Specifications

Alpha 9500 HF Linear Amplifier Operating Manual Alpha Radio Products
Setting Up the Amplifier Product Release 1
DOCNUMBER 9500
Document Issue 1, Revision 7
Page 5–10 June 2009
55
5
5.5 Set the Input Drive
You must set the transceiver output power properly. Virtually all damage
to date has resulted directly from severe overdrive. The amplifier requires
50-W drive for full rated output.
Damage caused by applying several-times-rated drive power to the
amplifier is not covered under warranty. Fortunately, most modern
transceivers maintain quite consistent output from band-to-band and
mode-to-mode when set up properly.
Procedure 5-5 Set the input drive
Step 1 Place the amplifier in standby mode on the desired band.
Step 2 Start with the minimum power and then adjust the transceiver output to
around 20 W. You can read the power on the 7-segment display.
CAUTION
!
CAUTION! It is not sufficient to set only the transceiver POWER or
RF PWR control. Several popular transceivers can generate RF
spikes of 200–300 W. Control of these spikes typically is done with a
knob labeled DRIVE (IC-781, FT-1000) or PROCESSOR OUT (TS-
940, TS-950). On SSB, when speech processing is not used, adjust
the MIC or MIKE controls. See the user manual for your particular
transceiver.
5.6 Connect the Transceiver
Procedure 5-6 Connect the transceiver
Step 1 Connect the transceiver.
The following is a list of popular transceivers and considerations for their
connection to the amplifier. For advice on other transceivers, contact
Alpha Radio Products as described in
Chapter 1, “Introduction.”
Table 5-1 Popular transceivers
Transceiver Connection and keying information
Icom RF —
T/R — Connection with the “Send” jack. For
information, see the transceiver user manual.