Ameco PT User Manual

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AMECO
PREAMPLIFIER
MODEL
PT
The
AMEC0
Model
PT
Preamplifier
is a unit
that
may
be
added
to
most
existing
trans-
ceivers
in the
frequency
range
ot
l.B
to
54
MHzf
improving
the
gain,
noise
ftgure,
spurious
signal
and
image
rejection
of
the
receiver
section.
This
All-New
pf
ImgCO
Preamplifier
has
been designed
-oecifically
for use
with
a transceiver.
The
sophis-
ticated
control
circuitry
incorpoi '-t
permits
the
PT
to be
added
to
virtually
any
transceiver
without
modiflcation.
Ttre
fundamental
requirement
is
that
the
transceiver
have
control
circuitry
built
in
for
use
with
a
!'1near
ampl
if ier.
This
I
inear
ampl if ier
control
circuitry
is used
to bypass
the
preamplifier
during
transmit
mode
or
to control
the
I
inear
ampl
ifier dlrect!y.
When
the
transceiver
I
inear
ampl
ifier control
ci
rcuitry
actuates
the
relay
in
the PT,
additional
contacts
in ifr.-pf
-"ontiol
the
linear
so that loss
of linear
amplifier
facility
does
not
result.
The
PT
consists
of a
tuned RF
amplifier,
covering
all
the
amateur
bands
from
150
throuqh
5
meterc
sndi in
oiiili,-::,,
lll
..i:.
l;.ig,:
,Ioadcasts,
as
wel i
as
otlrgr
services
within
this
frequency
range.
The
Mo"del
PT
employs
a
low
noise
frame grid
tdbei
pro-
viding
a noise
figure
of 1.5
to'3.5
db,
over
the
frequency
range
of i.B
to
S4'nnz.
The
PT
Preampl
if
ier
wi
ll be
found
especial ly
ef
fective
wiir,
tr,or"
transceivers
em-
ploying
the Pl
output
network
of the
transmitter
section
as
the
receiver
RF
stage
input.
Most
transceivers
of
this
type
begin
to
suffer
a
noticeable
decrease
in
sensi-
tivity
on
l5
meters
and
especiatly
on 10. The
PT
will
be
most
beneficial
on
these
bands
and the inclusion
of 6
meters
makes
it
r.rsable
with
those
second
receivers
having
a 6-meter
range
or with
the
newer 6-meter
single-sideblna
tnansceivers.
ln addition,
the
output
of
the frame grid
RF
amplifier
seition
feeds
an
isolation
net-
work
with
two
outputs.
One
output
is used
to
feed
the
transceiver
input
when
re-
ceiving,
while
a
second
output
is
used
to feed
a
second
receiver,
which
may be
of the
general
coverage
or
amateur-band-only
type. The
built.-in
relay
of
the
pT
also
includes
a
set
of
contacts
with
three
terminals
brought
out
to
tfie
reai
of
the
cabinet
so that
either
normally-open
or
normally-closed
receiver
mutinglmay
ne
employea
in
the
sec-
ond
receiver,
whenever
the
transceiver
transmits.
The
PT
is designed
specifical
ly
for
I
I7-vol
t 60-cycle
operation.
The
input
and
output
impedances
are
nominally
50
ohms
to
match
most
popular
types
of
amateur
installations.
The
input
and
output
impedances
of the
pT
are
not
critical
and'
therefore
no
adjustments
or modifications
are necessary
with
other
impedances.
The
AMECO
PT
is
truly
a
great
step
forward
in
increasing
the flexibility
of a trans-
ggiver
equipped
amateur
station.
The
use
ofra
second
reieiver
with
its
extremely
Ax-rble
operating
characteristics
will be greatly
appreciated
by
the
contest,
DX,
?y-Brffiious.operator,.both
with
cw
and
single
sideband.
once
the
operator
has
A DIVISION
OF
AEFTOTRON,
INC
RALEIGH,
N.C
INSTRUCTIONS
ustomed
to
a typical
setup using
a
transceiver,
together
with
a
pr
and
a
$v"r,
he
will
wonder
how
he
ever
got
along
wiihout
it.

Ameco PT Specifications

General

Brand	Ameco
Model	PT
Category	Amplifier
Language	English

Summary

AMECO Preamplifier Model PT

Installation

Installation of a Second Receiver

Installation Diagram

Switching Function Diagram

Operation

Alignment Procedure

Replacement of the Fuse/Resistor

Parts List

Schematic Diagram - Model PT Preamplifier

Warranty