Dynatuner FMX-3 Anweisungen für die Montage Ausrichtungsarbeiten - Seite 3

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feed line. This is not practical for everybody, however, but

orientation of the antenna for best reception is essential

even when using an indoor folded dipole of the type shown

in the Dynatuner FM-l manual. If relocation of an indoor

antenna is frequently required for best results, an indoor

all-band TV antenna of the "rabbit ears" type may prove

more convenient than the twin-lead folded dipole.

READ THESE INSTRUCTIONS FIRST

A. If this FMX-3 kit is

to be

incorporated into an already

completed FM-l Dynatuner, you may proceed with the

complete assembly instructions.

B. If

this

FMX-3 has been purchased as a Semi-Kit, with

the etched circuit board factory preassembled, you need

not check that section of the parts list which includes

the items on the PC-12 board. You may proceed with

the assembly instructions, ignoring the section describ-

ing the assembly of the etched circuit board.

C. If you have not yet assembled your FM-l Dynatuner

kit, you can save a few minutes assembly time by

noting the following changes in your FM-l manual:

1 ( ) page 5, column 2, step 1: Do not install resistors

R20, R30 or R35.

2 ( ) page 6, column 1, step 4 at top of page: Do not

install capacitor C28.

3 ( ) page 6, column 2, step 13: Delete this step.

4 ( ) page 7, column 2, step 31: Delete the sentence,

"Solder all three wires".

5 (

page 10: Front Panel Assembly: Delete steps #1

through #19 inclusive.

6 ( ) page 10, column 2, step 21: Delete this step and

replace it with the following instructions: Twist

together a 9" black wire and a 9" green wire.

Thread these wires through the small slot in the

front of the chassis, and through grommet #2.

Connect the black wire

lug #2 of the three lug

terminal strip. Connect the green wire to lug #1 of

the three lug terminal strip. Also at eyelet #37 on

the bottom of PC-8, solder should be flowed onto

the board and over to the chassis to make a good

ground contact

the chassis.

In the Preliminary Assembly and Wiring instructions

for the FMX-3, you can delete steps #1 through #8

inclusive. Now proceed with the assembly of your FM-l

Dynatuner through to the bottom of Page 10 in its

instruction book. The EM-84 tube, the volume control,

and the plastic front plate insert supplied with the FM-l

are not used with the FMX-3. Next assemble the FMX-3.

Install the 12AX7 in the FMX-3 but leave out the

6BL8jECF80 while aligning the FM-l according to its

instruction manual. Then align the FMX-3 as shown

later in this manual, after installing the 6BL8.

you have purchased your FM-l Dynatuner as a

Semi-Kit, and it is not yet assembled, you can save a

few minutes assembly time by noting the following

changes in your FM-l SK manual and supplementary

instructions:

1 (

page 6, column 2, step 13: Delete this step.

2 (

page 7, column 2, step 31: Delete the sentence

"Solder all three wires."

3 ( ) page 10 of Supplementary Instruction sheet for

the Semi-Kit: Front Panel Assembly: Delete

steps #1 through #11 inclusive. Add the following

instructions after step #11: Twist together a 9"

black wire and a 9" green wire. Thread these wires

through the small slot in the front of the chassis,

and through grommet #2. Connect the black wire

to lug .#2 of the three lug terminal strip. Connect

the green wire to lug #1 of the three lug terminal

strip.

In the Preliminary Assembly and Wiring instructions

for the FMX-3, you can delete steps #1 through #6

inclusive. Now proceed with the assembly of your FM-l

SK Dynatuner through to the bottom of the supple-

mentary instruction sheet. The EM-84 tube and the

plastic front plate insert supplied with the FM-l SK are

not used with the FMX-3. Next assemble the FMX-3.

Install the 12AX7 in the FMX-3 but leave out the

6BLBjECF80

while aligning the FM-l according

its

instruction manual. Then align the FMX-3 as shown

later in this manual, after installing the 6BLB.

ASSEMBLY INSTRUCTIONS

There are five basic steps in the incorporation of your

Dynakit FMX-3 Multiplex Integrator into the Dynatuner:

A. The installation of the unique

STEREOCATOR

tuning

system requires replacement of the present tuning eye

and socket, and a few component changes on the PC-8

board in the tuner.

B. The present volume control is replaced with a dual

volume control which operates on both stereo channels.

C. Assembly of the PC-12 integrator circuit board.

D. Interconnection of the FMX-3 and the FM-l tuner.

E. Alignment of the FMX-3.

Refer to the FM-l instruction manual for detailed

instructions on proper wiring and soldering technique. A

GOOD SOLDERING JOB IS ESSENTIAL TO THE

PERFORMANCE OF YOUR TUNER. ALL SOLDER-

ING MUST BE DONE WITH ROSIN CORE SOLDER.

Whenever soldering is required, the instructions indicate it

by "( S) ". If this symbol is not shown after a connection i!)

specified, it indicates that further connections will be made

at that point before soldering.

All resistors in the FMX-3 are

1/ 2

watt. The color coding

which specifies their value is indicated as they are used.

The first color is nearest the end of the resistor, and any

fourth color band should be ignored. All capacitors are

marked with their value. Whenever a length of hookup

wire is specified, strip

II!" from each end unless otherwise

specified.

BEFORE STARTING WORK ON THE DYNA-

TUNER, MAKE SURE THE LINE CORD IS DIS-

CONNECTED FROM ANY SOCKET.

Preliminary Assembly and Wiring

1 (

Remove the cover and bottom plate of the tuner.

Save all the hardware.

2 (

Remove the knobs. Remove the two brass screws and

the nut on the volume control which secure the brass

front plate. Remove the front plate and plastic insert.

3 ( ) Remove the three sets of #4 hardware which secure

•

the front panel to the chassis. Save the hardware.