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Licensed since 1965 and currently living in Burbank, CA.  After working 40 years in electronics and Information Technology, I retired in 2013 and have more time for amateur radio now.

Main station here is a Kenwood TS-590SG with SDRPlay/HDSDR panadapter and an Ameritron AL80B amplifier.  I've modified the AL80B with vacuum relays for quiet and fast T/R switching.  My antennas are a 20-10 meter hexbeam at 40 feet, a 40/160 meter trap-dipole/vertical, an 80 meter vertical, and a 30 meter vertical.  I also have a receive-only antenna for 80 and 160 meters.  I use an Elecraft K2CR band decoder with a Rat Pak antenna switch to automate antenna switching.  The K2CR gets power and band information from the TS-590.

The photo below shows the feed system for my 40/160 trap-dipole/vertical.  A 40 meter coaxial dipole is hung from the top of the mast and a remote switchbox and loading coil are used at the base to switch to vertical operation on 160.  For 160 meter operation, the switch box ties the feedline center conductor and shield together and inserts the coil to resonate and match the antenna. The coil is from an earlier antenna that needed more inductance. Only the lower third of the coil is being used now.

Here is the diagram for the switchbox.

Diagram of my 80-160 meter receive antenna ...

Diagram of the receive antenna control ...

Photo of the new relays in my AL80B ...

Photo of my operating position ...

And my station diagram ...



73 - Jim/ND6P


8441677 Last modified: 2017-11-09 04:56:54, 2470 bytes

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