Dynatuner FM-1 Instructies voor montage en uitlijning - Pagina 7

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&t'~ount

the 1.1". transformer Tl (one of the four

marked 432001) on the board. Note the slot in one

corner of the top of the can. Be sure to mount the

transformer with this slot oriented as indicated in

the pictorial. The transformer should snap into place

and seat firmly against the bOArd. Solder the mount-

ing tab next to C

fir.st, bu

do not solder the other

mounting tab. Solder each connecting lug. Avoid

excessive heat but be sure a good connection is made.

9(/Insert the ground strapfi into their slots ill each of

the tube sockets. Ohscrvc the direction of the offset

in these ground straps as shown in the pictorial

diagram. Solder both to the board.

Insert a round, toothpick or similar instrument into

eyelets /f2 and

!'4

from the bottom of the board. The

purpose of this is to prevent solder from filling these

eyelets. Now solder the eyelets to the copper on the

board and remove the toothpick. Insert the two heavy

leads of the antenna coil Ll into eyelets #2 and #4.

Note that this coil is mounted on the bottom of the

board, and is oriented to align the center slug with

the hole in the board. Solder the two leads to the

eyelets on the top of the board. It may be necessary

to scrape the coil leads, or to ream the eyelet(s)

slightly if the inside of the eyelet is not perfectly

free of solder, as this is a very snug

fit.

1,1 (

Strip a 1" piece of wire bare. Solder one end of it to

\--.-

eyelet !f3 on the bottom of the board.

Assembly 01 the I.F. Circuit Board PC-8

1 ( .,)" As before, support the board on an open box or

between two obiect.s so that the leads will have

clearance below the board as you insert components.

Insert all of the one-half watt resistors, after bending

their leads as before. Using the bottom plate, turn

the board over and solder all of the leads. Cut off

the excess leads. Be sure all the resistors are seated

firmly against the board.

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Fi~'

.1;.<..-

,._-,----.

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DETAil D

MOUNTING CAPACITOR C8

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DCB

.' :---

\' \ ---r-J:-

= ,

(

~~.~~.

'--

(

,~"

' ' - ,

--------~~

c._,E.) / , , '

~ ~ ~0-''-,

,\~

' - , .

TIGHTEN -

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~",,~

TRIANGULAR NUT FIRMLY

..........

WITH LONG NOSE PLIERS

' " ' -

Ir-,..

SOLDER AT 3 POINTS TO BOARD

......... /

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disc capacit.ors as showIl in detail C. Make certain

the 3 points. InsNt Ow top lead of the capacitor into

that the body of the capacitor touches the board.

the hole indicated in the pictorial, keeping it as short

The leads of the disc capacitors may be bent slightly

as pO:isible, and solder the lead.

to prevent them from falling out when the board

i~-=':-7')

turned over for soldering. Be careful not to alloy

7V~ount

the spccifll temperature compensating capaci.

the lead to form a "bridge" to another portion of thl.---/

.~~r

(;7 (2.55 mmfd N2200, with six color stripes) as

circuit. Solder each capacitor lead.

shown in the pictorial. Make sure it is seated snugly

agninst the hoard and against the tube socket. Solder

5( /Mount the oscillator coil L4 (the one with four

both leads.

leads at the bottom) in the group of four holes

indicated. The two heavier leads are inserted in

eyelets #10 and #11. Mount the mixer coil L3 (the

one with only two leads at the bottom and none at

the top) at eyelets #7 and #8. Be sure it is oriented

as shown on the pictorial diagram. Make sure each

coil form is seated firmly

the board and solder all

of the coil leads.

The osciIlator trimmer capacitor C8 is a white tubu-

lar ceramic form with a #6 screw and triangular nut.

The nut is supplied threaded onto the 3,1,," screw in

the hardware bag. Be sure that the points of the nut

face away from the screw head, and run the nut out

on the screw so that it is

Ih"

from the head. Insert

the tabs of the capacitor into the matching cutout

on the board. Note the location of the wire lead.

Hold the capacitor firmly against the board, and

turn the screw in from the bottom (see detail D)

until the triangular nut is firmly seated. Now tighten

the nut with long nose pliers, while pressing the

capacitor

the board. The points of the nut must

dig into the copper so that the capacitor mounting

is absolutely rigid. Solder the nut to the board at

2 M'insert the one watt and the two watt resistors and

the four heater chokes L6, L7, LR and L9. Solder

these components in place and trim off the excess

leads on completion.

3(J( Mount the four seven pin sockets, being careful to

see that none of the tabs are bent over on top of the

board. Position them as shown in the pictorial.

Mount the one nine pin socket, as shown.

It is

necessary to first snip off one of the molded tabs on

the side of this socket in order to clear the adjacent

resistor. This is easily done with a pair of pliers.

Make sure that each socket is seated firmly against

the board and then solder all of the pins and all of

the center ground pins.