Oh, please, please bring back the CW note of the Drake 4-line!
-de John NI0K
Bob McGraw K4TAX wrote on 6/6/2020 10:59 PM:
There are actually 2 time elements involved. First is the time
between key closure and the amp key command. This is approximately
3ms of processing time inside the
There are actually 2 time elements involved. First is the time between
key closure and the amp key command. This is approximately 3ms of
processing time inside the radio. The second is amp key command to RF
generation out of the radio. This is the 5ms between amp key command
and RF
I read that also. It was not a KPA500 or KPA1500. The Elecraft amplifiers are
designed with solid-state switching and are capable of switching very rapidly,
in much less time than 8 mSec. In fact the amps will switch quickly enough to
allow true QSK in the K3/K3S. Fred’s analysis is correct in
In fact, it's closer to 5-6 ms when set to 8. And of course it depends
on the amp. A general rule to "set it to 9" is silly. It just has to
give the relays time to settle down.
73,
Victor, 4X6GP
Rehovot, Israel
Formerly K2VCO
CWops no. 5
http://www.qsl.net/k2vco/
On 07-Jun-2020 04:00, David
Correct.
But if you are hot-switching at all, even only on the first element, you
risk damage to the amplifier and the transceiver.
73,
Victor, 4X6GP
Rehovot, Israel
Formerly K2VCO
CWops no. 5
http://www.qsl.net/k2vco/
On 07-Jun-2020 02:55, N4ZR wrote:
There's a big discussion going on in
With my P3 I observe many CW signals that are wide. And key clicks are
easily recognized. Likewise, transmit phase noise is also recognized as
some signals are wide and some are very narrow. Casual observations
seem to center on one particular brand of radio that is most prone to
have
Not really Dave, until you're sending at sufficient speed to tax the
sequencing of the radio. QSK is "inherently" a receive function -- mute
the receiver while generating RF, unmute when it's not. TXDelay waits
ms before starting RF to let amplifier switching settle, at
which point you're
QSK has everything to do with it. If you hot switch the amp you create
sharp waveforms every element even if the K3 keying is soft. The
discussion on the contesting forum included comments that the default
setting for TXDELAY on the K3 (apparently 008) isn't long enough and that
it should be set
I have operated a number of the 'big' CW contests. I have heard some
really, really wide sigs with horrible key clicks. Yes they were
strong but 10 KHz wide? Rob Sherwood and others have written about
this. Some of the really high-end rigs (non-Elecraft) allow user
adjustment of CW rise
True. TXDelay is a sequencing parameter to assure that downstream
switching has completed before RF appears. The keying waveform
[particularly the edges and "corners"] affect the sidebands and thus
bandwidth of the CW signal. I don't believe QSK has anything to do with
it, at least for a K3.
There's a big discussion going on in contesting circles online about the
problem of key clicks. There's been a lot of discussion about settings
called things like TXDelay, but so far as I can tell (and the manual
confirms), the K3's TX delay is intended to protect amplifier relays at
the
I have an interesting thing to figure out...
I have a K3 and my amp is a TenTec Titan 425.
I was CQing DX on 160 CW today using semi break-in and a fellow came
by and said I was generating key clicks. He came back and asked me to
QSY to SSB and I looked for him but didn't find him.
I went up
...@carolina.rr.com
- Original Message -
From: Gary Smith g...@doctorgary.net
To: Elecraft@mailman.qth.net
Sent: Wednesday, February 04, 2009 9:00 PM
Subject: [Elecraft] Key Clicks? Maybe, Maybe not.
I have an interesting thing to figure out...
I have a K3 and my amp
Gary Smith wrote:
I have an interesting thing to figure out...
I have a K3 and my amp is a TenTec Titan 425.
I was CQing DX on 160 CW today using semi break-in and a fellow came
by and said I was generating key clicks.
Ideas?
Thanks,
Gary
KA1J
This may not be the issue in
, February 04, 2009 10:58 PM
Subject: Re: [Elecraft] Key Clicks? Maybe, Maybe not.
Gary Smith wrote:
I have an interesting thing to figure out...
I have a K3 and my amp is a TenTec Titan 425.
I was CQing DX on 160 CW today using semi break-in and a fellow came
by and said I
Unfortunately no reply's on my posting, so I guess
I have to dig deeper into the way the CW signal is generated,and do some
wave form checks.
To do this I need some help,because the schematic diagram does not help me.
I woulk like to know the signal path for CW ,I guess it starts with U8 but
Nano,
Sorry you didn't get a response earlier.
K2 keying starts in the microprocessor and exits the associated 8 bit DAC
(U8) as the V-PWR signal. Then it is shaped in the ALC circuits and comes
out as the V-ALC signal (the level of this signal also controls the power
output level). (The
Thanks to W6UR raspy CW tone is solved,my mistake C91 not mounted.
But still having problems with keyclicks.
K2 s power amp is not used,permanent in class C,but a rectified RF output from
transverter output is
fed to V RFDET pin 10 aux I/O
When with external PS 2 Volts is applied to pin 10, K2
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