That antenna should have come with a set of keys (2 - you only need one, one is a spare) to grab the slotted end of the antenna when it’s fully depressed.  If you do not have these keys you will have to make up something that will grab that slot.  The key has a slight hook on the end that lets it grab the slot when pulling up.

> On Aug 4, 2015, at 4:51 PM, Automatic digest processor <LISTSERV@GERRY.VANAGON.COM> wrote:
> 
> I recently bought and installed a hirschmann antenna. The kind with the litt=
> le slot on the knob at end of whip, and key to fit the slot.
> 
> But what use is the slot? Does it screw in ( not working for me)?. Doesn't h=
> elp pulling the antenna out, in fact when fully retracted its a bear to get a=
> hold of the knob.
> 
> I must be missing something obvious.

Cheers,    

Frank Condelli
Almonte, Ontario, Canada
'87 VW Westy, '00 Kawasaki 250 Sherpa, "98 Ducati 750 Monster & Lionel Trains (Collection for sale <http://frankcondelli.com/trainsal.htm>)
Frank Condelli & Associates <http://www.frankcondelli.com/> - Vanagon/Vanagon Westfalia Service in the Ottawa Valley
BusFusion <http://www.busfusion.com/> a VW Camper camping event, Almonte, ON, June 04 ~07, 2015