[R-390] Front Panel Diode Load

[Bill Coleman]

Flowertime01 at wmconnect.com wrote:
> I'm refurbing a basket case R-390A. Getting ready to install the front 
> panel & I have one dangling shielded wire in the harness.  It's near the 
> 1/4 phone jack, the shield is connected to the jack's ground lug and the 
> center conductor has no home.
>
> I'm pretty sure this is the front panel diode load, but I get no 
> continuity to the rear diode load connection. I don't see the front 
> panel diode load in any of the doc that I have. 
>
> Anybody know for sure?
>
> THANKS!
>
>
> -----------------
> Bill the front panel phone jack is the front panel phone jack. It comes off 
> the local line output through a couple resistors. The coax center conductor 
> should be the tip of the phone jack while the shield is the conductors shield to 
> the ring of the phone jack. Lots of the wire harness in the R390 is shielded 
> wire (coax). It keeps the cross talk and coupling down as signals are routed 
> around the chassis.
>
> The diode load jacks were single pin test point jacks. The front panel was 
> drilled with a 1/4" hole and the test point mounted.
>
> Hope this helps.
>
> Roger AI4NI
>
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>   
I was less than clear in my post...   The front panel I'm working on did 
not come with the R-390A chassis that is getting it... The original 
front panel for that chassis is long gone.   

I found a Navy mod for the front panel Diode Load "Test Point" and that 
is indeed what the orphaned wire is for - the headphone jack has all of 
it's wires accounted for.

THX for the responses!

73, Bill   N2BC