I don't suspect anything.
I know the 70mS in nonsense.
Most likely the tester had engaged the QSP Delay (which only works on the
receiver) and had failed to turn it off before measuring this spec.
I found out who sent me the Eagle keying screen shots; Dave, KW4M.
He gave me permission to post them, which I will do some time later today.
Vy busy this morning with my day job.
73 - Rick, DJ0IP
(Nr. Frankfurt am Main)
-----Original Message-----
From: TenTec [mailto:tentec-bounces@contesting.com] On Behalf Of Lee WA3FIY
Sent: Thursday, September 25, 2014 11:19 PM
To: tentec@contesting.com
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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