One of two things come to mind. GE uses a "short center pin" RCA plug. If you are using a regular length RCA plug, the center pin will be too long and may short if pushed in too far.
The other thing that comes to mind is that when plugging in your signal generator, and the shield doesn't make contact with the jack, you may see a higher than normal signal level. I assume this happens because the signal generator has an impedance imbalance because it's not property terminated. (Someone else may jump in and explain this in more detail). Chuck WB2EDV ----- Original Message ----- From: "wb8art" <[email protected]> To: <[email protected]> Sent: Thursday, May 28, 2009 5:02 PM Subject: [Repeater-Builder] Exec II input problem > Wonder if anyone has had this problem and know what the problem is. I > am working on a GE Exec II repeater (converted mobile) which has no Comb > no. I any case the issue is that if I move around the cable feeding it > with a generator I was seeing a change in the recieve. > I went directly to the RCA jack, and then found that just making > connection with the center pin, I have about 10 to 20db stronger recieved > signal than when I push it all the way in making the ground connection. > This is a mobile and the RF deck is no. is 19D417075G14 rev A covered > by LBI30032E. This shows a option of either non floating ground or > floating ground input. This one is a non floating ground one. Might have > been changed but I have know knowledge of its history. > The RCA jack center pin connects directly with a wire thru a hole to > the first helical and I have looked and can see no connection issues and > measures a short with an ohm meter. I even reheated the solder joints and > no change. Anythoughts would be appreciated. > > Randy > > >
