Well yes, the routine for the Eagle is slower than many other tuners, even
the one in the Orion and Omni VII series. Those are different tuners and
have their own processor to handle solely the tuning routine. The big
difference with the Eagle ATU, it shares the processor that handles the
radio and its associated housekeeping chores. Your referenced MFJ has its
own processor to handle the tuning routine and it does nothing else.
As to activating the TUNE routine on a frequency, if you do it again it will
run the routine again. Typically I find it slower on the lower frequencies
as opposed to the higher frequency bands just as you have indicated.
If you run the TUNE routine on 75M and then switch to 40M and run the TUNE
routine and then switch to 20M and run the TUNE routine, when you switch
back to 75M, same frequency, you will find that a proper match exists as the
tuner has stored the parameters for 75M. Thus it is not necessary to run
the TUNE routine. Same for the other bands as well. Now if you have
switched back to 75M and press the TUNE for the routine, it will again run
through the steps to find the correct match even though it had previously
found a match. In each case, when TUNE is activated the tuner will run
through the routine regardless of what was done or stored earlier.
73
Bob, K4TAX
----- Original Message -----
From: "K3GHH" <k3ghh@arrl.net>
To: "Discussion of Ten-Tec Equipment" <tentec@contesting.com>
Sent: Sunday, September 07, 2014 5:33 PM
Subject: [TenTec] Eagle AT slow?
I'd welcome some comments on the internal Eagle AT (Model 599AT).
Here's mine: On 3570 KHz, where my MFJ-269 shows the old trap doublet has
an SWR of 2.7, the Eagle took 15 seconds to tune. Leaving it on that
frequency, a minute or so later a second try also took 15 seconds. A third
tune, on the same frequency another minute later, took 10 seconds.
On 40m, where the SWR is 2.1, tuning takes 7 seconds.
I know the old antenna here at the camp needs work... but that behavior on
80 doesn't seem right. The manual (p. 37) says the AT is "designed to
recall the last tuned setting for a given band." Maybe I don't understand
how that memory works, but I don't think the MFJ-293B that I have at home
would behave like this.
--John K3GHH/2 _______________________________________________
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