Pixie2 sections

Q1(2N3904) is oscillator using XTAL that connecting to Q2 with C3(82pF). Q2 is mixer between the frequency Q1 and input from antenna. There is the bandpass filter between antenna and Q2 collector. The bandpass filter is C5/C7 (820pF) and L3 (22 uF). Frquency is 1/(2*pi SQRT(LC)) that is7.445 MHz. There is the capacitance C5 (0.01uF) between antenna and Q2 collector to cut the DC effect between Q2 collector and antenna.

Mixer output appears at the Q2 emitter. It's connected to LM386 through C8 (0.1uF). This is the direct conversion receiver, therefore, LM386 should amplify audio freqency with the voltage gain(46dB). D1(1N914) is a diode to prevent current follow to pin 6 on LM386. For pin6 on LM386, DC at +9V DC is supplied through R1 1KOhm. C10 10uF is the purpose to be stabilized at +9V DC. There is 4-7V DC which depends on the current amount to pin 6 on LM386.

C4 is the simple low pass filter beyond the audio frequency. R4 keeps the DC voltage for the Q2 emittor.

Pixie2 schemantic

I've found the pixie2 schemantics on the we6w's homepage. It is very simple. There are two transistors of 2N3904 and one IC of LM386. Although it's simple, it's a transceiver with a full break-in function.
Power supply is +9V DC and you can use 006P 9V battery for this supply. Crystal in the original schemantic has been equipted, therefore the frequency is fixed for transmitter and receiver. You need to have the RIT for the compatibility of other stations frequency. In addition, the following items are needed:

• VXO to coverage on the range of CW frequency
• Sidetone to hear the CW sending tone

I am investigating to need other additional items for the opeartion. It's the schemantic on May, 1995 and becomes difficult to get information.

pixie2 is started

I am trying to get information on pixie2 for building QRP transceiver. Product review by eham is vary. Some people is rated at 5 but some people is very lower rate.

The kit is sold by HSC Electronic supply at $9.95, but I would like to make it by myself from the parts.