My first coax switch was a plywood board nailed to the wall, with
antenna coax cables coming in from above and hanging vertically. I
soldered a heavy wire along the shields, and bent hooks in the
center conductors. The feed cable from the rig had a hook in the
center conductor, and a heavy short braid from shield to the other
shields.
Gravity made the connection, I just moved the cable to whatever
antenna I wanted and let it hang.
My oldest switch is a old PACE CB radio antenna switch that I
installed a large high-current ohmite switch in almost 35 years ago.
Even something as small as a Henry 8K wouldn't be able to hurt it.
It is still in use in my station today switching high power HF and
VHF antennas, although most switching is now via RCS-8V's.
We can get away with amazing things at HF. The biggest problem
is almost always mechanical and power handling rather than
shielding or loss.
73, Tom W8JI
W8JI@contesting.com
________________________________________________________________________
Where do you get ICE bandpass filters & beverage matching boxes? The
same place that pays for the hosting of this list: The eHam Store.
Order online at http://store.eham.net.
-----------------------------------------------------------------------
-----
FAQ on WWW: http://www.contesting.com/FAQ/towertalk
Submissions: towertalk@contesting.com
Administrative requests: towertalk-REQUEST@contesting.com
Problems: owner-towertalk@contesting.com
|