[TenTec] Re: TenTec Digest, Vol 15, Issue 69

[Carl Moreschi]

The AMP KEY  lines should come up immediately.  This does not need to be
user settable. This gives 20 milliseconds for the amp relays to transfer
before power is applied.  The delay for how long the amp key line stays up
after keying is over is adjustable from 0 to 1 full second.

Carl Moreschi N4PY
Franklinton, NC
----- Original Message -----
From: "JerryVan" <jerryvan at sssnet.com>
To: <tentec at contesting.com>
Sent: Friday, March 26, 2004 4:40 PM
Subject: [TenTec] Re: TenTec Digest, Vol 15, Issue 69


In addition to the need to lengthen an element to compensate for the leading
edge delay as Carl describes I am wondering if it would be worthwhile to
suggest to TT that the leading edge delay be adjustable for us AMP KEY 1 and
AMP KEY 2 key line users?  The delay is longer that I would prefer.  I've
measured my delay to be about 24-25 ms which seems to jive with Sinisa's,
YT1NT/VA3TTN, very excellent and complete measurements.  It would be nice, I
believe, to allow the leading edge to be user adjustable from 5 ms to a max
of 20-25 ms. which should track the trailing edge delay as described by
Carl.

Jerry  N8BM


  Date: Thu, 25 Mar 2004 18:54:30 -0000
  From: "Carl Moreschi" <n4py at earthlink.net>
  Message: 3

  No, the QSK delay has nothing to do with this.  All the QSK delay does it
  change the time the receiver audio comes back on after transmitting.  The
  amp relay delay time is controlled by "Ext T/R delay".  This is set from 0
  percent to 100 percent with 100 percent equaling one second.  This control
  sets the extra time the amp key line stays on after the key line goes off.
  It is used to keep the amp antenna relay from coming up and down for each
CW
  element.

  The keying problem That I was refering to in the earlier post can only be
  comtrolled insode the Orion firmware.  It relates to how long the
  transmitter actually transmits compared to how the CW key line is on.  The
  transmitter keys 20 milliseconds (that 20/1000 seconds) after the CW key
  line comes on.  In order to make up for this loss of 20 milliseconds, the
  transmitter should continue to stay on for 20 milliseconds after the key
  line goes off but it doesn't.  It only stays on for another 12
milliseconds
  making all CW elements short by about 8 milliseconds.  I see this as a
  firmware bug that should be corrected.

  Carl Moreschi N4PY
  Franklinton, NC
  ----- Original Message -----
  From: "Joe Giacobello" <k2xx at swva.net>
  To: <tentec at contesting.com>
  Sent: Thursday, March 25, 2004 3:17 PM
  Subject: Re: First dot (was Re: [TenTec] Orion in action)


  > Carl and others, I am a new Orion owner and I have been trying to extend
  > the relay delay (or on time) by increasing the "QSK delay" setting.  I
  > am practically at a 100% and still the delay is quite short, especially
  > for speeds below 20 WPM.  When you refer to holding "the keying output
  > for about 12 seconds", are you talking about this setting?  I presume
  > that this setting is the only way to control the CW delay for non-QSK
  > operation?  If so, it is a serious limitation.
  >
  > 73, Joe
  >
  > Carl Moreschi wrote:
  >
  > >Yes, they are all shortened.  In the tentec keying scheme, all dits and
  dahs
  > >are the first one.  The Orion needs to keep the keying held down for
  about 8
  > >milliseconds longer when the key line is released.  The current scheme
  keys
  > >the radio about 20 milliseconds after the key line is grounded but only
  > >holds the keying output for about 12 milliseconds after the key line is
  > >released.  This should be able to be corrected in a future firmware
  release.
  > >
  > >Carl Moreschi N4PY
  > >Franklinton, NC
  > >----- Original Message -----
  > >From: "Carter Grabarczyk" <k8vt at ameritech.net>
  > >To: <tentec at contesting.com>
  > >Sent: Thursday, March 25, 2004 12:58 PM
  > >Subject: First dot (was Re: [TenTec] Orion in action)
  > >
  > >
  > >
  > >
  > >>Tommy wrote:
  > >>
  > >>
  > >>
  > >>>And yes, there is some clipping on the first couple of dot on the
  > >>>Orion.
  > >>>Tom - W4BQF
  > >>>
  > >>>
  > >>Been reading about this topic for awhile. I also saw the keying
picture
  > >>in QST with the first dot shortened.
  > >>
  > >>However, I'm confused. With QSK, isn't *every* dot the first dot?
(thus
  > >>if one was shortened, you would think they would all be shortened).
  > >>
  > >>73/Carter/K8VT
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