Interestingly enough, Ken, I just tried using the Omni 6+
with its internal key. With the keyer adjusted for about
30 WPM, a string of dits gives what appears to be an
~33% duty cycle, but I would have to put it on my scope
to verify that. Listening to it at this speed on another rig
(TS-940S) it sounds pretty good. I do, however, detect
the so-called "microchirp". I personally don't find it terribly
objectionable. If you listen to the 16th harmonic, however,
the "microchirp" starts to sound like an old Russian UW3DI
rig :):) Of course this make me wonder whether I have v1.03
or v1.02 firmware. Guess I will have to lift the hood and find
out.
73 de Mike, W4EF.....................................
----- Original Message -----
From: "Ken Brown" <ken.d.brown@verizon.net>
To: "Discussion of Ten-Tec Equipment" <tentec@contesting.com>
Sent: Friday, August 12, 2005 8:53 PM
Subject: Re: [TenTec] Omni VI+ Keying
No experience with the pulser. I have looked at my Omni VI (version 3)
keying envelope with my Tektronix 466 storage scope while sending a
string of dits from a Logikeyer K-3, with no weighting added, at about
20 WPM and the dits appear close to 50% duty cycle. I'll try it at 40
WPM and get back to you. And I'll take a look at the Bird 43 too. If the
keying is good up to 30 WPM it will be good enough for my style of
operation, so far.
DE N6KB
So if you bring your 'pulser' down below about 40 wpm, it
should work.
anything less than 100% duty cycle
on the Key Pulser is about 10% of the full-scale (e.g.
key-down) wattmeter reading. I haven't put the Omni 6+
on my O'scope yet, but it sure seems like it is truncating
the pulses from the Key Pulser significantly compared to
the Paragon. The keying speed of the pulser is 48 WPM
with a variably duty cycle (50 msec pulse repetition rate,
0 to 100% duty cycle).
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