Lytle & Canon 6AWC3 Schematic

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Manufacturer:Lytle & Canon

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Page 1:




Installing The Outside Antenna.

The built in loop antenna on your Radio is highly efficient for the re-
ception of local or nearby stations on the broadcast band. Short-wave re-
ception will require some sort of an antenna connected to the set -- 5 to
iS ft. of wire stretched on the floor and connected to one of the antenna

However, in locations where reception with the built in loop antenna is
not satisfactory, a good outside antenna should be installed. The total
length of the outside antenna, including'the lead-in, should be from SO to
60 ft. for good operation, and it should be as high as possible. Keep the
antenna away from metallic objects such as other wires, guttering, grounded
fire escapes, etc.

When the antenna is connected to a receiver, the antenna trinmer on the
back of the chassis base must be readjusted. To do this, connect the an-
tenna to one of the antenna terminals in the rear of the set; tune in a
weak station near 600 kc. (60 on the dial); and adjust the trimmer screw
with a screw driver until the signal is loudest. Antennas shorter than
about 30 ft. should be connected to the SHORT Ant. clip; those much longer
than this will need to be connected to the LONG Ant clip. If in doubt
which to use, try both adjusting the trimmer for each, and use the connec-
tion which gives the best performance.

A good ground connection should always be provided when an outside an-
tenna is used, and sometimes it is useful in reducing noise even when no
antenna is connected to the set. Connect a wire from the GND clip in the
rear of the receiver to a convenient water pipe, radiator, or conduit. If
none of these are available, a wire may be run to a metal stake or pipe
driven into the ground to a distance of h to 6 ft.

PREPARing Record Changer For Operation.

The record changer has been mounted tightly to the cabinet shelf ( or
drawer bottom in the Console Model) to prevent damage in shipping. A string
tied around the needle arm post holds the drawer closed in the Console
Model. Cut this string BEFORE trying to open the drawer. Before attempt-
ing to use the phonograph, loosen the three mounting bolt nuts on the UNDER
SIDE of the shelf or drawer until the record changer is floating on its
shock absorbers. (These mounting bolts are located on top of the rectan-
gular base.) Now, remove the two rubber bands that hold the pickup arm se-
cure and remove the cardboard holder. Remove the cardboard disc from the
turntable. Finally, remove the needle guard from the pick-up arm by grasp-
ing the guard with your thrum and forefinger at the rounded ends and pull-
ing firmly but gently downward.

Broadcast Band (535 - 1620 Kilocycles); The broadcast band is calib-
rated in channel numbers. Add a zero to the dial number to get the kilo-
cycle number.

Short-wave Band (9 to 15.6 Negacycles) ; The short-wave band is calib-
rated in megacycles.

?John F. Rider

Page 2:



Tone Control and Phono-Radio Switch:

Turning the knob all the way to the right throws a switch which cuts
out radio reception and connects the phono-jack on the rear of the chassis
base. Phonograph records may then be played through Model 6Ah7WT by con-
necting any record player to this jack. To restore radio reception, turn
the tone knob all the way to the left to throw the Switch back to the
radio portion.

Band Switch:

This knob has two positions. The position to the right (SW) switches
the tuning to the short-wave band. The position to the left (BC) provides
reception on the regular broadcast band.


Stringing the Dial Drum.

1. Turn the gang condenser to FULL CLOSED position.

2. Attach the looped end of the line cord assembly (Part #NCA103) to
lug "D" as shown in the diagram.

3. String the cord through the opening on the rim of the pulley, down
behind the dial and under the tuning shaft.

h. Take four turns around the shaft in a clockwise direction as viewed

to be Ture that none of the turns lie on top of one another to avoid sloppy
tuning .

5. Continue stringing the cord from the tuning shaft up to and around
the small pulley "C" at the upper left hand corner of the dial bracket (as
viewed from the front of the chassis). In going,from the shaft to pulley
"C", be sure to lead the cord between the bracket mounting leg and the tone
control shaft.

6. Now, string the cord along the upper edge of the dial bracket to
pulley "B" at the upper right hand corner of the bracket. (As the cord
passes along the top of the dial, be sure to thread it through the opened
prongs on the dial pointer.)



7. String the cord over the pulley "B" downward around pulley "A" (at
the lower right hand corner of the chassis as viewed from the front), up
through the opening on the rim of the dial pulley, and hook to the tension
spring which has been hooked over lug "E" on the pulley.

from the front of the chassis, progressing outward from the chassis. (Check

?John F. Rider

Page 3:


MODELS 6A 7w'r,

The stringing is now completed. To fasten the pointer to the cord:

l. With the gang condenser still in CLOSED POSITION, slide the pointer
to the last dot at the left hand end of the BC band (as viewed from the
front of the chassis).

2. Pull the cord out from the prongs in the pointer and wrap a small
pieee of l/h" tape around it at the point where the pointer pronts come.

3. Re-insert, and bend the two end prongs backward over the tape and
middle prong forward. This festens the pointer securely to the cord in the
correct position, completing the stringing of the dial.


In order to string the tuner, remove tuner assembly from the chassis
and remove the dial drum from the condenser shaft with a soldering iron.
In doing this, it is important to note the position of the dial drum rel-
ative to the condenser plates, in order to reassemble properly.

Part #WCAlOZ --cord and core assembly is used for stringing the tuner.
Proceed as follows:

l. Remove the S.w. coil from the fuse clip brackets.

2. Insert the S.W. coil as shown in the diagram, attaching the tuner
spring to loop "E" and allowing the spring to lie loose until it is to be
stretched around the pulleys and connected to the right hand hook of the

3. Replace the S.w. coil in the fuse clips in the approximate position
shown in the diagram.

h. Rotate the gang condenser to FULL OPEN position (counter-clockwise
looking from above as in the diagram).

5. Pull the core by means of the cord fastened to the left hand hook,
until the left end of the core is exactly l/h" from the first tooth on the
larger radius of the cam (tooth "A" with cam rotated 1800 from position
shown on the diagram).

6. Proceed with the stringing as shown in the diagram, making sure that
the cord is not unduly stretched or left loose between any of the teeth on
the cam.

When the Stringing has been completed around the cam:

7. Lay the B.C. core, which has been attached to the other end of the
cord, on the bracket and remove the BC coil from the clips that hold it.

8. Insert the B.C. core in the coil form and push it through (with a
small wire) until the bare hook comes into view at the other end.

9. Replace the B.C. coil in the approximate position shown on the dia-

lO. Recheck the gang--it should be in FULL OPEN position.

ll. Grasp the tuner shaft firmly to prevent it from rotating. String
the cordloop with the spring attached, from the right end of the S.w. core
around pulley "B" only. Hook the spring to the right hand hook on the B.C.
core.) (The spring should be barely accessible at the right end of the B.O.

12. Release_the gang condenser (being sure it is still in FULL OPEN
position), and stretch the spring around the second pulley "C", Be careful
not to damage the spring during this operation.

13. Adjust the B.C. coil to its correct position by sliding the coil to
a point l l/h" from the right-hand end of the B.C. core to the beginning of
the coil winding. The tuner is now strung and ready for adjustment of the
S.W. coil position.

?John F. Rider

Page 4:


Turn the gang condenser to its FULL CLOSED position. Insert a piece of
wire which has been marked 5/8" from one end into the coil form until it
hits the S.W. core. The distance from the left end of the coil form to
the left end of the core should be 5/8". If this measure is not within
1/32", there has been some error made during the stringing procedure or the
parts are defective. Carefully review the steps taken. If no apparent
error is in evidence and the measure does not fall within this tolerance,
get in touch with your Lytle & Canon firm who will furnish you a complete
tuner subiassembly already strung.

If the final measure was within the tolerance, the tuner is properly
strung and ready to be replaced on the chassis base. Solder the dial drum
back on, making sure that you replace it in the same position with respect
to the gang plates as it originally was.

WARNING: when removing the B.C. and S.W. coils from the fuse clips, be
careful not to break the fine wires or loosen any soldered connections.

NOTE: The S.w. core is distinguished from the B.C. core in that the
S.W. core has a somewhat lighter color and a more satiny surface.

To remove the tubes in the 6Ah7wTR model it is necessary to remove the
record changer first. To do this, remove the three mounting screws in the
base of the changer. Disconnect all "plug-ins" as described. Lift the
record changer out of the cabinet. Next, remove the three screws holding
the metal cover in front of the changer and remove this cover. The tubes
should now be easily accessible without removing the set from the cabinet.
If not, proceed as described in the preceeding paragraph and remove the
chassis from the cabinet.


I.F. Alignment

whenever one or both I.F. transformers (T3 and Th) are chan ed, or the
wiring associated with these transformers or with the 65A? or SF? tubes is
disturbed, it is imperative to realign the I.F. transformers. Proceed as

1. Connect an output meter, a.c. voltmeter, or other suitable instru-
ment across either primary or secondary of the output transformer, T5.

2. Turn the volume control to its maximum (clockwise); and turn the

3. Connect a signal generator from the input grid (pin 8) of the 68A?
tube to ground, and feed in a modulated signal at MSS kc., using as small
an input signal as possible yet maintaining a convenient deflection on the
out ut meter.

. Adjust each of the h screws on top the I.F. transformers for max-
imum output, at the same time decreasing the input from the signal generator
to be sure to get a true maximum reading.

When this is completed, the I.F. transformers are in alignment.

When service operations of any sort have been performed on the antenna
coil, interstage coils (Tl, T2), loop antenna, gang condenser-oscillator
assembly, oSG? tube, or circuits associated with any of these, it is im-
portant to realignithe R.F. circuits for best performance

?John F. Rider

Page 5:


Shortened Alignment Procedure

If the service operations have not involved the gang condenser-oscill-
ator assembly or its associated capacitors (018, 019, 013, 01h, a short-
ened procedure may be used, as follows:

1. Connect the output meter and check the I.F. alignment.

2. Using broadcast stations as a guide, check the calibration of the
broadcast and short-wave bands. (If no stations are available, use a sig-
nal generator--it is less likely to be accurate however, NWV time signals
on 10 mc. and 15 mc. can sometimes be used to check the short-wave band
calibrations). If the calibration is not reasonably close, the complete
alignment procedure will be necessary. If satisfactory, proceed to connect
the signal generator or multivibrator from GND terminal to the LONG ANT
terminal on the loop frame.

. Turn the band switch to BC, and set the dial to about 600 kc.

. If a multivibrator is used, adjust the loop trimmer 06 for maximum
output. If a signal generator is used, tune in-the signal at about 600 kc.
and adjust 06 for maximum output.

5. Turn to 1500 kc. and tune in a signal.

6. Adjust trimmers 07 and 0h for maximum output.

7. Go back to 600 kc. and disconnect the signal generator or multi-
vibrator from the LONG ANT terminal, but leave the wire from the signal
source in the vicinity of the antenna terminals. Turn up the signal source
output so that the signal can be heard and readjust C6 for maximum output.

8. Reconnect the lead from the signal source to the SHORT ANT terminal
through a 600 ohm resistor.

9. Turn the band switch to Sw and the dial to 15 mc. Tune in a signal
from the signal source at this point. (Be sure you have the correct sig-
nal and not an image.)

10. Adjust1rimmers C2 and 03 for maximum output, "rocking" the tuning
control as you do so.

The receiver is now in alignment for reception with the loop antenna. If
an external antenna is used, the loop trimmer 06 must be realigned with
the actual antenna connected as described in the installation instructions.

Complete R.F3 Alignment Procedure

It is strongly recommended that the receiver be returned to the factory
for any repairs involving replacement or any adjustment of the gang cond-
enser-osicllator assembly (tuner assembly) other than adjustment of trim-
mers 0h and 07. If, however, it has been necessary to replace the gang
condenser-oscillator assembly or capacitors 018, 019, 013, or 01h in the
field, the alignment procedure is as follows:

l. Set the dial pointer so that it lines up exactly with the left hand
and mark when the gang is fully closed.

2. Connect the output meter, Turn the volume control to its maximum
and the bandswitch to BC. Feed in the signal generator on the grid of the

3. Check the I.F. alignment. Set the signal generator to 1000 kc. and
check the generator calibration against a broadcast signal in place of the
generator . Adjust 019 so that the receiver is on calibration at this point

h. Throw the bandswitch to Sw. Set the signal generator to 12 mc. and
adjust 018 so that the correct signal (the one which comes in at the higher
fre uency on the receiver dial )is right on the 12 mc. mark.

g. From here on, follow the shortened procedure until the alignment of
the receiver is complete.

?John F. Rider

Page 6:

?A?E 20-6 LI] LE & CANON

MODELS 6A vwfr,

F M Operation

Turn the radio on by turning the volume control knob to the right.

right. Wait a few seconds for the tubes to heat.
knob clockwise until a click is heard.

FH Tuning Knob:

Turn the FM tuning knob until the station is heard.
slowly back and forth across the station desired. The station may be
heard in three positions -- the correct position is
the signal is the clearest and strongest.
duce it by means of the VOLUME CONTROL.

For reception of distant stations,
favorable to FM reception, install an outside FM dipole antenna,
with a 300 ohm flat lead-in. Disconnect the built in antenna,
the wires from terminals #l and #3 on the tuner chassis.
in wires of the outside antenna to the same terminals.

Connect the


the Frequency Modulation tuner on by turning the "FM On-Off" switch to the
Turn the tone control
The receiver will now be set for

Rotate the knob

the center one in which
If the signal is too strong, re-

and improved results in locations un-
by removing

If your radio does not have an FM band, an FM tuner may be installed.


?John F. Rider

Page 7:



Page 8:


Code No. SPECIFICATIONS Tolerances
C 39 L1 sect. electrolytic

Part No. Code No. Description

TRx 101 T6 Power supply

TRX 102 TS Output Transformer

TRX 10 T lst LF. Transformer

TRX 10 T 2nd LF. Transformer

CLA 102 T2 R.F. Interstage Coil

CLA 101 Tl SM. Antenna Coil

CLA 107 Loop Antenna Assembly for, 6A117WT

CLA 115 Loop Antenna Assembly for 6AI+7WTR

GLA 116 Loop Antenna Assemb1y for 6ch2 & 6ch3


PART NO. Description

SWX 101 Band Switch Assembly

KNX 101A Band Switch

KNX 102 Tuning Knob

KNX 10 Volume Control Knob

KNX 10 Tone Control Knob

SHX lOOC Tuning Shaft Assembly

PHX 100A Volume Control Assembly

PHX 101 Tone Control Assembly
?John F, Rider

Page 9:


BRA 118
BRA 123

Code No.



Mounting Sleeve

Tuner Assembly Complete

Dial and Bracket Assembly Complete
Glass Dial Plate

A.C. Line Cord Lock

Mounting Parts Assembly

Complete Dial and Cord

Speaker Assembly Complete 6AH7WT Model
Speaker Assembly Complete 6AM7WTR Model
Speaker 6AMYWT Model

speaker 6Ah7wTR Model

speaker Sch2 and 6ch3 hodo1s
Aero-Record Changer Model E

Grommet for Mounting

washer for Mounting

Mounting Screw

speaker cover - 6Ah7wTh Nodo1

Loop sh1o1o - 6ch2 and 6ch3 hooo1s
Socket Octal

Phone Motor Socket 3 Prong

Dial Cord Spring

Dial and Cord Assembly

A.C. Line Cord with Plug

Dial Cord

Specifications Tolerances
70,000 ohms 1/2 w. 10%
2,000 ohms 1/2 w. 10%
68,000 ohms 2 w. 20%
h7,000 ohms 1/2 w. 10%
39,000 ohms 1/2 w. 10%
33,000 ohms 1/2 w. 10%
27,000 ohms 1/2 w. 10%
18,000 ohms 2 w. 10%
15,000 ohms 1/2 w. 20%
10,000 ohms 1/2 w. 10%
0,700 ohms 2 w. 20%
3,900 ohms 1/2 w. 10%
300 ohms l w. 10%
2h0 ohms 2 w. 10%
2.2 ohms 1/2 w. 10%

?John F. Rider

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