[TenTec] Jupiter intermittent receive

[Dave Edwards]

Well....The TR7 is a really good rig??   (just sayin!!)

...Dave


On 4/7/17 8:16 PM, Stan Gammons wrote:
> I tried DeOxit on the connectors and I've resoldered practically all 
> of the vias on the RF board along with all other connections on both 
> the RF board and filter board. The Jupiter just doesn't seem like it's 
> as sensitive as my TR7. I can hear stations on the TR7 and all I hear 
> on the Jupiter is noise.  I'm beginning to wonder if it might be an 
> AGC problem.   Anyone here know what the voltage should be on the AGC 
> pin on the connector which connects the RF board and DSP board?  With 
> no signal and an S9+20 signal, RF gain 100%, I have .57 volts on the 
> AGC pin.  With the RF gain at 0%, I have 1.57 volts on the AGC pin.  
> From about 30% to 100% RF gain, the voltage stays at .57 volts.
>
>
> 73
>
> Stan
> KM4HQE
>
>
> On 04/04/2017 02:06 PM, Stuart Rohre wrote:
>> For any intermittent in any radio brand/ model, the first thing for 
>> you to do is the following:
>>
>> One by one unplug and replug in carefully all jumper cables, flat 
>> cables, etc. on the rig boards. IF any show obvious corrosion you 
>> will need to procure some DeOxit contact cleaner and apply as per 
>> instructions.  This was carried by some Radio Shack stores, and hifi 
>> stores or ON Line.
>>
>> If there are band switches with movable brass silver contacts you 
>> need to place a drop of De-Oxit on each contact area, and rotate the 
>> switch back and forth.
>>
>> Usually the above will solve these type of problems.  If not, examine 
>> all solder joints for correctness of solder melting, shiny 
>> appearance, wetting, etc.
>> Examine any antenna contact jacks with spring loaded fingers to grip 
>> the matching connectors.
>>
>> TT uses a crimp on miniature coaxial connector that could work loose 
>> over time, check those.
>>
>> -Stuart Rohre
>> K5KVH
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>
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