Hi group.
Please understand, this nice transceiver is used not only for HF. but
also for VHF,UHF and uppp.
So, more TX DLY is needed!
LNAs, polarization switches, PA and transverters in the transmission
line.
Sequencer is nice device but if U press XMIT button - BIG BAGA BUM :(
I hope Elecraft engineers will add additional TX DLY.
Tnx a lot.
------ Original Message ------
From: "Wayne Burdick" <[email protected]>
To: "[email protected]" <[email protected]>
Cc: [email protected]; [email protected]
Sent: 08.06.2018 17:48:26
Subject: Re: [Elecraft] Default K3 transmit delay may be too short for
slow QRO amplifiers
Also, a reminder: this is nothing new. We’re just clarifying a delay
offset that has existed for a long time. There have been no recent
firmware changes.
It would be possible to modify the K3’s keying algorithm to allow for
much longer delays (say, 0 to 200 ms). Of course this would
significantly shift CW RF output in time relative to keying input.
Fortunately, very few amplifiers require more that a few ms of extra
delay.
73,
Wayne
N6KR
----
http://www.elecraft.com
On Jun 8, 2018, at 7:33 AM, Wayne Burdick <[email protected]> wrote:
The delay can be set from 8-20 ms at present. Given the small time
offset, this is actually 5-17 ms (approx). Use small values if
possible.
With external keying, you can generally compensate by reducing the
device’s weighting.
Wayne
----
http://www.elecraft.com
On Jun 8, 2018, at 5:02 AM, "[email protected]" <[email protected]> wrote:
I agree that 5ms is too fast for many amplifiers. Is computer sent CW
also
spoiled when increasing the delay? Does it only effect QSK or all
transmissions?
John KK9A
Igor Sokolov ua9cdc wrote:
Wayne it is a pity that TX delay setting affects CW timing. Changing
TX
delay from default even one or two steps makes CW much worth. Can you
figure out a way to make CW timing independent from TX delay? With 5
ms
TX delay working in many contests I already had to change a pair of
relays in the amplifier. 10-12 ms would be fine for me. 20 ms will
probably suit the majority of users. But 5 ms is way too fast and
unfortunately cannot be altered without spoiling CW sending. I know
that
I could build external sequencer but this does not look neat enough
especially for portable field operation. Every other radio I had
allowed
TX delay adjustment to at least 20 ms.
73, Igor UA9CDC
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