WITH BOTH ALC AND COMPRESSION
This procedure has worked well for me, giving
full power output and receiving good reports on both signal strength
and audio.
Page 34 of the 1.5K-FA manual says: "SPE
recommends, when using the ALC link, that the transceiver be set to
its maximum output power as the ALC will
automatically reduce the driving power to the optimum driving level." and
for SSB: "Regulate the "MIC GAIN"
of the transceiver until, speaking normally into the microphone, the signal
peaks
on the display and does not quite reach maximum
rated power." Also, "Keep in mind that, in some cases, if the ALC
link is active, the indication of ALC on the
transceiver display may no longer be indicative."
I had been setting up the IC7300 MIC GAIN and COMPRESSION as described in the IC7300
Owners Manual and
then adjusting POWER to the 1.5K-FA to get 1.5KW peaks. I was
getting frequent dropouts as it seems this was
overdriving the amplifier and it protected itself by cutting power. It was
made worse by increasing COMPRESSION.
I have found it works better for me to ignore the
setting of the MIC GAIN and COMPRESSION as described in the
IC7300 Owners Manual and to adjust the settings as
outlined in the 1.5K-FA manual with one significant difference
that the COMPRESSION is set before the MIC
GAIN. :
1. Set the IC7300 output power to
100. ◄-- NOTE: THIS IS ONLY FOR EXPERT
AMPS THAT
ADJUST THE DRIVE AUTOMATICALLY. FOR OTHER
AMPS SET TO NEEDED VALUE FOR THAT AMP
2. Set the MIC GAIN to zero and the COMPRESSION
to your preference. IC7300 audio seems better with
a minimum COMPRESSION setting of 1.
Personally for my voice, I like a setting of at least 5.
3. Slowly increase the MIC GAIN until the SPE output shows OCCASIONAL peaks of 1.5KW.
NOTE: If you change the COMPRESSION repeat, starting with a MIC GAIN of zero.
4. Adjust the IC7300 SSB Transmit Bass and Treble
controls to whatever is best for your voice.
◄--NOTE:
Increased COMPRESSION accentuates the Bass so decreasing the Bass is advised
along with perhaps
raising the bottom of the Transmit BW (TBW) to 200Hz. This of course
varies with individual voice.
Also I recommend that the TX DELAY be set to no less than 15ms.