A Pixie by KE3IJ Rick Andersen
The Pixie is a mimimalist amatuer transceiver, It has a transmitter and a receiver and will work very well on a 9 volt battery even better
on 12 volts [8 AA batteries]. If you click on "Pixie" above the schematic you'll find a PDF file by KE3IJ Rich Andersen. This is his design.
The method of construction here is called "Manhattan" basically. Some call it "ugly construction" and some call it "dead bug".
It really dosen't matter that much what it's called. The results are generally the same.
You build a tranceiver [radio] with out benefit of a manufactured printed circuit board [PCB]. Here I've built the oscillator circuit.
I've "smoke tested the oscillator and is has a nice stay strong tone. The heart of this little radio is the oscillator.
I hi-lite the areas to lessen My confusion should I have to leave during the construction. I am able to come right back to where I left off when I left
This circuit is the PA [power amplifier] it transmitts a 1 watt signal when using 12 volts this less power than your standard night light.
It also has a Band Pass Filter[BPF] that filter out the harmonics of your transmitter.
here is the completed work so far.
Now the audio pre amplifier. I had to stop because I needed some parts.
pink hi-lites showes those parts I was waiting for. "Q3 & Q4" is the Audio preamplifier.
700 hertz CW filter is "Q5".
Audio amplifier is "Q6".
The telegraph key is connected here.
I can only hope this "1k * vary" means a 1k volume gain control.
"ANT" is of course the antenna hook-up.
The "AF" designates the Auio Frequency output.
All the components have been built into the "Pixie". I need to hook everythiing up and do a smoke test.
The white wire is the signal line and the red is the B+ [power] line.
Great news. The smoke test failed. No smoke was released. I hooked it all up then applied power. In this case a 9 volt battery then keyed the transmitter.
My WM-1 watt meter indicates 600mw [0.6wats]. I won't guarantee its accuracy.
I monitored the test with my K2. I could hear the oscillator when power was applied the when the transmitter was keyed
the received signal on the K2 increased dramaticly. The Pixie was transmitting into a dummy load.
The test was repeated with a 12 volt battery pack. Indicated power out was in the neiborhood of 800mw.
Basiclly the RixPix is finished. But lets see what can be done about a case?
Here's the sides, front & back along with the connectors I might need.
A brass nut soldered to one side to hold the top. Front of case attached.
Front and Rear Panels now connected.
Side panels attached.
Connectors have been installed.
Front and Rear views.
Inside view of Front and Rear panels.
RixPix 3.58 has been completed.
72 de RC kc5wa