The SB-610 is a display to monitor “on the air” signals. The manual notes that the unit can be used from 160 to 6 meters without tuning or modification. Its primary purpose is monitoring the transmitted signal pattern; the RF envelope, RF trapezoid, or RTTY cross pattern. A rear-panel attenuator can accommodate any transmitter from 15 watts to 1 kilowatt. The SB-610 can also monitor the other station’s signal when connected to a receiver’s final IF amplifier stage, assuming the receiver IF has sufficient bandwidth. This unit came equipped with 3000-6000 KHz coils to match the 3395 KHz IF of Heathkit’s SB-line and HW-100 series.
Pre owned, in good condition see photos. Item NOT tested.
Note: We do not test, remove covers or inspect vintage equipment. This includes the piece of equipment listed here. These pieces came from estates and if we had to test, and visually inspect these vintage pieces, the asking price will be much higher. What you see here in these photos is what you are buying. It is being sold as is, where is with no returns. If this is not acceptable, please refrain from purchasing this unit.
Sold as is, no refunds.