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Re: [TenTec] Omni VI+ Keying

To: Discussion of Ten-Tec Equipment <tentec@contesting.com>
Subject: Re: [TenTec] Omni VI+ Keying
From: Ken Brown <ken.d.brown@verizon.net>
Reply-to: Discussion of Ten-Tec Equipment <tentec@contesting.com>
Date: Sat, 13 Aug 2005 17:27:37 -1000
List-post: <mailto:tentec@contesting.com>
Hi Michael,

I don't know what version firmware is in my Omni VI version 3 radio. Maybe it has the "microchirp". No one has complained about it to me. I'll try listening to it with another receiver to see whether I can detect a chirp, and I'll also try listening to harmonics to exaggerate the chirp. As for as the duty cycle goes, I am seeing pretty darned near 50% duty cycle when the internal keyer speed is at maximum. Gives a dit plus space duration of about 43 mS. The dits are 20 to 24 mS long depending on what part of the envelope you call the end of the dit. The rise time of the dit envelope is about 2 mS and the fall time is about 4 mS.

I see pretty much the same using external keying from my Logikeyer K-3, although they way I have it set up right now it does not go as fast as the internal keyer.

Do you have a number I can use to convert dit plus space duration directly to WPM?

When I look at it with the Bird 43 and set the power to 90 watts key down (I can't quite get 100 watts indicated, so I am turning it down to 90 watts) the string of dits measures 30 watts. The Bird 43 scale is not linear, so this is about 50% deflection even though not 50% power reading.

DE N6KB



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