[TenTec] How We Buy Things

[WA3FIY]

On 31 Dec 2003 at 14:44, Bill Coleman wrote:
> 
> I suppose you find this whole PTT discussion laughable.  Personally I find a
> radio with FOUR ways to connect a key somewhat laughable.  I still don't
> know why I would want to ever send CW with my mic PTT switch or my
> footswitch.  But if TT put it there and they have a 'superior'
> implementation, then it must be the best, huh?
> 
There are disadvantages to using PTT as you describe.  I 
posted an example yesterday, but repeat it here.   On the 
other had, it is quite simple to accomplish the "PTT" controlled 
function by connecting the computer CW PTT output to the 
amplifier control input in parallel with T/R output of the radio.  
No changes to the radio necessary.   This seems to be getting 
lost in the noise.

REPOST
Yes there are disadvantages.  Here I use the PTT line for 
multiple functions.   As a PTT line when on SSB, as a CW keying 
line when sending CW from my computer and as a PTT line when 
on RTTY/SSTV/PSK.  The last two functions use a single 
interface line from my computer which is effectively in parallel 
with the mic PTT switch.   The same line keys the rig on CW 
and puts it into transmit for the sound card modes.  This would 
not be possible if the PTT line was configured as you suggest.  

73,

-Lee-