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.