Ahhhhh....... where do you get that Jim? Various Ten-Tec, Elecraft, and Yaesu
radios all
have Rx to Tx turnaround times of at least 16mS (Eagle) to 36mS (FT5000) with
other Ten-
Tec's and Elecraft in between. Tx to Rx turnaround times run 18mS (Orion II)
to 66mS
(FT5000) again with other TT's and Elecrafts in between with TT radios all
being close to the
Orion II, others not so much. Strangely, the ARRL did not publish K3 Rx to Tx
turnaround
time. How is it that TT is going for the lowest common denominator?
Has anyone complained about poor QSK performance with a Ten-Tec rig?
Well....yes they
did! In the early days of the Orion, TT ran into latency issues with DSP as I
recall. They
worked that out as you can see. Orion and other TT's are the class of the
field.
All that said, there is more to QSK operation than turnaround times. But that
is for another
discussion.
73,
-Lee-
WA3FIY
On 24 Sep 2014 at 11:38, Jim Brown wrote:
> Understood, Rick. But 17msec pretty much rules out QSK above about 18
> WPM. A strange design compromise for Ten Tec. :) Frankly, I'm both
> surprised and disappointed to see Ten Tec go for the lowest common
> denominator -- they never used to do that. For my money, amps with
> open frame relays are for ragchewing on SSB, not serious operating.
>
> FWIW, delay in the K3 is continuously adjustable, and I think it is in
> the FT1000MP too. I sold mine around 2008 to buy my K3s. The TS850,
> which I also owned, is fixed at about 8 msec. The K2 is 8 msec.
>
> Also FWIW, K6XX published a simple "speed up" circuit for T/R relays
> quite a few years ago, which he credits to K1KP.
> http://www.k6xx.com/radio/fastrely.pdf
>
> 73, Jim K9YC
>
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