Tag Archives: QRP

Articles, Homebrew, Websites

The Das DereLicht QRP transmitter–A bright idea

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Make Magazine’s blog recently featured the Das DereLicht–a QRP transmitter made almost entirely from the electronic components found in within a CFL Bulb. The transmitter, was designed by Michael J. Rainey (AA1TJ) who was inspired while changing a defective CFL bulb in his kitchen.

For some reason, I began to wonder if it would be possible to build a QRP CW transmitter using the electronic components salvaged from this derelict lamp.

Indeed, I’m pleased to report that a perfectly serviceable transmitter may be constructed! The only additional components required were the quartz crystal, and four of the five components needed for the output lowpass filter. The resulting transmitter produces up to 1.5 watts on 80m.

Michael, thanks for creating such a cool, simple, little QRP project. I’m ready to (carefully) tear into an old CFL bulb and give it a try!

Articles, Satellites

Work a satellite–QRP style

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Clint Bradford, K6LCS, recently posted a link to his website on the HF Pack group. He has a great article about working satellites AO-51 and SO-50 from low power rigs. QRP HF rigs like the Yaesu FT-817–which have VHF/UHF–are ideal for this type of satellite work. This article is well written and contains good references. I should mention that Clint is an AMSAT Area Coordinator in California and uses this document in his presentations.

Links:

Homebrew, Morse Code

The perfect key to use when you’re in a pinch.

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I think this homebrew key by Laurent Dumas (F8BBL) is simply amazing. It’s portable, easy to make from spare parts lying about the house and can serve you well if you’re in a pinch. (Sorry, I just can’t use this pun enough).

Admittedly,  I think there would be some serious operator fatigue if you tried to use this key in a contest. But for emergencies–it certainly fits the bill!

If you can’t see the embedded video below, simply click this link.

Announcements, Kits, Portable, QRP Radios

NorCal 2N2/XX transceiver kits update

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Over half of the 2N2/XX transceiver kits have been sold. You’ll recall (see previous post) that these kits were first offered at Pacificon and have been sold online since then. If you are interested in building one of these kits, you should not wait to make a purchase. Go to NorCal’s website for details.

UPDATE — 12/01/2008

Please read the update below from Doug Hendricks:

Due to problems with the stability of the VFO in the 2N2 kits, we hav suspended shipping until the problem is resolved and we can figure out which parts to put in the remaining kits, and which parts to send out to those we have already shipped. Please bear with us. We will get it right. Also, please, please, please do not send us emails asking where your order is. Every order is safe, and will be filled, we just need time to take care of the problem that we found. Emails to me won’t help, nor will an email to James or Kathy or Dean or Jim K. Thank you for your understanding. 72, Doug, KI6DS

UPDATE – 12/16/08

Hendricks has started shipments again and fixed the VFO problem.  Read message posted to QRP-l below:

Finally there is some good news to report!!  James tells me that shipping
has resumed on the 2N2xx kits for those that were held up while Jim Kortge
solved the problems in the VFO.  Jim did a tremendous amount of work and
we now have the parts to fix the problem.  The kits we are shipping now
have the correct parts in them, and those parts are being mailed to all
who previously purchased the kits.  Please, please do not email and ask us
where your kit is or when it will be shipped.  We are shipping as fast as
possible, and hope to have all kits shipped before the 1st of the year
that have been ordered.  (Don’t you just love my sentence structure??  My
English teacher is rolling over in her grave.)

We will be accepting new orders sometime in January and it will be
announced here.  James, Kathy, Jim K., Dean and Ron are working like crazy
to get your kit to you.  Thank you for your patience and understanding.
Doug, KI6DS

Announcements, Kits

NorCal offering limited run of 2N2/XX transceivers

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The NorCal QRP club is offering a limited run of their PN2222 based analog transceivers. These transceivers are based on 10 years of prior K8IQY 2N2 designs–an evolution originating from a design contest, Wayne Burdick N6KR, one of the co-founders of Elecraft, proposed for the 1998 Dayton convention.

A total of 500 kits are available – 200 on 20-meters, 100 on 30-meters, and 200 on 40-meters. They are available at $125 each (or $225/two, and $300/three). Only 5 kits per order are available.

These kits will be available for order on October 14th.

–UPDATE 10-13-08 —

Doug Hendricks posted a 2N2/XX update on QRP-l–this includes significant changes to availability. Here’s his message:

Guys, in our excitement at getting the NorCal 2N2xx CW transceiver kits
out we didn’t think things through very well. Here is the problem. This
coming weekend is Pacificon, and all of us will be totally tied up on
Thursday, Friday and Saturday and part of Sunday. The number of kits
available is only 200 on 40 Meters, 200 on 20 Meters, and 100 on 30 Meters
and we will have to monitor sales very closely or there could be a huge
problem. We don’t want to accept orders and not have kits to ship because
they are sold out. We just don’t have anyone available to monitor the
orders.

So this is what we are going to do. We will take one half of the kits to
Pacificon to sell in our booth. We will save one half of the kits for
“Internet” sales, so there will be kits for guys who can’t get to
Pacificon. I really doubt if we will sell 250 kits at Pacificon, but I
might be wrong. Even if we do, there will still be kits for those of you
who can’t make it.

The window for orders will now be open at 7 AM on Weds. Oct. 21st. I
apologize for any inconvenience that this has caused, but it is the best
solution that we can come up with.

Hope to see you at Pacificon. We have a great lineup of speakers and lots
of fun planned. 72, Doug

Links of interest:

Kits, Portable, QRP Radios

Impressions of the Hendricks PFR3

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Photo courtesy of Hendricks QRP Kits

Dr. Bob Armstrong, N7XJ, did a nice mini review of the Hendricks PFR3–a truly portable field QRP radio. This is an impressive radio for at least 3 reasons:

  1. The kit costs a whopping total of $240 US. I don’t know where else you could find such a complete radio package (with built-in tuner and paddles) for that price.
  2. This radio (much like the Elecraft KX1) was designed specifically for QRP and specifically for field use–hence the major controls are mounted on top of the radio. No need to worry about a place to set your radio, just hold it in your hand (if using the built-in paddles).
  3. Looks like fun!

I got to play with a PFR3 and speak with a couple of people who had built them at the Dayton Hamvention this year. I was impressed with the radio’s ergonomics and tank-like feel as I held it. Though not a beginner’s kit, by and large people were very please with the ease of build. The instructions are pretty complete now that many people have built the PFR3 and given feedback to the Hendricks team. Check their site for updates and notices before you start construction.

I’ve heard of two people who have actually built this kit in one dedicated day of sniffing solder smoke. Not a task for the faint of heart, though–and I wouldn’t recommend trying this at home.  

I am in love with my Elecraft KX1 and this radio looks like it could be its (bright yellow) cousin. Way to go, Hendricks!
Some PFR3 Links:
If you have used the PFR3 and would like to share your thoughts, register on QRPer (see top tab) and leave a comment!