Heathkit RA-1 - Introduction to the RA-1 Receiver; Heathkit RA-1 Receiver Overview; Resistor and Capacitor Identification Chart

Power
Requirements:
...eeceer
aren
eee
tn rs
eeeeneee
110-240v
AC,
50/60
c/s,
50
watts
For
Mobile
or
Furtable
Use
.......-
ae
eeae
ees
LT:-
Gor
lay
at
3,5
A
HT:- 250v at 65 mA
Auxiliary Supplies Available: .. ec esse eee r rece renee LT:- 6,3vAGatlA
HT:- 250v DC at 25 mA
Gabinet
Size:
ccc
ac
cases
rece
cone
naneneeee
seen
133"
wide
x
114"
deep
x
63"
high
Net Weight: ....ceencersenccnre sede ee en ene naee 18 lbs,
Shipping Weight:,.....cessseuseenacee sae eweneenae Zl lbs.
Gen|eral: cacvcececnar aes neeeerennansnersrarene ee 'S' meter zero adjust
Muting via RF and IF stages
Standby via power transformer secondary centretap return
Phone jack on front panel
Optional Extras: ccc e reece eee eee ee ewes 100 Ke crystal calibrator
Matching loudspeaker in metal cabinet
INTRODUCTION
The
Heathkit
Model
RA-1
Basic
Amateur
Bands
Receiver
is
designed
for
flexible
use
as
a
high
performance
econo-
mical
fixed
station,
portable
or
mobile
receiver.
:
Frequency
coverage
of
the
Receiver
is
limited
for
use
on
the
amateur
bands
160
to
10
metres,
Each
band
is
sep-
arately
calibrated
on
a
large
easy-to-read
slide
rule
scale.
The
dial
is
illuminated
and
provides
approximately
5"
of
band-spread
for
each
band.
A
slow
motion
drive
is
incorporated,
that
whilst
permitting
fast
traversing
af
the
bands,
allows
a
small
section
to
be
tuned
at
a
very
slow
rate.
The
Receiver
features
a
signal
strength
'S'
meter,
a
front
panel
dial
calibration
control
that
operates
in
conjunction
with
provisions
made
for
a
100
Kefs
calibrater,
a
tuned
RF
amplifier
stage,
2
half
lattice
filter,
adjustable
noise
limiter,
plus
many
other
features
desirable
on
an
amateur
receiver.
Provision
has
been
made
for
'Q'
Multiplier
input.
The
low-silhouette
styling
andthe
green-grey
colour
combination
will
prove
an
attractive
addition
to
any
surroundings.
RESISTOR
AND
CAPACITOR
IDENTIFICATION
CHART
(see
Circuit
Diagram)
Cl
..
4-20pP
|
cal...
5-25
pF
1C41.,
.005
oF
.
25
pr
|
RIB
..
1K
5
..
G2
..
4-20pF
|
C22,,
5-25pF
(C42...
.1pF
|C62..
.005pF
|
R16...
100K
R36...
220K
C3).
10660
pF
|
C23...
.01
pF
C43...
.005
pF
1063
-O0O5
pF
|
R17
..
108
R37
..
100K
C4
..
6-25
pF
C24...
20,5
pF
)C44..
.005
uF
}C64..
,005
pF
|
RIS...
4702
R38.,
220K
C5
4.
4-20pF
|C25..
.0lpF
|C45..
.005pr
C65...
.005
uF]
RI9..
33K
|
R39...
220K
|
Cé
..
4-20pF.
|
G26...
.0ipF
|
C46...
i
pF
R20...
5.6K
R40.,
100K
G7
..
6-25
pF
|
C27.,
.01
uF
C47...
,005
uF
je
1.
220K
R21.,
47K
|
R4i..
47K
|
C8
.,
6-25
pF
|
c2a..
lyr
[c48..
.005pF
[R2
..
270
R22...
22K
R42...
47K
C9
4.
6-25
pF
|
C29..
100prF
|C49.,
200pF
[R3
..
A¥OM
|
R23.,
2.2M
R43...
47K
C10...
6-25
pF
|
C30.,
1SpF
|C50..
200pF
[R4
..
33K
R24...
1M
R44...
2,2K
Gll.,
6-25
pF
G31...
87
pF
c51..
15
pF
R5
.
2.2K
R25...
5K
R45
,.
220K
Gl2..
6-25
pF
|C32,.
.0lpF
|C52..
.01uF
|R6
..
220K
R26...
560K
|
R46...
102
|
Ci3..
15
pF
C33...
.01
uF
C53...
25
pF
R?
..
27K
R27...
2708
R47...
OOK
C14
,.
8&7
pF
|
C34
,.
20
pF
G54...
.005
uF
[Rs
1802
R28...
1.5K
|
R48
..
IK
|
Cis...
100pF
|
C35...
.0luF
|C55..
60nF
[RO
..
3K
R29...
220K
PCl.,
2K
lin
C16).
.
3-gang
O36...
.0l
pr
|C56..
75
pF
R10...
33K
R30,,
As
req'd.|
VR1.,
5K
lin
C17},.
22t224+22
|
C37...
100
pF
C57
.,
20
pr
Rll...
1K
R31...
1K
VR2Z..
10K
lin
C18)...
wariable
C38...
3
pF
C58...
20
pF
R12...
3.9K
R32...
2K
VR3..
500K
log
C19...
5-25
pF
|
C39...
20.5pF
|;C59..
7.5
pF
R13...
3308
3s
a.
2K
|
Xl
o..
1.6197
crystal
5-25
pF
C40...
200F
c4éo
7.5
pF
Rlda
ATE
R34
,,
5K
K2
=
..
1.6214
crystal
GLOUCESTER
CD
AYSTROM_L
TD.
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