Per the Tentec published spec on TX>RX recovery time it is 20 ms.
73
Bob, K4TAX
----- Original Message -----
From: "Lee WA3FIY" <wa3fiy@radioadv.com>
To: <tentec@contesting.com>
Sent: Thursday, September 25, 2014 4:18 PM
Subject: Re: [TenTec] din connector, etc.
I suspect that the 70mS Tx to Rx turnaround for the Eagle is either a
misprint or a radio out
of spec. I looked at six fairly recent Ten-Tec radios yesterday and the
average Tx > Rx time
is 26mS ( leaving the Eagle out of the calculation). The latest three
Elecraft radios are 34mS
turnaround. So.....that 70mS is WAY out of character for a good QSK
radio and raises some
doubts about it's accuracy in representing the Eagle fleet. Especially
given the VERY
positive comments from CW operators here about the quality of Eagle QSK.
BTW, Ten-Tec
specs the Eagle Tx > Rx recovery time at < 20mS which is quite in line
with the others I
examined.
This is a problem with published specs. Manufacturers and reviewers alike
sometimes make
mistakes in which the published specs may cast a shadow over the radio
being evaluated
and can even trash sales in some cases. We need to be careful about
putting too much
credibility into such numbers unless verified over a reasonable size
sample by more than one
testing lab.
Or...in the case of Ten-Tec if we are serious about buying a certain radio
but have doubts
about some such test result, order the radio and try it out for thirty
days. If it really is as bad
as was reported and if that makes it undesirable for our use, return it.
Sidenote:
When the Pegasus first shipped there were a lot of very negative comments
on the list about
it. After reading a bunch of those I thought WOW...Ten-Tec really dropped
the ball on this
one! But, following my own advise I ordered one to see for myself. Long
story short...I kept
the Pegasus and added four more to the fleet here. As I write this I am
looking at two of
them on my desk as primary radios with a spare on hand (never needed) and
two for my
grand daughters. I know they are not contest radios..I know that. I have
an Orion for that
purpose if needed. But for every day use I find the Pegasus with N4PY
control software a
real delight. Look at the success of Jupiter. A Pegasus with a front
panel and a great seller
for Ten-Tec. Well....I would be less well off today if I had paid
attention to the grumbling and
moaning about the Pegasus way back then.
73 all, enjoyed this discussion.
-Lee-
WA3FIY
On 25 Sep 2014 at 12:12, Jim Brown wrote:
SNIP.......
Looking at ARRL test reports for the Eagle and the TS590S -- the "TX
to RX turnaround time" for the Eagle is 70 msec" and 20 msec for the
590. So, as Rick noted, at high keying speeds we're not going to hear
between the dits, even barefoot. For both rigs, there's no shortening
of the dits in full QSK at 60 wpm, and if the key signal to the power
amp is coincident with the keying signal to the rig, an amp with a
vacuum relay or diode switching should reproduce the keying waveforms,
while an amp with open frame relays is likely to hot switch (unless
there's a speedup circuit).
73, Jim K9YC
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