[TenTec] Jupiter - No transmit power output 10 meters

[John]

I have been having a similar issue with my Jupiter, and in fact it is 
home  after recent TT service for the problem, but the problem still 
exists and as far as I have checked, exists on all bands  I first 
noticed when using the radio for digital modes that I would after a bit 
(15 -30 minutes) either lose power out either temporarily or 
permanently.  It  happened again when I attempted to play in the WPX 
RTTY this weekend.  Symptoms are a loss of power.  In some instances, it 
will return, but that is just a temporary cure,  It repeats until  
finally I have no output.

In an attempt to define the parameters of the loss, it appears that the 
loss affects both digital modes through the line input, using VOX  as 
well as CW using a key.  In both these instances, the transmit indicator 
indicates I am transmitting but the power indicator on the screen and 
the power meter on my tuner indicate no output.

If the the Jupiter is repowered, most of the time, output will return 
temporarily.  If the Jupiter is reset, output power has returned each 
time but again only for a short time.    I have not seen this problem 
when operating SSB, but have not yet tested to see if SSB works after 
the power loss in digital or CW modes.

Has anyone seen this problem or do the symptoms point to any circuit 
within the transceiver?

John / WA1JG


On 2/12/2012 1:42 PM, Karl Heimbach wrote:
> Rick and Bill,
>
> Thanks for the quick response.  Shortly after I posted the question, I
> also tried 12 meters and found it too had no transmit, but okay receive.
> I'll take a look at your web page  Rick and then give Ten-Tec a call
> tomorrow for the relays.
>
> Karl - W5QJ
>
> On 02/12/2012 11:31 AM, Rick W wrote:
>> Karl you should test the output into a dummy load on all bands.  If the symptoms are similar on 12 metres and 10 metres then I'd suspect a relay failure.  I have written up the repair process on my website.
>>
>> On page 3 of my document there is a photo of the low pass filter board relays.  The 10/12 metre relay pair are on the right of the photo (immediately to the right of the 15/17 metre relay that is being replaced).
>>
>>
>> Good luck.
>>
>>
>> 73,
>> Rick
>> VE7TK
>>
>>
>> Website:  http://www.ve7tk.com
>>
>>
>> To: tentec at contesting.com
>> Subject: [TenTec] Jupiter - No transmit power output 10 meters
>> From: Karl Heimbach<kheimbach at sbcglobal.net>
>> Date: Sun, 12 Feb 2012 10:53:04 -0600
>> All, I will also post this to the Jupiter group, but seems I have no power
>> output on 10 meters.  I can see amps being pulled on the power supply
>> when the key is brought up or mike button pressed, but there is no
>> output power.  If memory serves me correctly, this has been reported on
>> 17 meters (and perhaps other bands too).  Receive is not effected. Other bands operate normally.  Do I have a bandpass filter or relay
>> failure?  It appears specific to 10 meters. Thanks, Karl - W5QJ
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