Heathkit HW-101 User Manual

(V) Set the BAND switch at 21.0 and turn the MAIN
TUNING dial to read 21.2 MHz.
() Adjust the DRIVER PRESELECTOR contro! and the
FINAL TUNE and LOAD controls for maximum RF
output; then turn the DRIVER PRESELECTOR
control back and forth to see if this produces a
smooth peaking in RF output.
(VW if turning the DRIVER PRESELECTOR control
causes ragged changes in the RF outnut, readiust the
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position of, or bend, the free end of the driver
neutralizing wire to produce a smooth peaking i in RF
output (this is the white, insulated wire inserted in
hole VW of the RF Driver circuit board, as shown in
Figure 1-2, fold-out from Page 100).
(Vv) Set the BAND switch to 14,0 MHz and the MAIN;
TUNING dial to 14.2 MHz. As you did before on the ;
3.5 MHz band, peak the DRIVER PRESELECTOR ¢
and FINAL controls for maximum output. Compare j
4 the control settings at which maximum r relative Power |
output and minimum pl and minimum piate c current occur. Again adjust
/ the neutralizing capacit neutralizing capacitor ul until these points coincide. *
. This completes the neutralization.
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(4) Rezero the ALC position of the S Meter while :
receiving, with the BAND switch at 29.5. Then check .
to be sure the meter reads zero in each BAND switch .
If the S Meter does not read zero on any nosition
postion,
band, readjust the heterodyne oscillator coil for that :
ee ee eee eee eres cota
band, as directed in previous steps.
NOTE: The S Meter may rest below zero while you are
transmitting. This condition is normal.
CRYSTAL CALIBRATOR ALIGNMENT
ann
in the foliowing steps, the 160 kHz crysiai calibrator signal
is adjusted by “Zero beating” it against the accurate signal
from WWV on another receiver, or against the signal froma
standard broadcast station that is on a multiple of 100 kHz.
Zero beat will occur when a harmonic of the 100 kHz
crystal calibrator signal corresponds to the frequency of the
station tuned in on the external receiver. As zero beat is
sua CALSr POCCt Otat
approached, a tone will be heard that decreases in frequency
until it stops completely at the zero beat point; then the
tone begins to increase again as the dial is turned.
a C Rat
to
Meter, a Anariivata «a mant
accurate ali ignment
can be achiever by observing the S Meter as zero beat is
approached. When you tune close to zero beat, the S Meter
will start to pulsate. The closer you approach zero beat, the
slower the pulsations will become. At zero beat the
pulsations will stop. Use a “fast” AVC position, if one is
available.
IMPORTANT: For greatest accuracy, be sure to adjust the
crystal calibrator as close to zero beat as possible. A 20 Hz
error at the 100 kHz calibrator frequency, for example,
would cause a 740 Hz error at 3.7 MHz (where the 37th
harmonic of 100 kHz would be used for dial calibration
purposes; 100 kHz x 37 = 3.7 MHz; 20 Hz x 37 = 740 Hz).
In view of this. it is recommended that the c
rit
VIEW
ruetal
calibrator
T UMs, it iS recommended that tne Eystar wa
be adjusted to the 15 MHz signal of station Www.
nance lan ath amen thy
Connect a random fenygin of wire from tné antenna -
connection of the external receiver to the ANTENNA
connection of the Transceiver. If necessary, use one of
_ the phono plugs furnished, It can be removed later.
(i) Set the Transceiver controls as follows:
MODE switch - CW, LSB, or USB.
{ ,) Tune the external receiver to WWV, or a standard
broadcast station transmitting at a frequency which is
a multiple of 100 kHz.
) Carefully adjust the CAL XTAL trimmer capacitor (on
the bandpass circuit board) for a
external receiver. When WW’V is tuned in, the period
when no tone modulation is present allows the zero
beat to be more easily heard.
"zarn, heat’ in tha
zero beat in the
(4) Switch the Transceiver FUNCTION switch to VOX
and return it to CAL to be sure the external receiver S
Meter stays steady, thus insuring a true zero beat.
Remove the external receiver antenna wire from the
TUS & whit Foce:
ANTENNA jack on the Transceiver.
~~
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Heathkit HW-101 Specifications

General

Brand	Heathkit
Model	HW-101
Category	Transceiver
Language	English