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Figure 4-2. Split frequency operation with
DX station being received on main receiver
via VFO A, subreceiver monitoring of pileup
and transmit frequency on VFO B.
OPERATING THE INTERNAL ANTENNA
TUNER (if installed)
Your ORION II may be equipped with an
internal automatic antenna tuner. If
installed, the tuner is active on the ANT 1
jack only, and has a load impedance range
of 6 to 800 ohms (up to 10:1 SWR).
The tuner can be enabled or disabled from
the menu system. The default condition is
to have the tuner enabled. To enable or
disable, press MENUS then select the TX
menu. The first line item in the TX menu is
Internal Tuner. Use the MULTI knob to turn
the tuner on or off.
The tuner is activated by pressing the TUNE
button on the front panel. The rig will
transmit a keydown CW carrier at
approximately 20 watts output. The tuner
will activate and tune. When finished, the
CW carrier will stop and tuned will appear
on the screen just above the sub receiver s-
meter (where SWR is normally shown).
The tuner will usually stop at a value of 1.5:1
SWR or lower. Occasionally it may present
a slightly higher SWR after tuning. This is
normal, and the transceiver will still transmit
at full output power with no foldback.
The tuner does not automatically reactivate
when presented with a higher SWR after
changing frequency. If the tuner was tuned
on 14.025 MHz and you later moved to
14.200 MHz, the tuner may require re-tuning
and can be activated again with the TUNE
feature. However, as the internal tuner in
ORION II is an L-network (assuring
broadband matching) you may find the
566 manual
Part #74410
Printed in USA
range of the tuner when tuned to be larger
than that found on HF transceivers from
other manufacturers that use a Pi- or T-
network tuning arrangement.
There is no memory feature; the tuner will
not retain the last setting for a particular
band or frequency.
CONNECTING AN EXTERNAL LINEAR
AMPLIFIER
Whether you have an amplifier that is full
break-in, and how the full break-in is
accomplished, will determine the method for
connecting the linear to ORION II.
Two sets of keying outputs are provided for
the two available antenna jacks on the radio.
AMP KEY 1 and TX OUT / TX EN 1 are
used for a linear connected via the ANT 1
jack. AMP KEY 2 and TX OUT / TX EN 2
are used for a linear amplifier connected via
the ANT 2 jack. RF appears approximatel
15 mS after closure of either AMP KEY 1 or
AMP KEY 2.
Non-QSK linear amplifiers or QSK linears
that do not employ the use of a keying loop
are keyed from the AMP KEY 1 and AMP
KEY 2 jacks (see (66) AMP KEY 1 and (68)
AMP KEY 2 in chapter 2). Connect the PTT
keying line of your linear amplifier to the
AMP KEY 1 or AMP KEY 2 jack as desired
using a shielded cable with RCA-style male
phono connectors at each end.
ORION II is equipped with a QSK delay
feature accessible via the CW MENU that
operates on both the AMP KEY 1 and AMP
KEY 2 connections and the TX OUT / TX EN
1 and TX OUT / TX EN 2 keying loops. This
will allow you to set the amount of delay
between CW characters desired. Also see
the description in chapter 3 under (CW) CW
MENU.
NOTE: The external AMP KEY lines should
not have applied to them more than +100V
(output inactive) nor should it draw more
than 250 mA (output active). Many older
linear amplifiers like those manufactured by
Collins, Drake, and Heathkit have a higher
voltage on the keyline. Such amplifiers
require a relay or transistor switch between
either ORION II AMP KEY jack and the
amplifier PTT keyline. If you are unsure if
your amplifier is suitable, please consult the
Version 4 – October 2006
38
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