To answer "NEED" re: the antenna, NO. Originally I have one that is missing the black base.
The part that screws to the NMO mount. Looking for a very cheap, even busted replacement.
As long as the base is complete with the tuning button.
I thought I had a couple buried in storage. The one I did find is OEM complete. forgot I had that.
Contents include the antenna, an un-cut stinger (whip), the hex tool, a packet of DOW#4,
18 foot RG58 on NMO with PL259 connector, and the install guide.
Being 1978 vintage, the guide is so old, it is faded and brittle. That is what I would like to find.
Why this antenna was discontinued, I will never figure. Built like a tank and a spring load fold over at the top of the base. Even today, it will out perform any mobile UHF antenna on the market.
The whip sets into a top adapter that screws into the top insulator. The contact is a spring doubles as the top coil.
I put a 3/16 brass button under the adapter compressing the top spring more. This increases the inductance enough the antenna will tune down to the upper UHF amateur band. The button in the base of course has to be set for max inductance.
Talk to me if you can make a great deal, if you do UHF, you might think putting this to use.
73s