This is a four board set to build a 8W RF output CW 20 meter transceiver that is VFO controlled. The receiver uses a MAR-2 front end with a SRA-1 mixer in the single conversion receiver. The transmitter uses MAR-2, 2N5109, 2N3866 and MRF433. The unit is mostly built with transistors and a LM386 audio amplifier. Diodes are used for the antenna switching.
ARRL HANDBOOK CHP30 FIG.29 (QST 10/89)
This is a crystal controlled CW transceiver with separate crystals for the receiver and the transmitter. The transceiver is broad banded to cover 18 to 24 MHz. The receiver is built around a NE602 front end/ mixer, and two NE5532 ICs. The transmitter has five transistor stages with a MRF237 output device with 1.25 to 4 watts out depending on the frequency. The transceiver has a built-in audio sidetone.100
ARRL HB 95 FIG 17.86
This is a two board set that makes a CW transceiver that covers a 50KHz segment of any one of the bands between 80 to 20. Thus it only is a single band radio, you build it for the band you want. It has a superhet receiver and uses a 10.7 MHz IF. The receiver section is built around two NE602s, one MC1350, MPF102 VFO, with a LM386 audio output. The Transmitter has NE602 and four transistors with a 2SC799 final and delivers 1.5 Watts.
COMM QUARTERLY Winter98
The Twoer is a complete 2 meter 1 watt QRP AM transceiver with a tunable, single conversion, 10.7 MHz IF, superhet receiver and crystal controlled transmitter. The receiver uses a MFR901 preamp for .3uV sensitivity, a 10.7 IF filter, NE602 and MC1350. LM358, LM386, and TDA1015 IC's. The transmitter consists of three stages with an oscillator/tripler using a 48 MHz crystal. Other devices are LM358, LM386, TDA1015, and five transistors.
This is a two board project with the VFO/BFO on one board and the transceiver on the second board. The article describes how this single sideband transceiver can be built for one of the following bands: 160M LSB, 75M LSB, 40M LSB, 20M USB. The unit uses different VFO and IF frequencies for the different bands. The transmitter runs 1-2 watts with VN10KM and IFR510 transistors. The transceiver also uses (4) Ne602's, LM 386, LM741 and 7805 IC's.
Description: This is a single band QRP transceiver with an RF output of 4 to 5 watts that can be built for 80, 40,or 30 meter CW operation. The unit is crystal controlled, uses (5) 2N2222, 2N2219, IRF530, (2) MPF102, 2N3906, LM386, NE602.
COMM. QUARTERLY Winter98
Comment: N8FAM build this project and said it works great, he changes the transmitter driver transistor to a MRF115.
Description: The circuit designed by W5KQJ uses (3) LM411, LM380, LM741, (3) 2N2222. The board is 5 7/8" x 3"
Description: The project is built on a 6.5" by 2.5" double sided PC board using NE602, LF353, LF347, MC34113, 78L09, AND LM339 ICs. The 1750-meter band is 160Khz to 185Khz.
Description: This is a 40 meter transceiver on a 6.5" by 4" p c board, 2.5 to 3 watts out, with a line up of (6) 2n4400 transistors. The receiver uses 2n4393, (2) 2N3819, (2) 2N4400, LM386, and a 4 MHz crystal BFO. The transceiver is shown in the QST with the Unicounter from QST Dec00. (The Mini kit for the Unicounter is available from FAR Circuits)