[TenTec] Jupiter intermittent receive

[Stan Gammons]

Yes.  Looks like I'm going to have to set the Jupiter on the shelf and 
put my other TR7 back on the bench...


73

Stan
KM4HQE



On 04/07/2017 08:04 PM, Dave Edwards wrote:
> 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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>>> TenTec at contesting.com
>>> http://lists.contesting.com/mailman/listinfo/tentec
>>>
>>
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>
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