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6 meter firewall

Jack6600 Member ✭✭
edited August 2019 in New Ideas
In the late 50’s International Crystal sold a VFA-1 tube cascode 6 meter amplifier. I use it on a vertical 6m antenna to monitor the band and to protect the RXA port on my 6600. It also receives better than my Hygain 66DX6 beam. image


  • Bill W2PKY
    Bill W2PKY Member ✭✭
    edited May 2019
    Eskip signals can have flipped polarity.
  • Jack6600
    Jack6600 Member ✭✭
    edited August 2019
    The beam was in the wrong direction but when I tuned it to the correct heading, the signal was a tad better on the vertical. The IR VFA-1 was given to me from a old friend W9SKD (SK) and was in my junk box for years. Searching the internet, I found a 1950’s article in Electronic Experimenters magazine that inspired me to resurrect it.
  • Clay N9IO
    Clay N9IO Member ✭✭✭
    edited May 2019
    Jack check ur email. Sent you a message. Clay N9IO

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