Low-Cost Pixie Transceiver Kit

The Pixie transceiver is a simple QRP amateur radio transmitter design. I earlier blogged about and made a YouTube video covering QRPME.com's version of this design, the Lil Squall.

I recently picked up one of the inexpensive Pixie kits that are sold on eBay. This one was only US$6.80 with free shipping, so I thought I would take a chance and buy one.

After a few weeks waiting for shipping, it arrived. The kit includes a nice silk-screened and solder masked PCB and all parts and connectors including a 7.026 MHz crystal and a 2 Watt 47 ohm resistor for use as a dummy load.

It needs headphones, a code key or keyer, and antenna and power source. It runs on 9-12 VDC and puts out about 600mW of RF power.

It went together in less than an hour and worked when I powered it up. It uses one IC, two transistors, and fixed inductors (no toroids to wind). The parts are all through-hole. The board is a little tight with some parts mounted vertically. It came with two sheets of instructions - basically a parts lists and a schematic - which was adequate to figure out how to put it together for someone with some experience with electronics.

On transmit I measured 240 mW at 9VDC and slightly less than 600mW of RF power at 12VDC into a 50 ohm dummy load.

The transmit frequency is fixed by the crystal, but the receive frequency can be adjusted slightly using a potentiometer. You could use different crystals but the circuit is only intended for the 40 meter band with the parts supplied.

As is typical with this design, this is not an easy rig to make contacts with due to the lower power and fixed frequency. The receiver is also not very sensitive and can suffer from AM broadcast band station overloading. A preamplifier, like this Ameco unit, can help a lot.

The one I bought was listed on eBay as "HAM RADIO 40M CW Shortwave Transmitter Receiver 7.023-7.026MHz QRP Pixie Kit DIY".

All in all, a fun little kit for the price.

Lil Squall ][ Transceiver kit

My latest kit building project is a Lil Squall ][ from qrpme.com. This is a QRP (low power) ham radio transceiver kit that, like most of their kits, is mounted on a tuna tin.

It is based on the Pixie II transceiver design which has been around for a number of years. It is a very minimalist CW (Morse code) transceiver that uses only three transistors and one IC.

I will be making a youtube video about the kit shortly.

Some pictures are shown below.

HW-16 Restoration Complete

I've finished restoration of the Heathkit HW-16 transceiver. It needed the power supply caps and resistors replaced (a couple of the resistors were open). A cap kit from HaySeed HamFest Co. did the trick.

The 6GE5 final tube also had an open filament and needed to be replaced. The last problem was an open RF choke which I was able to fix. After doing the alignment, the receive and transmit functions are working fine. I even hooked it up to my HG-10 and confirmed that it works using an external VFO.

The only remaining task is to possibly get a vinyl overlay to replace the front panel. Hayseed Hamfest is not currently manufacturing them but is planning to resume soon.

I'm currently making a YouTube video that will show the unit operating and discuss the restoration in more details. I'll post a link here when it is available. Update: The Youtube video can now be found here.