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====== FlexRadio Flex-6xxx ======

A series of high-performance 100W HF/6m SDR transceivers. Driven using SmartSDR software or the Maestro standalone control head (actually a Windows tablet in a box).

===== Models =====

| Model | Current | SCUs | Max rcvrs | Max b/w | ATU      | RX-only inputs | Diversity RX | Integrated display | 2m  | 
| 6300  | no      | 1    | 2         | 7 MHz   | optional | 1              | no           | no                 | no  |
| 6500  | no      | 1    | 4         | 14 MHz  | optional | 2              | no           | no                 | no  |
| 6400  | yes     | 1    | 2         | 7 MHz   | optional | 2              | no           | no                 | no  |
| 6400M | yes     | 1    | 2         | 7 MHz   | optional | 2              | no           | yes                | no  |
| 6600  | yes     | 2    | 4         | 14 MHz  | yes      | 4              | yes          | no                 | no  |
| 6600M | yes     | 2    | 4         | 14 MHz  | yes      | 4              | yes          | yes                | no  |
| 6700  | no      | 2    | 8         | 14 MHz  | yes      | 3              | yes          | no                 | yes |

An SCU is a Spectral Capture Unit.

The 6300, 6400(M), and 6500 have 1 Spectral capture unit that sample the entire HF spectrum from 30Khz to 54Mhz all the time.

You can use 2 slices or receivers on a single SCU radio on any part of the HF spectrum you wish. The only limitation is that you have to use the same antenna to do that.

If you have a 160M to 6M multiband antenna, you can receive 160M and 6M at that same time.

If you go to a 2 SCU radio then you can use 2 different antennas at the same time. They are independent of each other. 


===== Resources =====

http://nn4zz.com/FLEX6700.htm - some hints and general unstructured information

https://k9dur.us/smartsdr_utilities.php - SmartSDR Utilities