The 'PSK-10 '
A PSK31 transceiver kit for 10 meters!

    This design is a variant of the 'PSK-20' design originally published in June 2000, QST magazine. It features an all new printed-circuit board and hotter driver and PA transistors for robust power output on 28.120 mHhz.  This transceiver may be used by Novice and Tech+ license-holders.  
   

SPECIFICATIONS:

Double-sided PCB 5.27" x 4.6", plated-thru-holes, solder masked/silkscreened for easy assembly
- 3W PEP output
- interfaces with your computer's soundcard. NO SERIAL INTERFACE REQUIRED!
- detailed 25 page Technical Manual for Assembly and Alignment Instructions,
- All on-board parts supplied in kit (as pictured aove)

- add a computer and a 10m antenna and you'll be on the air with PSK31
- no drift, no VFO tuning, no muss, no fuss!

 

So....is there life on 10 Meters? Yes! The image below is a screen capture taken when I hooked up the PSK-10 recently. This image was taken midday during the week- band occupancy is somewhat busier on weekends..

10M activity

 

The mouse cursor has been clicked over one of the signal traces appearing on the waterfall display and the signal's decoded text appears in the upper window. To transmit, you type text into the lower window and mouse-click on a 'T/R' menu button to send. What could be simpler?

10 meters is a great band for working DX. I routinely talk to stations in Europe and South America with the PSK-10 and a dipole, and during this portion of the sun's 11-year solar cycle, this band is open for DX contacts during daylight hours.


PRICE: See 'Order Form'

Enclosure: The enclosure kit matches that of the PSK-20 design and is available in a handsome medium grey. It features a high-quality Lansing Instrument Corp. extrusion enclosure, and the printed-circuit board slides right into rails on the extrusion base. End panels and bezels are included, of course, and the new custom end panel for the PSK-10 has been tailored for this design's simplified complement of connectors. The enclosure kit is $30.
  


"Manual" -- Download the PSK-10 manual -- (325 KB)    


-FREQUENTLY-ASKED QUESTIONS-

"What skills do I need to complete this kit successfully?"

I assume you can solder (the instructions provide a 'refresher' and I assume you can distinguish the common types of capacitors. The instructions are otherwise complete- the step-by-step instructions will guide you through the assembly process!

 

"What test equipment do I need?"

You'll need a HF wattmeter- the instructions call out a $30 Radio Shack SWR/Wattmeter which is perfectly adequate for this project. Comparably-priced meters (e.g.MFJ) are also suitable.

It's also helpful to have another amateur rig (or frequency counter) to adjust a trimmer to provide accurate frequency calibration. Lacking this, the adjustment may be made by setting the trimmer for maximum on-screen PSK31 activity. All other adjustments are 'tune-for-maximum'. The alignment procedure is straightforward and is contained in the instructions.

 

"What else do I need to complete my station?"

- A PC (Pentium or equivalent- 100 Mhz or better) with soundcard. The PSK-10 interfaces with the MICROPHONE IN and LINE OUT jacks on the back of your computer. You supply a pair of standard 3.5mm stereo soundcard cables- available at your local electronics emporium.

- The Software for PSK31 operation is available FREE on the Internet- A URL for the very popular 'DigiPan' software is called out in the manual and elsewhere on this website (see 'PSK-20..'). DigiPan assumes a Windows95 (or newer)operating system, but other applications are available for Linux and Mac, for instance

- A 12 to 15V regulated DC supply capable of delivering at least 1 Amp of current. The instructions call out several popular candidates. Note that the garden-variety 'wall-wart' supplies are typically unregulated and are not up to the task. The PSK-10 kit includes a power plug and 2' of cord to connect to a power supply.

-A 50-ohm nominal antenna for 10 Meters. At its simplest, this is a dipole antenna measuring 16'8" in length and fed at the center with 50-ohm coax such as RG-58/U or RG-8/U. There are also a variety of vertical antennas available commercially.

 

"What if I run into trouble?"

Small Wonder Labs will answer your e-mail inquiries promptly. I recognize that I can't anticipate every possible question in the instructions, and your feedback helps me improve the product. Parts shortages are resolved by immediate shipment of make-up parts.

If you run into trouble during alignment and test, I'll guide you through the troubleshoot process as far as we can get by e-mail. If that doesn't do the trick, my repair person offers prompt and reasonably-priced service- he'll troubleshoot and repair the unit and let you know what he found.

 


Dave Benson, K1SWL
Small Wonder Labs
4/26/02