[TenTec] din connector, etc.

[Mike Schatzberg]

So why then do the manufacturers design the T/R switching with this delay?  Is it to avoid hot switching in the amplifier should one be used. 

Not really. This delay is necessary to permit settling of the DSP circuitry when switching from receive to transmit.  

Hence most modern DSP radios will have the delay. Nice to know if you are designing QSK amplifier conversions. 

According to Ten Tec, the actual O2 delay is 13 ms, which limits the top speed in true QSK to 45 wpm. No wonder there were no speed limitations reported on the 565/566 reflector. 

Thank you Paul Clinton. 

73,

Mike 
W2AJI

Sent from my iPhone

> On Sep 25, 2014, at 8:05 AM, Carl Moreschi <n4py3 at earthlink.net> wrote:
> 
> A lot of the newer radios are now looking good in this respect also. The Yaesu FT3000 and FT5000, Elecraft K2 and K3, Flex 6000 series, are all good on this now.
> 
> Carl Moreschi N4PY
> 58 Hogwood Rd
> Louisburg, NC 27549
> www.n4py.com
> 
>> On 9/25/2014 1:04 AM, Ken Brown wrote:
>> "The dit starts 17mS later and completes 17mS later. The first dit is
>> sent in its full length and the op on the other end never even hears the
>> difference."
>> 
>> That is good to hear. Ten-Tec seems to be the only radio company that
>> understands this. (Correct me if I'm wrong. I hope I'm wrong.)
>> 
>> Almost every radio review I see in QST shows shortened first dits even
>> if they do get the following elements right. Some rigs have a delay on
>> the beginning of the dits and dahs, so amplifiers have time to switch,
>> but fail to add a delay to the end to restore the proper timing of the
>> elements.
>> 
>> DE N6KB
>> 
>> 
>> 
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