[TenTec] Titan 425 Input Filter Board

[Jim Brown K9YC]

Hi Guys, 

I'm troubleshooting a "stuttering" keying problem on one of my 425s. 
I suspect a relay problem -- K3, K4, or K6. Vacuum relay is fairly 
new Gigavac, replaced last summer, and it's been through several 
contests. I have three of these amps, so I traded the 81218 board 
(that has K6 on it) from one amp to another. Didn't fix it. Then I 
changed K3. Didn't fix it. 

While pulling the 81219 board to change K3, the coax jumper from it 
to the Input LPF board came loose from the Input LPF board. My 
question is about that jumper, which appears to be one of those micro 
plug and socket connections, but which I don't think I've been able 
to seat reliably. Am I right that it is a plug and socket? The tip of 
the "plug" is bare center conductor of the mini-coax (RG174 or 
equiv), no tip on it. Is there a trick to latching it? Has the tip 
come off and I've lost it?  

Or does the board need to be pullled and the connection soldered? 
This board could be rather tricky to pull and replace -- it's got the 
input bandswitch on it, and at least two of the screws look real 
tough to get in and out.  

73,

Jim K9YC