[TenTec] din connector, etc.

[Bob McGraw - K4TAX]

Per the Tentec published spec on TX>RX recovery time it is 20 ms.

73
Bob, K4TAX


----- Original Message ----- 
From: "Lee WA3FIY" <wa3fiy at radioadv.com>
To: <tentec at 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
>>
>
>
> _______________________________________________
> TenTec mailing list
> TenTec at contesting.com
> http://lists.contesting.com/mailman/listinfo/tentec
>
>