This is the very popular ARDF transmitter of the end of 20th century. The performance is very good, about 0.5-1W output, crystal controlled, very good internal ATU can tune almost any wire, powered by three "flat" batteries. Very reliable and durable, unfortunately, no timebase. Internal MOE..MO5 and MO keyer, can be operated by a straight key, too.

The weakest point of this TX is that keyer, made from ordinary TTL, using linear stabilizer from 12V downto 5V, thus, very power consuming. The consumption of the keyer is even greater, than the consumption of the whole TX ...