[CQ-Contest] A portable rig for contesting?
aa4lr at arrl.net
Wed Oct 5 20:37:44 EDT 2005
On Oct 5, 2005, at 11:36 AM, VR2BrettGraham wrote:
> It is impossible to interface any radio into an existing station
> using existing equipment that is based on asserting some form
> of PTT if that radio has no PTT.
Impossible? I don't think so. Inconvenient? Certainly. Difficult? Maybe.
> The typical suggestion from Elecraft community of adapting
> _everything_ to accommodate the K2 when this is not
> necessary with any other radio since before even my father's
> & grandfather's SX-71/Viking 2 combo I suspect will not meet
> with much acceptance here.
The K2 is different from other radios in some ways. Amplifier keying
is one of those ways. The K2 will assert amplifier keying 20-40ms
before it begins to produce RF, and it does so without clipping the
So, if the goal of CW PTT is to avoid hot-switching the amplifier, it
is not necessary with the K2.
> Even interrupting the key lines is something that is unacceptable
> for SO2R - everything is done based on PTT & positive control
> of RX/TX state.
Everything? Perhaps more explanation would be helpful here.
> I'm curious - who does _not_ use PTT for SO2R for serious
> operating on CW? Perhaps we could hear from folks like K5ZD,
> KQ2M, etc.
An alternative question would be - exactly what function is achieved
with the CW PTT?
Bill Coleman, AA4LR, PP-ASEL Mail: aa4lr at arrl.net
Quote: "Not within a thousand years will man ever fly!"
-- Wilbur Wright, 1901
More information about the CQ-Contest