The TS-530 is highly sophisticated solid state Amateur band transceiver employing only three vacuum tubes. Operating on all Amateur bands between 1.8 and 29.7 MHz, this unit is constructed modularly. The TS-530 includes many built-in features usually found as extras on other transceivers. Included are VOX, 25 kHz calibrator, RIT, RF attenuator, and an effective noise blanker. The TS-530 also includes automatic gain control (AGC), automatic level control (ALC), semi-break-in CW with sidetone, a speech processor, speaker and built-in AC power supply. Any complicated electronic device will be damaged if operated incorrectly, and this transceiver is no exception. Please read all of the operating instructions before putting your TS-530 on the air. 1.2 FEATURES 1. Interference-free DX operation * TUNABLE NOTCH FILTER Interference is reduced or eliminated using the built-in notch circuit. The TS-530 uses an Audio notch filter. * IF shift circuit The IF SHIFT is a circuit to shift IF pass-bandwidth without changing receive frequency. It eliminates interference or adjusts receive frequency characteristic as desired. * NARROW/WIDE BAND WIDTH selection and optional filters for enhanced operation. NARROW or WIDE CW operation can be selected when using one of two optional filters: YK-88C (500 Hz) or YK-88CN (270 Hz) NARROW or WIDE SSB operation can be selected when using the optional YK-88SN (1.8 kHz) filter. 2. WARC bands The TS-530 fully covers the 160-10m Amateur bands, including the new WARC bands of 10, 18 and 24.5 MHz. The VFO covers at least 50 kHz above and below each 500 kHz band. The optional VF0-230 external digital VFO covers about 100 kHz above and below each band, for MARS and other applications. 3. All-in-one, compact AC Power supply. 4. Advanced circuit design for improved two-signal characteristics. Cleverly designed front-end circuit components and receive circuit system assure excellent two-signal characteristics. Cross-modulation and blocking are reduced. 5. TX final unit uses 6146B's/S2001 A. The final transmitting tubes are: two 6146B's two 6146B's, 6146B's/S200/AS for the TS-530SP; on S2001 Afor the TS-530D. Amplified ALC provides clear, strong signals with reduced cross modulation. 6. Variable level noise blanker Conventional fixed level noise blankers are sometimes less than effective in removing pulsating noise over weak signals or rejecting strong interference signals. This variable level noise blanker is equipped to control the optimum threshold level of the gate pulse amplifier. 7. The speech processor controls the audio compression level and ALC time constant to increase the average audio level and transmit power. 8. XIT (Transmit Incremental Tuning) for fine adjustment of transmit frequency independent of receive frequency. 9. Built-in digital display Displays accurate frequencies to the 100 Hz order, any band or mode. 10. The controls are arranged on the zinc die-cast front panel for easy operation. 11. A full variety of accessory circuits are provided: The TS-530 includes: VOX circuit (available for Semi-Break in). Marker circuit, side-tone oscillator, selectable AGC (OFF, FAST, SLOW) RF Attenuator, CW zero-beat circuit (in the Tune position), HEATER switch, SCREEN GRID switch, and built-in speaker.