How cheap QRP transceiver for one KV band? QRPver-1 may be the answer. It has dimensions of 103 x 30 x 75 mm and a weight of 350 grams. Structurally, it is a superhet with one intermediate frequency with a crystal filter. The control is a microprocessor. The oscillator is provided by the popular SI5351 circuit.
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This is how QRPver-1 behaves in the SSB league
QRPver-1 TCVR specification
supply voltage in the range of 10-14V (13.8V nominal value)
Consumption during reception and average set volume 100 mA
Consumption 600-800 mA when transmitting (average 700)
Receiver sensitivity better than 0.4 uV
Transmitter output power 3 W (max 4 W)
Low-pass amplifier Output Power 0.7 W
Intermediate frequency 6 MHz
MF filter width 2.9 kHz for -6dB
Switchable steep low-pass filter (400-2900 Hz)
Carrier frequency suppression better than 50dB
Suppression of unwanted band better than 45 dB
Block diagram of QRPver-1 v.3
The tiny TCVR is capable LSB / USB, CW / SSB / DIGI operations. AGC is switchable. Thanks to microprocessor control, the display shows the frequency, mode, filter width, tuning step or S-meter. The semi-automatic elbug will also please. Offset for CW is adjustable. In portable operation, you will also appreciate the low voltage indication.
The current price of QRPver is 0. It's not a top-spec TCVR, but a really tiny device for occasional use. To purchase through https://QRP ver.com/transceivers/qrpver_1_v_3.html, where you'll also find user reviews, more photos and videos.