Specifications

Page 11
Copyright 2006 Robert A. Larson, KC9ICH
1011D PRELIMINARY CHECKS AND ADJUSTMENTS
1) Locate the P.A. compartment and remove the packing material from the P.A. tube if not previously accomplished. (This requires
removal of cabinet cover).
2) Set all front panel controls and switches as follows:
a) A.F. Gain Control fully counterclockwise (A.C. Power off in this position).
b) Mode Switch to USB.
c) R.F. Gain Control fully clockwise.
d) Band Switch to 28.5 XCV position.
e) Dial setting 28.7 MHz.
f) ANL Switch OFF.
g) Spot Switch OFF.
h) Dial Set Knob 12 o’clock.
i) Preselector 3 o’clock.
j) Mic Gain Control fully counter-clockwise.
k) Carrier Insertion fully counter-clockwise.
l) P.A. Tune 12 o’clock.
m) P.A. Load 12 o’clock.
n) Meter Switch in the S-Meter position.
o) Tune Receive switch in Rec position.
p) P1ug Microphone into Mic Jack.
q) At this time, all front Panel controls are preset. No power should be applied to the set.
3) Rear Panel Preset Instructions:
a) Connect a 50 ohm dummy load or an antenna through a 50 or 75 ohm feed line to the antenna connector.
b) A good earth ground should be connected to the chassis ground stud bolt on rear panel.
c) The A.C. power cord should now be connected to the rear Power Connector. Plug AC. Cord into 117V A. C. wall
outlet.
WARNING
The cabinet cover should be in place whenever the power cord is connected to the unit as dangerously high voltages are present at the
plate connection of the power amplifier and other locations with in the unit. Serious injury or death may occur if personnel come in
contact with these voltage sources.
At this time the set is still turned off and all controls are preset, antenna or dummy load is now connected to the Set and power cord is
attached to the set.
4) Turn A.F. Gain Control clockwise to about 10 o’clock. Power will now come on and the dial light should light. Let the set warm-
up for
about 5 minutes before proceeding to the next Step.
P.A. BIAS CURRENT CHECK
The P.A. bias has been preset at the factory. However, since it is extremely important that it be set correctly at all times, a check
should be made as follows:
1) Perform Preliminary Checks outlined above.
2) Push the Meter Switch down to read P.A. Cathode current.
3) At the same time, key your microphone.
4) While looking at the bottom scale on the front panel meter, note the meter reading. It should be on or near the triangle (40
mA).
5) If adjustment is required, use a small screwdriver to turn the P.A. Bias control on the rear of the set. A small triangle delta
symbol on the meter indicates the proper setting of 40 mA. (Be certain that the mode selector is still in the USB position).
The P.A. Tube Bias idling current has now been adjusted. No further bias adjustment should be required. However, it is
wise to always check the P.A. Bias before the first transmission of the day. The unit is now ready for tune up on the air.
TRANSMITTER TUNING PROCEDURE
Up to this point, all controls and the P.A. Idling Current have been preset. The following steps explain proper transmitter tune up
procedure.
1) Ascertain that all front panel controls have been preset correctly as instructed in “B” of the Preliminary Checks.
2) With the antenna connected, locate a clear frequency on which to tune up.
3) Push both the Tune / Rec switch and the P.A. Cathode / S-Meter switch down at the same time. (The transmitter will now be
keyed). Peak the preselector for maximum P.A. Cathode Current on the meter as quickly as possible.
CAUTION
Key transmitter for not more than ten seconds at a time and allow ten seconds to elapse between keying periods while tuning up
transmitter.