[MRCA] [HarrisRadio] Harris RF-1110/1310 {External}

[Ray Fantini]

Think there may be something evil in the cable between the amplifier and the exciter and will take that apart tonight and examine. There is a signal pair cable that extends out of the J-11 side so at the very least will investigate that. At some point someone else put together the cable from the amplifier to the performance monitor and ended up just cutting off both ends and doing that cable over again. 
More concerned about the lack of output of the exciter but lets get all the interconnects straight first. When I bought this project it came with the performance monitor and at first thought that was a waste of time but now that its running kind of like looking at all the pretty light , very festive for this time of year. Lots of red  yellow and one green lights. And who can ask for more, one light to see that the main breaker is off and another to tell you its closed!

Ray F/KA3EKH 

-----Original Message-----
From: HarrisRadio at groups.io <HarrisRadio at groups.io> On Behalf Of Rich Bradley WB3DZC via groups.io
Sent: Friday, November 19, 2021 10:20 AM
To: HarrisRadio at groups.io; MMRCG at groups.io; mrca at mailman.qth.net
Subject: Re: [HarrisRadio] Harris RF-1110/1310 {External}

Ray,

  I had the same problem with my RF-1310A and RF-110A.   I've included
some information in the attachment that may help.   It includes:

1) Details of Interface cable W2, EXC J11 and PA J7 (bottom of first page and the two following it).
2) My listing of the wires in the cable I made for W2 (ignore the colors since they only apply to my cable)
3) Note that J11-24 must connect to chassis ground (J11-8).  Tells the RF-1310A the PA is OK but PA does not support this line so it is just grounded at the EXC connector.  The fault light on the RF-1310A should then go off.
4) Note that A18A1 switch S1-4 must be in the closed position to control the PA from the EXC.
5) Power-up procedure point "d" - this jumper is required.

I also replaced a blown transistor in the alarm / fault circuit on circuit board A5 of the RF-110A.  I found this by monitoring the logic from the return lines that go to the A18A2 ICs in the RF-1310A.

73,
Rich
W4DZC