The Motorola connector is quite different from the RCA connector. The
ground sleeve is sometimes solid and sometimes slashed, with the ground sleeve sectors "bulged" for solid contact, as seen here. The number of slashes varies.
As pointed out already, the centre conductor of the cable has a tiny
diameter. It's a solid conductor; very little handling of cable and connector will cause a break in the centre conductor within or near the connector.
John
at radio station VE7AOV.
+++++++++
n 2023-09-07 14:23, N2MS wrote:
Wasn't the connector used with auto radios called a Motorola connector? The connector has a larger diameter and the center pin is longer than the RCA "phono" connector?
Mike N2MS
On 09/07/2023 2:27 PM EDT DougVL <k8rftradio@... > wrote:
On Sat, Aug 26, 2023 at 01:32 PM, Ben Cranston wrote:
central pin ¡°is¡± the resonant element
Car radio antennas are a 'high impedance' design, and their co-ax cable is
also Hi-Z.
While 'any antenna' will radiate, some do it FAR better than others.
To more directly answer your original question, you would need a cable
with the proper connector to connect the antenna to the vna. Do you have
one? As I recall, older car radios use a connector like the old RCA phono
plug/jack system. A push-in coaxial plug to fit the car's jack. Get an
extra car antenna with cable from a junkyard, cut off the 'radio' end and
use the cable with the vna.
--
Doug, K8RFT
Screenshot from 2023-09-07 19-44-36
