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Work HF antenna and 6-Meter Yagi Simultaneously on FLEX-6500

Mike W8MM
Mike W8MM Member ✭✭
edited June 2020 in New Ideas
I've seen a few questions about simultaneously monitoring or working HF and 6-Meters with a FLEX-6500.  Typically this involves some HF antenna (Tri-bander?) and a 6-Meter Yagi.

It's pretty easy to use an HF/6-meter duplexer to connect both antennas to a single antenna port on the 6500.  Now, one can enjoy having different panadapters open on 6, 10, 12 and 15, all receiving and displaying band activity.  The Comet CF-360B duplexer seems just right for this duty.

The only drawback is not being able to fully use the internal antenna tuner for transmitting through the duplexer into a poorly matched antenna.  This setup works very well for both transmit and receive barefoot into low-vswr antennas.

It can even be used to feed separate KW amps (one for HF, one for 6) which might have their own internal tuners.  A simple SPDT switch feeding the keying line to either KW PA solves the keying issue.


  • Ken - NM9P
    Ken - NM9P Member ✭✭✭
    edited June 2020
    I have that duplexer, bought for exactly this purpose while anticipating arrival of my 6500 last august, but never got the six meter squalo up. I plan to get it done this weekend!
  • Ernest - W4EG
    Ernest - W4EG Member ✭✭
    edited October 2019

    Thank you Mike,

    Never thought of doing that: I will integrate the duplexer for multi bands operation. 

    Now the only thing I wish is that Flex add eight antenna input for each slides on my F-6700!  LOL

  • philip.theis
    philip.theis Member ✭✭
    edited December 2014
    6700 does this seamlessly, it's beyond 2 bands that becomes the switching challenge, but we'll get there when we get data out of the I2C
    Fun getting ten bands or more into the XVTR port

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