Flex Radio 6500 Signature Series

Receive frequency coverage

30 kHz to 77 MHz Reference

Transmit frequency coverage

160 m–6 m (amateur bands only by country) + MARS Reference

Modes

A1A (CW), A3E (AM), J3E (SSB), F3E (FM) Reference

RF output power

100 W CW/SSB/FSK/FM; 25 W AM at 13.8 VDC nominal Reference

Power requirement

+13.8 VDC ±15% Reference

Current consumption

2 A receive typical; 23 A transmit maximum Reference

Frequency stability

0.5 ppm TCXO; with GPSDO option, 5×10⁻¹² over 24 hours Reference

Operating temperature

0 to +50 °C (+32 to +122 °F) Reference

Dimensions

With feet: 13 W × 12 D × 4 H in (33 × 30.5 × 10.2 cm); without feet: 13 W × 12 D × 3.5 H in (33 × 30.5 × 8.9 cm) Reference

Weight

13 lb (5.9 kg) Reference

Antenna impedance

50 ohms, unbalanced Reference

Sensitivity

Typical MDS in 500 Hz bandwidth, preselector off: −121 dBm / −125 dBm / −136 dBm / NA for preamp off / 10 dB / 20 dB / 30 dB Reference

Specifications may vary by revision or market. Use linked manufacturer references when available and confirm critical details before purchase.