of the tuning dial, which was made by a company from Massachusetts, called “National” – it’s probably around 50 – 70 years old, and the tuning capacitor, which is around 50 years old but had never been used. It was “new” in it’s box.

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It’s not finished yet – will look a bit more spiffy when it’s done, but these are what its bones look like. 49M was fascinating last night. I heard an American propaganda station broadcasting to North Korea (The Voice Of Hope), and being jammed by the DPRK, an American propaganda station broadcasting to Cuba (Radio Marti), a very low power broadcaster from Canada, as well as Radio Habana Cuba, Radio Australia broadcast in Pidgin, Radio China International, as well as the Chinese domestic radio service (which Mao Tse Tung wanted all citizens to listen to), and a host of other broadcasters from all over. It was a fascinating cornucopia of signals from our very diverse world – and all on a receiver I built myself using 100 year-old technology.

I had trouble sitting in front of the desk because Jingles the blind kitty had curled up on the circular cushion on the chair and was happily sleeping. I somehow managed to squeeze myself in next to her and she is still napping here on the cushion next to me.

JinglesThe BlindKittie

Dave’s cat, Jingles, in his shack.

I love these late night sessions. It’s just me, a cup of coffee, a shortwave receiver to listen to far-off lands, and a lovely little furry creature slumbering next to me. Perfect. As some people in this part of the San Francisco Bay Area might say, ‘my natural vibrations are perfectly aligned with the planets and receiving much abundance.’

As for me, I’m just having a good time, thank you.”

Like it, too?  Follow Dave, Jingles, Sprout, and all of his homebrew adventures via his excellent radio blog.

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