DRAKE L7 Betreibershandbuch PDF herunterladen (Seite 11)

WARNING

The

L

7

has been designed incorporating several

interlocks to prevent dangerous electrical shock.

However,

it

is possible to disconnect the high

voltage terminal while the

L

7

is turned on. This

is

EXTREMELY DANGEROUS

and never

should be attempted for

am reason. When dis-

assembling the

L

7,

the high voltage terminal

should

be

disconnected

LAST

and at reassembly

the high voltage terminal should be connected

FIRST.

The

L

7

and its Power Supply can be

installed and serviced in complete safety

if

the

instructions in this manual are followed ex-

plicitly.

''

2-1.

UNPACKING

The

L

7

Linear Amplifier is shipped from the fac-

tory

in

3

separate cartone;

1

contains the Ampli-

fier,

1

contains the Power Supply and the third

contains the tubes and the miscellaneous hard-

ware.

Carefully unpack all three cartons and

examine

their contents for evidence of shipping

damage. If any damage

is

discovered, notify the

transportation company that delivered the

equip-

ment.

Be

sure to keep the cartons and packing

material

as

the transportation company

will

want

to examine them. Keep the carton and

packing

even

if

no shipping damage occurs. Having the

original

cartups available simplifies repacking

the equipment for storage or to return

it

to the

factory for service. Inspect the packing material

closely before storing

it

to be sure that none of the

accessory hardware has been overlooked. The dis-

mounted components and accessory hardware

shipped

with

the

L

7

should be checked against

the following list.

a. 2 tubes (Amplifier

V1

and V2)

b

.

2

Plate Caps (for Tubes)

c. (2)

632x518 screws (for Plate Caps)

d

.

2

Parasitic Chokes (Note TOP label)

e.

(2)

6432x114 Screws (connect Chokes to Caps)

f.

2

Internal Tooth Lock Washm (connect

Chokes

to

Caps)

g

.

2

Cables (1 Vox Relay,

1

Transmit

AGC)

h.

1

Plug,

%Pin

(Vox Relay)

i.

2 Resistors, 0.82 Ohm,

2

Watts (&placement

spares for Power Supply

R12)

j

.

2

Rubber Feet (For Viewing OptionB)

k.

2

studs (to attach rubber feet)

CHAPTER

2

INSTALLATION

1

.

1

Instruction

Manna1

(READ

ZF)

m.

1

Warranty F&gi&ration

Card

Nrn

EFll

out the enclosed

Warranty

Regidrdon

card

and

return

it

to the

~ryhnediately

to

insue

-tion

and validation

of

the

warran*.

2-2.

TUBE INSTALLATION

WARNING

Tubes

must

beMed

and thecabinetreplad

BEFORE

ANY

CO~ONS

are

made

to

the

L

7.

a. Remove the

6

screws

which

secure

the cabinet

to the amplifier and remove

the

cabinet

b. Refer to

fignre+L

Insert

both

tobes

into

the

sockets on the amplifier

ehassia

Note the pin

arrangement:

Pin

3

is

isola6ed.

c.

Install

the

plate

caps

on the

tubes

and secure

them

with

the scsews provided.

d. Attach the parasitic chokes to the top of each of

the plate

caps

with

the

screws

and

loekwashers

provided. Make

sure

that the

coils

of the two

chokes hang

DOWN.

The

word

TOP

stamped

on each choke musk

be

visible from the top of

the amplifier.

e. Attach both of

theremaining leads onthepara-

sitic chokes

to

the top

of

the

plate

RF

choke

using the

1/420

alnmmmn

screw

which

also

secures one lead from the coupling capacitors.

DO

NOT

wertighten this screw.

f.

Replace the cabinet and

secure

it

with the

6

screws removed

in

step

a

2-3.

LOCATION

In

general, the location of the

L

7

is

not Critical;

however, there are

certain

considerations which

must be

given

to

insure optimum performance.

Care

should be taken to insure that a space is pro-

vided around the Power Supply case to allow

ade

quate air circulation. Extremely hot

locations,

such as near radiators or heating

units,

should be

avoided. The back of the Amplifier case

must not be obstructed and should not be placed

closer than

1

inch from a wall or the

air

inlet, for

the blower

will

be blocked and overheating of the

tubes may occur.

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