[time-nuts] Re: HP 10509A antenna specifications?

[Gregory Muir]

Matt,

Threading wire of a small gauge through a loop antenna utilizing a metal sheathe is easy if you employ a "shuttle technique" to do so.  Simply use a small piece of soft open cell foam rubber shaped like a dart to which the end of the wire is connected, place it in the end of the tube and apply compressed air.  Repeat process until the number of turns is reached.

I have an electrician who does my underground conduit installations at electronic sites.  Some of these runs are hundreds of feet in length.  To pull the wires and cables through he first attaches a plastic grocery bag to the end of a small nylon rope, places it in the conduit (some up to 4" in diameter) connects the vacuum hose to a shop vac in reverse (blowing) connects it to the conduit and in a matter of seconds the bag & rope appears at the other end.  Then it is a simple task to attach a fish tape to pull the wires through.  The plastic bag opens like a parachute inside the conduit to provide a near airtight seal around its edges.  No time wasted here.

Greg



On Fri Apr 14 19:22:20 UTC 2023 Matt Krick mentioned:

"Aftter some searching I was able to locate an antenna, which might be the
actual antenna that was in use with my HP-117 on the roof top of a lab
building in an undisclosed location of the Nevada Desert.

Looks like there is either 18 or 20 gauge magnet wire in this loop, which
is mind boggling to think about how it was wound in there."