[TenTec] Jupiter frequency jump?

[WA3FIY]

Hello Don,

The Scout frequency jumping problem you refer to is probably the 
one mentioned in the Scout manual and has to do with the frequency 
stabilizing control.   The control uses a microprocessor to measure 
the frequency of the PTO and to hold it on a certain multiple.   That 
same chip is used as the keyer, and while you are sending CW, it is 
not able to stabilize the frequency of the PTO.  If you send CW for 
a long period without a break, and if during that time, the PTO drifts 
significantly, when you stop sending, the chip will lock on to an 
adjacent multiple, hence a frequency "jump". 

If this is the condition you are referring to, the Jupiter has no such 
condition.   It works on an entirely different principle.  My 
experience with both a Jupiter and a Pegasus are very good in 
respect to frequency stability under all sorts of operating conditions. 
 In addition, the N4PY control software has provisions for 
calibrating the frequency against WWV, resulting in a stable and 
ACCURATE operating frequency.

I cannot see any way the Jupiter could have the "same frequency 
jumping problem [BTW, that was not a problem, it was a limitation 
fully disclosed by Ten Tec in the manual] as the Scout".

In my opinion, the Jupiter is a fine radio, well worth it's modest 
cost, and a lot of FUN!

No, I don't work for Ten Tec but I do appreciate their products and 
service.

-73-

-Lee-


On 2 Dec 2001, at 17:41, Don Jones wrote:

> I am contemplating buying a new Jupiter and am trying to find out as
> much as I can about them. Today I received a report that "they have
> the same frequency jumping problem as the Scout" (someone else's
> words, not mine).  I have not read all the archives,  but I don't
> recall reading or hearing any previous report of this. I recall
> reports that the Scout had some such problem when they first hit the
> market but I assume that has been resolved.
> 
> Any comments?
> 
> 73 - Don Jones N4TN
> 
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