[TenTec] Titan 425 Input Filter Board

[Dr. Gerald N. Johnson]

On Tue, 2008-02-05 at 16:47 -0800, Jim Brown K9YC wrote:
> 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?  

There was a tip. Shield with fins like a rocket? You need a new cable.
> 
> Or does the board need to be pulled 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
> 
> 
73, Jerry, K0CQ