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FOOTWARMER AMATEUR RADIO AMPLIFIER
The
Hy-Gain
Footwarmer
amplifier
of advanced
design.
transistors
in a tuned grid tuned plate
cation
of AM, FM, CW and SSB signals.
The Footwarmer
is designed
installation.
It has a built-in
over
relay,
which
operates
nections,
making
it perfect
nO
transceivers
having
external
The
Footwarmer
has
been designed
suppress
radi ation that may cause tel evi si on interference.
TVI
problem
has
been
given
design
and the layout of the chassis.
some types
of TVI that
cannot
amplifier.
This
is particularly
In such cases,
a good commercial
mended.
Carefully
remove the Footwarmer
Examine
it closely
for signs
spection
shows
damage
contacted
immediately
and a claim filed.
The responsibility
for safe delivery
The responsibility
of obtaining
ORDER NO.
644
Ampl ifier
is a p[ecision
It utilizes
two tubes,
circuit
for ampl ifi-
for
117v AC 60 cycle
automatic
antenna
change
without
special
external
for operation
with
low power
ampl ifier
control
circuits.
and constructed
full
consideration
in the
There are, however,
be prevented
within
true in weak signal
low pass filter
is recom-
Amplifier
from the carton.
of shipping
damage.
the
del iveri ng carrier
must
rests with
the carrier.
reimbursement
rests
INSTALLATION
OPERATION
built
Height
(including
two
Width
Depth
Construction
base
Frequency
Range
con-
Types of Emission
Power Output
Dri ve Requi red to Trigger Antenna
Max Drive (unmodulated
(amplitude
to
(ampl itude modulated
Input
Impedance
Qutput
Impedance
the
Antenna
Switching
areas.
Power Requi rements
Cable Connector
SECTION II
UNPACKI NG
you.
Proillpt
action
does not cover malfunction
improper
handling
If in-
be
with
&
INSTRUCTIONS
feet)
'"
"
,
Lightweight
aluminum
rugged steel cover
Amateur
AM, FM, CW, SSB, DSB
200 watts
AM with fu II upwa rd
Rei ay
carrier
and FMi
modulated
carrier)
peak)
(unbalanced)
,
50 ohms nominal
(unbalanced)
Automatic
RF sensing
Data
Input & Output requires
wi II speed adj ustmeht.
or damage which
by a carrier.
59/16"
,
14"
1/2"
11
chassis
with
10 meter band
modul ation
1 watt
5 watts
3.5 watts
, 14 watts
PEP
50 ohms fixed
provided
by
circuit
117v AC
PL-259
Our warranty
is a result
of
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Table of Contents
Related Manuals for Hy-Gain 644
Summary of Contents for Hy-Gain 644
- Page 1 INSTALLATION & ORDER NO. OPERATION INSTRUCTIONS FOOTWARMER AMATEUR RADIO AMPLIFIER Hy-Gain Footwarmer Ampl ifier is a p[ecision built 59/16" Height (including feet) '" " amplifier of advanced design. It utilizes two tubes, Width 14" transistors in a tuned grid tuned plate...
- Page 2 The side control in the cover is used for tuning the ampli- Always use a good peak reading watt meter such as the fier. The amplifier is pretuned at 27.575 MHz and the tune Hy-Gain A when trying to read Modulation peaks. control wi II allow...
- Page 3 Always use a good peak reading watt meter such as the lation can carry intelligence. Running higher carrier power Hy-Gain 421A when trying to read modulation peaks. and lower modulation is a detriment rather than an asset.
- Page 4 I hold the shipment and advi se you of costs, wh ich you returns should be made to: can then send. Hy-Gain Electronics Corporation 3 - Or, upon your written authorization, we will ship COD 8601 N.E. Highway...
- Page 5 Corporation"s sole liability is the remedy of any defect for by the original owner at the time of purchase to val idate ninety days. Hy-Gain Electronics Corporation is not respon- the warranty. sible for personal injury or property damage resulting from...
- Page 6 PARTS LIST Symbol Description Part No. Symbol Description Part No. C101 2.2 pf Disc Cap D101 1N270 Diooe 721609 765722 C102 20 pf Capacitor D102 1N270 Diode 725717 765722 C103 .1 mfd D103 721574 1N5054 Diode 765713 C104 Load Capacitor D104 "...
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