OK Carl, now I fully understand.
Well it seems to me Ten-Tec could have just ganged these two together.
I guess the initial TX delay is a fixed value like it is on the other TT
(I made up this name to mean the time the TX waits for the Amp to switch).
I thought maybe because there were two controls, one of them would adjust
the initial delay.
As I said earlier, the amp seems to be switching "on" just fine so I'll use
the EXT T/R to adjust the desired hang time (and forget about the Jupiter's
(Scott, if you're reading this, I know you are shaking your head, but we
older guys sometimes need a rest from the hectic of QSK. I ran home-brew
full QSK 40 years ago, but I don't always need it now!).
Who knows, Carl? Maybe one day I'll come up with a question to which you do
not know the answer ;-)
[mailto:firstname.lastname@example.org]On Behalf Of Carl Moreschi
Sent: Wednesday, November 10, 2004 1:12 PM
Subject: Re: [TenTec] Questions about Jupiter
To answer your first question, CW QSK DELAY has nothing to do with keying
the amp. This is the delay before the receiver comes back on after
transmitting. I assume you have EXT T/R connected to the amplifier's keying
line. The EXT T/R value adjusts how long this line stays active after
keying ceases. Setting this to a long value reduces how often the amplifier
relay comes up and down.
Carl Moreschi N4PY
----- Original Message -----
From: "NJ0IP" <Rick@dj0ip.de>
To: "Tentec@Contesting. Com" <email@example.com>
Sent: Wednesday, November 10, 2004 11:58 PM
Subject: [TenTec] Questions about Jupiter
> Hey Guys,
> I added a Jupiter to my Ten-Tec collection.
> FIRST QUESTION:
> I'm trying to interface it to my linear.
> Well, actually it's working, but I want to "tune" the interface.
> Let me say that the Amp is a non-Ten-Tec amp, so no QSK loop.
> The Jupiter has two adjustments:
> 1. CW QSK DELAY
> 2. EXT TR DELAY
> I've played with both and can't seem to see any difference.
> Normally I would expect one to controll the delay the Jupiter
> allows the linear's TR relay to switch before transmitting the
> first dit, and the other to be the hang time before it releases
> the external TR relay to return to RX mode.
> Regardless of where I set either of them, the Henry SS750HF
> linear seems to transmit OK, including the first dit. I have no
> means to measure, but on an external RX, I can't notice any
> significant clipping of the first character.
> I've adjusted both controls up and down and they seem to do the
> same thing - affect the hang time.
> I have no way of measuring the delay time when activating the
> Can someone please explain to me the difference between these
> SECOND QUESTION:
> What does the "TX ROLL OFF" do?
> I didn't seem to find it in the manual.
> THIRD QUESTION:
> I feel a bit ashamed asking this one.
> This has been discussed many times, but since it wasn't accute, I
> paid little attention.
> What is a good external loudspeaker to use with the Jupiter.
> This rig is my SSB rag chew rig, not my CW contest rig, so
> fidelity is important.
> FOURTH QUESTION:
> Has anyone had any experience using external mic-mixers to
> improve TX audio fidelity?
> If so, what have you used? I'd like to get into that.
> As for my evaluation of the unit, well I would say I prefer the
> Jupiter for Monday through Friday use, and the Orion on weekends
> when the bands are overcrowded! Clearly the Jupiter is a LOT
> easier to use and I'm lazy.
> Thanks for any tips.
> DJ0IP / NJ0IP
> Munich, Germany
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