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From: Jan Panteltje on 19 Apr 2010 05:23
On a sunny day (Sun, 18 Apr 2010 19:19:14 -0500) it happened "Tim Williams"
<tmoranwms(a)charter.net> wrote in <hqg7i6$g73$1(a)news.eternal-september.org>:

>"Jan Panteltje" <pNaonStpealmtje(a)yahoo.com> wrote in message
>news:hqff0r$8sn$1(a)news.albasani.net...
>> Did you take into account that the speed of the electrons in that tube is
>> <<< c?
>> The turns per distance of the helix is chosen so the axial speed of
>> the RF signal is just below the speed of the electrons.
>> http://nl.wikipedia.org/wiki/Lopende-golfbuis
>
>Check my post from the 13th. If the total delay were due to the electron
>beam, it would be powered by about 160V.

Circular motion?
Been many years since I had to do with a TWT amplifier.
That was for a satellite uplink.
From: Jan Panteltje on 19 Apr 2010 08:57
On a sunny day (Sun, 18 Apr 2010 19:19:14 -0500) it happened "Tim Williams"
<tmoranwms(a)charter.net> wrote in <hqg7i6$g73$1(a)news.eternal-september.org>:

>"Jan Panteltje" <pNaonStpealmtje(a)yahoo.com> wrote in message
>news:hqff0r$8sn$1(a)news.albasani.net...
>> Did you take into account that the speed of the electrons in that tube is
>> <<< c?
>> The turns per distance of the helix is chosen so the axial speed of
>> the RF signal is just below the speed of the electrons.
>> http://nl.wikipedia.org/wiki/Lopende-golfbuis
>
>Check my post from the 13th. If the total delay were due to the electron
>beam, it would be powered by about 160V.

Circular motion?
Been many years since I had to do with a TWT amplifier.
That was for a satellite uplink.
PS because when you uplink to a sat at 40,000 km height,
then 40 ns delay is nothing compared to what you get.
Big echo when receiving back your own signal :-)
And with digital processing the latency is even bigger.
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